./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.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-queue-add-2.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-queue-add-2.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-queue-add-2.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 21:57:14,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:57:14,949 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:57:14,957 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:57:14,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:57:14,983 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:57:14,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:57:14,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:57:14,987 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:57:14,992 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:57:14,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:57:14,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:57:14,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:57:14,994 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:57:14,995 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:57:14,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:57:14,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:57:14,995 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:57:14,995 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:57:14,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:57:14,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:57:14,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:57:14,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:57:14,998 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:57:14,998 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:57:14,998 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:57:14,998 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:57:14,998 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:57:14,999 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:57:14,999 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:57:15,000 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:57:15,001 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:57:15,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:57:15,001 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:57:15,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:57:15,001 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:57:15,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:57:15,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:57:15,002 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:57:15,002 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:57:15,002 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:57:15,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:57:15,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:57:15,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:57:15,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:57:15,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:57:15,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:57:15,287 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:57:15,287 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:57:15,288 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-06-27 21:57:16,407 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:57:16,573 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:57:16,574 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2024-06-27 21:57:16,579 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e4cb24a/3bc856aa0db64d3eb11337e57e3bda12/FLAG22e62a6a7 [2024-06-27 21:57:16,589 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66e4cb24a/3bc856aa0db64d3eb11337e57e3bda12 [2024-06-27 21:57:16,591 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:57:16,591 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:57:16,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-queue-add-2.wvr.yml/witness.yml [2024-06-27 21:57:16,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:57:16,640 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:57:16,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:57:16,641 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:57:16,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:57:16,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:57:16" (1/2) ... [2024-06-27 21:57:16,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e25c3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:57:16, skipping insertion in model container [2024-06-27 21:57:16,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:57:16" (1/2) ... [2024-06-27 21:57:16,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ea52e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:57:16, skipping insertion in model container [2024-06-27 21:57:16,647 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:57:16" (2/2) ... [2024-06-27 21:57:16,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e25c3b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:16, skipping insertion in model container [2024-06-27 21:57:16,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:57:16" (2/2) ... [2024-06-27 21:57:16,649 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:57:16,664 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:57:16,665 INFO L97 edCorrectnessWitness]: Location invariant before [L94-L94] ! multithreaded || (4294967296LL + (long long )q_back) + (long long )q_front >= 0LL [2024-06-27 21:57:16,665 INFO L97 edCorrectnessWitness]: Location invariant before [L93-L93] ! multithreaded || (4294967296LL + (long long )q_back) + (long long )q_front >= 0LL [2024-06-27 21:57:16,665 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:57:16,666 INFO L106 edCorrectnessWitness]: ghost_update [L92-L92] multithreaded = 1; [2024-06-27 21:57:16,682 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:57:16,829 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-queue-add-2.wvr.c[2722,2735] [2024-06-27 21:57:16,840 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:57:16,847 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:57:16,884 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-queue-add-2.wvr.c[2722,2735] [2024-06-27 21:57:16,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:57:16,898 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:57:16,899 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:16 WrapperNode [2024-06-27 21:57:16,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:57:16,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:57:16,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:57:16,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:57:16,926 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 09:57:16" (1/1) ... [2024-06-27 21:57:16,931 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 09:57:16" (1/1) ... [2024-06-27 21:57:16,950 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2024-06-27 21:57:16,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:57:16,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:57:16,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:57:16,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:57:16,969 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 09:57:16" (1/1) ... [2024-06-27 21:57:16,969 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 09:57:16" (1/1) ... [2024-06-27 21:57:16,979 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,002 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 21:57:17,002 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,003 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,012 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,016 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,019 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,020 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:57:17,037 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:57:17,037 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:57:17,037 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:57:17,038 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 09:57:16" (1/1) ... [2024-06-27 21:57:17,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:57:17,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:17,062 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 21:57:17,086 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 21:57:17,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:57:17,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 21:57:17,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 21:57:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 21:57:17,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 21:57:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:57:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:57:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:57:17,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:57:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:57:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:57:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 21:57:17,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:57:17,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:57:17,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:57:17,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:57:17,113 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 21:57:17,192 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:57:17,194 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:57:17,431 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:57:17,432 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:57:17,612 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:57:17,612 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 21:57:17,612 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:57:17 BoogieIcfgContainer [2024-06-27 21:57:17,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:57:17,615 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:57:17,616 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:57:17,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:57:17,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:57:16" (1/4) ... [2024-06-27 21:57:17,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b88eab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:57:17, skipping insertion in model container [2024-06-27 21:57:17,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:57:16" (2/4) ... [2024-06-27 21:57:17,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b88eab6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:57:17, skipping insertion in model container [2024-06-27 21:57:17,620 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 09:57:16" (3/4) ... [2024-06-27 21:57:17,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b88eab6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:57:17, skipping insertion in model container [2024-06-27 21:57:17,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:57:17" (4/4) ... [2024-06-27 21:57:17,622 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-06-27 21:57:17,639 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:57:17,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:57:17,640 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:57:17,681 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 21:57:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 82 flow [2024-06-27 21:57:17,734 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-06-27 21:57:17,734 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 21:57:17,736 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 5. Compared 48 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 21:57:17,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 82 flow [2024-06-27 21:57:17,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 74 flow [2024-06-27 21:57:17,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:57:17,755 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;@68a499c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:57:17,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 21:57:17,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:57:17,770 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2024-06-27 21:57:17,770 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:57:17,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:17,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-27 21:57:17,771 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 21:57:17,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:17,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1163860776, now seen corresponding path program 1 times [2024-06-27 21:57:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:17,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135078076] [2024-06-27 21:57:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:17,975 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 21:57:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135078076] [2024-06-27 21:57:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135078076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:17,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:17,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:57:17,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129675319] [2024-06-27 21:57:17,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:57:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:57:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:57:18,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:18,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 21:57:18,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:18,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:18,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:18,146 INFO L124 PetriNetUnfolderBase]: 153/311 cut-off events. [2024-06-27 21:57:18,147 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-06-27 21:57:18,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 311 events. 153/311 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1160 event pairs, 54 based on Foata normal form. 34/322 useless extension candidates. Maximal degree in co-relation 546. Up to 209 conditions per place. [2024-06-27 21:57:18,154 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 27 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-06-27 21:57:18,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 151 flow [2024-06-27 21:57:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:57:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:57:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-27 21:57:18,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-27 21:57:18,164 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 74 flow. Second operand 3 states and 65 transitions. [2024-06-27 21:57:18,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 151 flow [2024-06-27 21:57:18,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 141 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:18,170 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 87 flow [2024-06-27 21:57:18,171 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 21:57:18,175 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2024-06-27 21:57:18,175 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 87 flow [2024-06-27 21:57:18,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 21:57:18,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:18,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:18,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:57:18,176 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 21:57:18,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash -690523397, now seen corresponding path program 1 times [2024-06-27 21:57:18,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:18,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188358062] [2024-06-27 21:57:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:18,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:18,348 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 21:57:18,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:18,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188358062] [2024-06-27 21:57:18,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188358062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:18,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:18,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:57:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448202190] [2024-06-27 21:57:18,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:18,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:57:18,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:57:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:57:18,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-06-27 21:57:18,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:18,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:18,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-06-27 21:57:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:18,446 INFO L124 PetriNetUnfolderBase]: 144/340 cut-off events. [2024-06-27 21:57:18,446 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-06-27 21:57:18,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 340 events. 144/340 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1403 event pairs, 95 based on Foata normal form. 13/327 useless extension candidates. Maximal degree in co-relation 322. Up to 213 conditions per place. [2024-06-27 21:57:18,450 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 21 selfloop transitions, 2 changer transitions 9/42 dead transitions. [2024-06-27 21:57:18,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 173 flow [2024-06-27 21:57:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:57:18,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:57:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-06-27 21:57:18,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 21:57:18,454 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 87 flow. Second operand 4 states and 80 transitions. [2024-06-27 21:57:18,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 173 flow [2024-06-27 21:57:18,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:57:18,459 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 100 flow [2024-06-27 21:57:18,459 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 21:57:18,460 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2024-06-27 21:57:18,462 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 100 flow [2024-06-27 21:57:18,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:18,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:18,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:57:18,464 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 21:57:18,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash -905153600, now seen corresponding path program 1 times [2024-06-27 21:57:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003262204] [2024-06-27 21:57:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:18,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:18,577 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 21:57:18,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:18,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003262204] [2024-06-27 21:57:18,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003262204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:18,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:18,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:57:18,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369492427] [2024-06-27 21:57:18,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:18,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:57:18,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:57:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:57:18,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:18,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:18,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:18,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:18,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:18,662 INFO L124 PetriNetUnfolderBase]: 108/232 cut-off events. [2024-06-27 21:57:18,662 INFO L125 PetriNetUnfolderBase]: For 74/76 co-relation queries the response was YES. [2024-06-27 21:57:18,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 232 events. 108/232 cut-off events. For 74/76 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 812 event pairs, 29 based on Foata normal form. 27/246 useless extension candidates. Maximal degree in co-relation 483. Up to 143 conditions per place. [2024-06-27 21:57:18,663 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-06-27 21:57:18,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 163 flow [2024-06-27 21:57:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:57:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:57:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-27 21:57:18,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-06-27 21:57:18,667 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 100 flow. Second operand 4 states and 70 transitions. [2024-06-27 21:57:18,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 163 flow [2024-06-27 21:57:18,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 155 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:18,669 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 90 flow [2024-06-27 21:57:18,669 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 21:57:18,670 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-06-27 21:57:18,670 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 90 flow [2024-06-27 21:57:18,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:18,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:18,671 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 21:57:18,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:57:18,671 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 21:57:18,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:18,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1103288250, now seen corresponding path program 1 times [2024-06-27 21:57:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:18,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319352988] [2024-06-27 21:57:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:18,890 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 21:57:18,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319352988] [2024-06-27 21:57:18,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319352988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:18,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:18,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:57:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231082536] [2024-06-27 21:57:18,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:18,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:18,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 90 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 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 21:57:18,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:18,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:18,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:19,026 INFO L124 PetriNetUnfolderBase]: 202/419 cut-off events. [2024-06-27 21:57:19,026 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-06-27 21:57:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 419 events. 202/419 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1781 event pairs, 45 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 885. Up to 129 conditions per place. [2024-06-27 21:57:19,029 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 47 selfloop transitions, 9 changer transitions 6/68 dead transitions. [2024-06-27 21:57:19,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 307 flow [2024-06-27 21:57:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:57:19,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2024-06-27 21:57:19,032 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 90 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:57:19,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 307 flow [2024-06-27 21:57:19,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 68 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:19,035 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 136 flow [2024-06-27 21:57:19,035 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=136, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-06-27 21:57:19,036 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 9 predicate places. [2024-06-27 21:57:19,036 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 136 flow [2024-06-27 21:57:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 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 21:57:19,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:19,037 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 21:57:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:57:19,037 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 21:57:19,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1085192696, now seen corresponding path program 1 times [2024-06-27 21:57:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:19,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948121041] [2024-06-27 21:57:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:19,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:19,191 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 21:57:19,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:19,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948121041] [2024-06-27 21:57:19,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948121041] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:19,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441139483] [2024-06-27 21:57:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:19,209 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 21:57:19,237 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 21:57:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:19,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 21:57:19,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:19,350 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 21:57:19,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:19,435 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 21:57:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441139483] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:19,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:19,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 21:57:19,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889341311] [2024-06-27 21:57:19,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:57:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:57:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:57:19,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-06-27 21:57:19,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 136 flow. Second operand has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 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 21:57:19,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:19,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-06-27 21:57:19,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:19,560 INFO L124 PetriNetUnfolderBase]: 260/635 cut-off events. [2024-06-27 21:57:19,560 INFO L125 PetriNetUnfolderBase]: For 339/350 co-relation queries the response was YES. [2024-06-27 21:57:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 635 events. 260/635 cut-off events. For 339/350 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3362 event pairs, 149 based on Foata normal form. 28/651 useless extension candidates. Maximal degree in co-relation 1540. Up to 280 conditions per place. [2024-06-27 21:57:19,563 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 44 selfloop transitions, 5 changer transitions 4/64 dead transitions. [2024-06-27 21:57:19,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 337 flow [2024-06-27 21:57:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:57:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:57:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 21:57:19,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 21:57:19,564 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 136 flow. Second operand 6 states and 120 transitions. [2024-06-27 21:57:19,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 337 flow [2024-06-27 21:57:19,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 326 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:19,567 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 172 flow [2024-06-27 21:57:19,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-27 21:57:19,567 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2024-06-27 21:57:19,568 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 172 flow [2024-06-27 21:57:19,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 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 21:57:19,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:19,568 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 21:57:19,583 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 21:57:19,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:19,781 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 21:57:19,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash 445484030, now seen corresponding path program 1 times [2024-06-27 21:57:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947126626] [2024-06-27 21:57:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:19,954 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 21:57:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947126626] [2024-06-27 21:57:19,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947126626] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:19,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365696405] [2024-06-27 21:57:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:19,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:19,957 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 21:57:19,984 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 21:57:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:20,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 21:57:20,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:20,052 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 21:57:20,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:57:20,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365696405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:20,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:57:20,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-06-27 21:57:20,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765650470] [2024-06-27 21:57:20,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:20,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:57:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:57:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:20,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-06-27 21:57:20,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:20,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:20,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-06-27 21:57:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:20,146 INFO L124 PetriNetUnfolderBase]: 275/683 cut-off events. [2024-06-27 21:57:20,146 INFO L125 PetriNetUnfolderBase]: For 465/484 co-relation queries the response was YES. [2024-06-27 21:57:20,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 683 events. 275/683 cut-off events. For 465/484 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3583 event pairs, 68 based on Foata normal form. 25/698 useless extension candidates. Maximal degree in co-relation 1439. Up to 183 conditions per place. [2024-06-27 21:57:20,149 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 47 selfloop transitions, 7 changer transitions 5/69 dead transitions. [2024-06-27 21:57:20,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 380 flow [2024-06-27 21:57:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:57:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:57:20,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 21:57:20,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7205882352941176 [2024-06-27 21:57:20,150 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 172 flow. Second operand 4 states and 98 transitions. [2024-06-27 21:57:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 380 flow [2024-06-27 21:57:20,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 357 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:20,153 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 175 flow [2024-06-27 21:57:20,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-06-27 21:57:20,154 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2024-06-27 21:57:20,154 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 175 flow [2024-06-27 21:57:20,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:20,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:20,154 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 21:57:20,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:20,367 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,SelfDestructingSolverStorable5 [2024-06-27 21:57:20,368 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 21:57:20,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash -89546281, now seen corresponding path program 2 times [2024-06-27 21:57:20,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:20,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106604175] [2024-06-27 21:57:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:20,838 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 21:57:20,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106604175] [2024-06-27 21:57:20,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106604175] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666459568] [2024-06-27 21:57:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:57:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:20,840 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 21:57:20,868 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 21:57:20,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:57:20,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:20,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 21:57:20,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:21,091 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 21:57:21,115 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 21:57:21,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:21,232 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:21,232 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 21:57:21,411 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 21:57:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666459568] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:21,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:21,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 22 [2024-06-27 21:57:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834104801] [2024-06-27 21:57:21,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:21,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 21:57:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:21,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 21:57:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2024-06-27 21:57:21,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-06-27 21:57:21,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 175 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 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 21:57:21,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:21,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-06-27 21:57:21,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:22,338 INFO L124 PetriNetUnfolderBase]: 851/1743 cut-off events. [2024-06-27 21:57:22,338 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-27 21:57:22,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 1743 events. 851/1743 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10246 event pairs, 67 based on Foata normal form. 71/1806 useless extension candidates. Maximal degree in co-relation 2655. Up to 340 conditions per place. [2024-06-27 21:57:22,348 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 148 selfloop transitions, 43 changer transitions 16/214 dead transitions. [2024-06-27 21:57:22,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 214 transitions, 1312 flow [2024-06-27 21:57:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 21:57:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 21:57:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 378 transitions. [2024-06-27 21:57:22,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447058823529412 [2024-06-27 21:57:22,350 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 175 flow. Second operand 25 states and 378 transitions. [2024-06-27 21:57:22,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 214 transitions, 1312 flow [2024-06-27 21:57:22,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 214 transitions, 1236 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:22,355 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 639 flow [2024-06-27 21:57:22,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=639, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2024-06-27 21:57:22,356 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 51 predicate places. [2024-06-27 21:57:22,356 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 639 flow [2024-06-27 21:57:22,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 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 21:57:22,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:22,357 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 21:57:22,370 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 21:57:22,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:22,569 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 21:57:22,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1534489409, now seen corresponding path program 3 times [2024-06-27 21:57:22,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:22,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612935005] [2024-06-27 21:57:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:22,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:22,940 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 21:57:22,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612935005] [2024-06-27 21:57:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612935005] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080647092] [2024-06-27 21:57:22,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:57:22,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:22,942 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 21:57:22,982 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 21:57:23,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 21:57:23,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:23,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 21:57:23,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:23,219 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:23,219 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 21:57:23,233 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 21:57:23,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:23,332 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:23,332 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 21:57:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:23,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080647092] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:23,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:23,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-06-27 21:57:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878234976] [2024-06-27 21:57:23,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 21:57:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 21:57:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-06-27 21:57:23,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-06-27 21:57:23,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 639 flow. Second operand has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 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 21:57:23,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:23,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-06-27 21:57:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:24,644 INFO L124 PetriNetUnfolderBase]: 1474/2940 cut-off events. [2024-06-27 21:57:24,644 INFO L125 PetriNetUnfolderBase]: For 15394/15394 co-relation queries the response was YES. [2024-06-27 21:57:24,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10989 conditions, 2940 events. 1474/2940 cut-off events. For 15394/15394 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 18218 event pairs, 165 based on Foata normal form. 105/3032 useless extension candidates. Maximal degree in co-relation 8672. Up to 535 conditions per place. [2024-06-27 21:57:24,662 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 175 selfloop transitions, 70 changer transitions 2/254 dead transitions. [2024-06-27 21:57:24,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 254 transitions, 2252 flow [2024-06-27 21:57:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 21:57:24,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 21:57:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 328 transitions. [2024-06-27 21:57:24,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385026737967914 [2024-06-27 21:57:24,664 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 639 flow. Second operand 22 states and 328 transitions. [2024-06-27 21:57:24,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 254 transitions, 2252 flow [2024-06-27 21:57:24,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 254 transitions, 2110 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:24,685 INFO L231 Difference]: Finished difference. Result has 110 places, 120 transitions, 1248 flow [2024-06-27 21:57:24,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1248, PETRI_PLACES=110, PETRI_TRANSITIONS=120} [2024-06-27 21:57:24,687 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 76 predicate places. [2024-06-27 21:57:24,687 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 120 transitions, 1248 flow [2024-06-27 21:57:24,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 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 21:57:24,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:24,688 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 21:57:24,698 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 21:57:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:24,899 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 21:57:24,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash 653997804, now seen corresponding path program 4 times [2024-06-27 21:57:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396476384] [2024-06-27 21:57:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:25,438 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 21:57:25,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396476384] [2024-06-27 21:57:25,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396476384] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412654516] [2024-06-27 21:57:25,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:57:25,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:25,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:25,443 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 21:57:25,444 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 21:57:25,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:57:25,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:25,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 21:57:25,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:57:25,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:25,627 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:25,627 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 21:57:25,641 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 21:57:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412654516] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:25,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:25,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 4] total 17 [2024-06-27 21:57:25,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068730625] [2024-06-27 21:57:25,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:25,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 21:57:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:25,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 21:57:25,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-06-27 21:57:25,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-06-27 21:57:25,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 1248 flow. Second operand has 18 states, 18 states have (on average 9.777777777777779) internal successors, (176), 18 states have internal predecessors, (176), 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 21:57:25,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:25,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-06-27 21:57:25,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:26,396 INFO L124 PetriNetUnfolderBase]: 1716/3476 cut-off events. [2024-06-27 21:57:26,396 INFO L125 PetriNetUnfolderBase]: For 35448/35448 co-relation queries the response was YES. [2024-06-27 21:57:26,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15845 conditions, 3476 events. 1716/3476 cut-off events. For 35448/35448 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 22151 event pairs, 233 based on Foata normal form. 56/3529 useless extension candidates. Maximal degree in co-relation 13288. Up to 1311 conditions per place. [2024-06-27 21:57:26,426 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 145 selfloop transitions, 62 changer transitions 0/214 dead transitions. [2024-06-27 21:57:26,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 214 transitions, 2563 flow [2024-06-27 21:57:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:57:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:57:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 189 transitions. [2024-06-27 21:57:26,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2024-06-27 21:57:26,427 INFO L175 Difference]: Start difference. First operand has 110 places, 120 transitions, 1248 flow. Second operand 14 states and 189 transitions. [2024-06-27 21:57:26,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 214 transitions, 2563 flow [2024-06-27 21:57:26,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 214 transitions, 2288 flow, removed 126 selfloop flow, removed 8 redundant places. [2024-06-27 21:57:26,485 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1446 flow [2024-06-27 21:57:26,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1446, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-27 21:57:26,486 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 85 predicate places. [2024-06-27 21:57:26,486 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1446 flow [2024-06-27 21:57:26,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.777777777777779) internal successors, (176), 18 states have internal predecessors, (176), 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 21:57:26,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:26,487 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 21:57:26,498 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 21:57:26,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:26,693 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 21:57:26,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1870680463, now seen corresponding path program 1 times [2024-06-27 21:57:26,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:26,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665059380] [2024-06-27 21:57:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:26,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:27,274 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 21:57:27,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:27,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665059380] [2024-06-27 21:57:27,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665059380] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:27,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366806137] [2024-06-27 21:57:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:27,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:27,276 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 21:57:27,308 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 21:57:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:27,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 21:57:27,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:27,835 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 21:57:27,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:28,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:28,084 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 26 treesize of output 18 [2024-06-27 21:57:28,380 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 21:57:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366806137] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:28,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 21:57:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219936230] [2024-06-27 21:57:28,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:28,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 21:57:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 21:57:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 21:57:28,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:28,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1446 flow. Second operand has 41 states, 41 states have (on average 7.902439024390244) internal successors, (324), 41 states have internal predecessors, (324), 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 21:57:28,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:28,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:28,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:31,743 INFO L124 PetriNetUnfolderBase]: 4201/7804 cut-off events. [2024-06-27 21:57:31,743 INFO L125 PetriNetUnfolderBase]: For 74643/74643 co-relation queries the response was YES. [2024-06-27 21:57:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35648 conditions, 7804 events. 4201/7804 cut-off events. For 74643/74643 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 52307 event pairs, 407 based on Foata normal form. 6/7810 useless extension candidates. Maximal degree in co-relation 32371. Up to 3018 conditions per place. [2024-06-27 21:57:31,809 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 318 selfloop transitions, 186 changer transitions 44/554 dead transitions. [2024-06-27 21:57:31,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 554 transitions, 5914 flow [2024-06-27 21:57:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-06-27 21:57:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-06-27 21:57:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 621 transitions. [2024-06-27 21:57:31,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3652941176470588 [2024-06-27 21:57:31,813 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1446 flow. Second operand 50 states and 621 transitions. [2024-06-27 21:57:31,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 554 transitions, 5914 flow [2024-06-27 21:57:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 554 transitions, 5860 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:31,945 INFO L231 Difference]: Finished difference. Result has 182 places, 281 transitions, 3597 flow [2024-06-27 21:57:31,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3597, PETRI_PLACES=182, PETRI_TRANSITIONS=281} [2024-06-27 21:57:31,946 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 148 predicate places. [2024-06-27 21:57:31,946 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 281 transitions, 3597 flow [2024-06-27 21:57:31,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 7.902439024390244) internal successors, (324), 41 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:31,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:31,946 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 21:57:31,972 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 21:57:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:32,159 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 21:57:32,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash -291686809, now seen corresponding path program 2 times [2024-06-27 21:57:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678630818] [2024-06-27 21:57:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:32,734 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 21:57:32,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678630818] [2024-06-27 21:57:32,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678630818] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567449296] [2024-06-27 21:57:32,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:57:32,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:32,736 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 21:57:32,772 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 21:57:32,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:57:32,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:32,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 21:57:32,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:33,107 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 21:57:33,271 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 21:57:33,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:33,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:33,498 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 26 treesize of output 18 [2024-06-27 21:57:33,902 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 21:57:33,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567449296] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:33,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:33,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-06-27 21:57:33,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641916041] [2024-06-27 21:57:33,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:33,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-06-27 21:57:33,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-06-27 21:57:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2024-06-27 21:57:34,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:34,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 281 transitions, 3597 flow. Second operand has 41 states, 41 states have (on average 7.853658536585366) internal successors, (322), 41 states have internal predecessors, (322), 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 21:57:34,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:34,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:34,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:36,693 INFO L124 PetriNetUnfolderBase]: 4296/8061 cut-off events. [2024-06-27 21:57:36,693 INFO L125 PetriNetUnfolderBase]: For 96225/96225 co-relation queries the response was YES. [2024-06-27 21:57:36,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42872 conditions, 8061 events. 4296/8061 cut-off events. For 96225/96225 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 54808 event pairs, 516 based on Foata normal form. 2/8063 useless extension candidates. Maximal degree in co-relation 42760. Up to 4020 conditions per place. [2024-06-27 21:57:36,753 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 212 selfloop transitions, 303 changer transitions 71/592 dead transitions. [2024-06-27 21:57:36,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 592 transitions, 7570 flow [2024-06-27 21:57:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-06-27 21:57:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-06-27 21:57:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 526 transitions. [2024-06-27 21:57:36,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3437908496732026 [2024-06-27 21:57:36,755 INFO L175 Difference]: Start difference. First operand has 182 places, 281 transitions, 3597 flow. Second operand 45 states and 526 transitions. [2024-06-27 21:57:36,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 592 transitions, 7570 flow [2024-06-27 21:57:36,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 592 transitions, 7470 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 21:57:36,943 INFO L231 Difference]: Finished difference. Result has 228 places, 402 transitions, 6263 flow [2024-06-27 21:57:36,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=6263, PETRI_PLACES=228, PETRI_TRANSITIONS=402} [2024-06-27 21:57:36,944 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 194 predicate places. [2024-06-27 21:57:36,944 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 402 transitions, 6263 flow [2024-06-27 21:57:36,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 7.853658536585366) internal successors, (322), 41 states have internal predecessors, (322), 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 21:57:36,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:36,945 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 21:57:36,957 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 21:57:37,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:37,157 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 21:57:37,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1397411541, now seen corresponding path program 3 times [2024-06-27 21:57:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343108793] [2024-06-27 21:57:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:37,709 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 21:57:37,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:37,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343108793] [2024-06-27 21:57:37,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343108793] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:37,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063804265] [2024-06-27 21:57:37,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:57:37,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:37,710 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 21:57:37,712 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 21:57:37,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 21:57:37,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:37,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 21:57:37,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:38,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:38,066 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 24 treesize of output 17 [2024-06-27 21:57:38,346 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 21:57:38,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:38,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:38,607 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 37 treesize of output 21 [2024-06-27 21:57:38,900 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 21:57:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063804265] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:38,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:38,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-06-27 21:57:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499063675] [2024-06-27 21:57:38,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 21:57:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 21:57:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1644, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 21:57:39,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:39,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 402 transitions, 6263 flow. Second operand has 44 states, 44 states have (on average 7.7727272727272725) internal successors, (342), 44 states have internal predecessors, (342), 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 21:57:39,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:39,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:39,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:44,662 INFO L124 PetriNetUnfolderBase]: 5498/10308 cut-off events. [2024-06-27 21:57:44,663 INFO L125 PetriNetUnfolderBase]: For 167436/167436 co-relation queries the response was YES. [2024-06-27 21:57:44,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64240 conditions, 10308 events. 5498/10308 cut-off events. For 167436/167436 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 73733 event pairs, 207 based on Foata normal form. 3/10311 useless extension candidates. Maximal degree in co-relation 64098. Up to 2265 conditions per place. [2024-06-27 21:57:44,758 INFO L140 encePairwiseOnDemand]: 17/34 looper letters, 320 selfloop transitions, 668 changer transitions 46/1040 dead transitions. [2024-06-27 21:57:44,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1040 transitions, 16370 flow [2024-06-27 21:57:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-06-27 21:57:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2024-06-27 21:57:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 874 transitions. [2024-06-27 21:57:44,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570261437908497 [2024-06-27 21:57:44,761 INFO L175 Difference]: Start difference. First operand has 228 places, 402 transitions, 6263 flow. Second operand 72 states and 874 transitions. [2024-06-27 21:57:44,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1040 transitions, 16370 flow [2024-06-27 21:57:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1040 transitions, 15930 flow, removed 188 selfloop flow, removed 23 redundant places. [2024-06-27 21:57:45,338 INFO L231 Difference]: Finished difference. Result has 287 places, 757 transitions, 13750 flow [2024-06-27 21:57:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6010, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=13750, PETRI_PLACES=287, PETRI_TRANSITIONS=757} [2024-06-27 21:57:45,339 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 253 predicate places. [2024-06-27 21:57:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 757 transitions, 13750 flow [2024-06-27 21:57:45,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.7727272727272725) internal successors, (342), 44 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:45,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:45,339 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 21:57:45,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:45,550 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,SelfDestructingSolverStorable11 [2024-06-27 21:57:45,551 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 21:57:45,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 419095349, now seen corresponding path program 4 times [2024-06-27 21:57:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:45,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106129564] [2024-06-27 21:57:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:45,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:46,147 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 21:57:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106129564] [2024-06-27 21:57:46,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106129564] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155052239] [2024-06-27 21:57:46,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:57:46,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:46,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:46,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:46,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 21:57:46,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:57:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:46,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 21:57:46,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:46,465 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 21:57:46,662 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 21:57:46,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:46,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:46,876 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 26 treesize of output 18 [2024-06-27 21:57:47,207 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 21:57:47,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155052239] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:47,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:47,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-06-27 21:57:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364146329] [2024-06-27 21:57:47,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:47,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-06-27 21:57:47,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-06-27 21:57:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2024-06-27 21:57:47,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:47,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 757 transitions, 13750 flow. Second operand has 42 states, 42 states have (on average 7.857142857142857) internal successors, (330), 42 states have internal predecessors, (330), 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 21:57:47,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:47,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:47,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:50,715 INFO L124 PetriNetUnfolderBase]: 5439/10163 cut-off events. [2024-06-27 21:57:50,716 INFO L125 PetriNetUnfolderBase]: For 213445/213445 co-relation queries the response was YES. [2024-06-27 21:57:50,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73056 conditions, 10163 events. 5439/10163 cut-off events. For 213445/213445 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 72842 event pairs, 520 based on Foata normal form. 3/10166 useless extension candidates. Maximal degree in co-relation 72906. Up to 5158 conditions per place. [2024-06-27 21:57:50,823 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 370 selfloop transitions, 490 changer transitions 48/914 dead transitions. [2024-06-27 21:57:50,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 914 transitions, 17289 flow [2024-06-27 21:57:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 21:57:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 21:57:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 381 transitions. [2024-06-27 21:57:50,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.339572192513369 [2024-06-27 21:57:50,825 INFO L175 Difference]: Start difference. First operand has 287 places, 757 transitions, 13750 flow. Second operand 33 states and 381 transitions. [2024-06-27 21:57:50,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 914 transitions, 17289 flow [2024-06-27 21:57:52,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 914 transitions, 16300 flow, removed 458 selfloop flow, removed 26 redundant places. [2024-06-27 21:57:52,243 INFO L231 Difference]: Finished difference. Result has 295 places, 776 transitions, 15097 flow [2024-06-27 21:57:52,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=12889, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=15097, PETRI_PLACES=295, PETRI_TRANSITIONS=776} [2024-06-27 21:57:52,244 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 261 predicate places. [2024-06-27 21:57:52,244 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 776 transitions, 15097 flow [2024-06-27 21:57:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.857142857142857) internal successors, (330), 42 states have internal predecessors, (330), 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 21:57:52,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:52,245 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 21:57:52,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 21:57:52,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 21:57:52,456 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 21:57:52,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1364636520, now seen corresponding path program 5 times [2024-06-27 21:57:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293043545] [2024-06-27 21:57:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:53,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:53,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293043545] [2024-06-27 21:57:53,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293043545] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:53,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890275664] [2024-06-27 21:57:53,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:57:53,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:53,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:53,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:53,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 21:57:53,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 21:57:53,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:53,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 21:57:53,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:53,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:53,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:53,486 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 26 treesize of output 18 [2024-06-27 21:57:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 21:57:53,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890275664] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:53,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:53,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2024-06-27 21:57:53,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698948077] [2024-06-27 21:57:53,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:53,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 21:57:53,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 21:57:53,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 21:57:53,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:53,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 776 transitions, 15097 flow. Second operand has 35 states, 35 states have (on average 7.9714285714285715) internal successors, (279), 35 states have internal predecessors, (279), 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 21:57:53,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:53,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:53,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:57,153 INFO L124 PetriNetUnfolderBase]: 5482/10183 cut-off events. [2024-06-27 21:57:57,154 INFO L125 PetriNetUnfolderBase]: For 229440/229440 co-relation queries the response was YES. [2024-06-27 21:57:57,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76619 conditions, 10183 events. 5482/10183 cut-off events. For 229440/229440 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 71959 event pairs, 558 based on Foata normal form. 1/10184 useless extension candidates. Maximal degree in co-relation 76463. Up to 4820 conditions per place. [2024-06-27 21:57:57,292 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 474 selfloop transitions, 477 changer transitions 21/978 dead transitions. [2024-06-27 21:57:57,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 978 transitions, 19370 flow [2024-06-27 21:57:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 21:57:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 21:57:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 354 transitions. [2024-06-27 21:57:57,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37184873949579833 [2024-06-27 21:57:57,294 INFO L175 Difference]: Start difference. First operand has 295 places, 776 transitions, 15097 flow. Second operand 28 states and 354 transitions. [2024-06-27 21:57:57,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 978 transitions, 19370 flow [2024-06-27 21:57:58,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 978 transitions, 18563 flow, removed 70 selfloop flow, removed 16 redundant places. [2024-06-27 21:57:58,623 INFO L231 Difference]: Finished difference. Result has 300 places, 808 transitions, 16433 flow [2024-06-27 21:57:58,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14356, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16433, PETRI_PLACES=300, PETRI_TRANSITIONS=808} [2024-06-27 21:57:58,624 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 266 predicate places. [2024-06-27 21:57:58,624 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 808 transitions, 16433 flow [2024-06-27 21:57:58,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.9714285714285715) internal successors, (279), 35 states have internal predecessors, (279), 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 21:57:58,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:58,630 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 21:57:58,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 21:57:58,839 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,SelfDestructingSolverStorable13 [2024-06-27 21:57:58,840 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 21:57:58,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 825538596, now seen corresponding path program 6 times [2024-06-27 21:57:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:58,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624032170] [2024-06-27 21:57:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:59,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624032170] [2024-06-27 21:57:59,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624032170] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:59,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953136063] [2024-06-27 21:57:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:57:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:59,355 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 21:57:59,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 21:57:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:59,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 21:57:59,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:57:59,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:59,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:59,833 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 26 treesize of output 18 [2024-06-27 21:57:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 21:57:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953136063] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:59,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:59,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-06-27 21:57:59,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352616664] [2024-06-27 21:57:59,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 21:57:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 21:57:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 21:58:00,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:00,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 808 transitions, 16433 flow. Second operand has 36 states, 36 states have (on average 7.916666666666667) internal successors, (285), 36 states have internal predecessors, (285), 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 21:58:00,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:00,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:00,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:03,602 INFO L124 PetriNetUnfolderBase]: 5585/10388 cut-off events. [2024-06-27 21:58:03,602 INFO L125 PetriNetUnfolderBase]: For 241447/241447 co-relation queries the response was YES. [2024-06-27 21:58:03,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79418 conditions, 10388 events. 5585/10388 cut-off events. For 241447/241447 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 74226 event pairs, 532 based on Foata normal form. 1/10389 useless extension candidates. Maximal degree in co-relation 79269. Up to 3435 conditions per place. [2024-06-27 21:58:03,771 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 461 selfloop transitions, 641 changer transitions 40/1148 dead transitions. [2024-06-27 21:58:03,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1148 transitions, 23349 flow [2024-06-27 21:58:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-06-27 21:58:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-06-27 21:58:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 511 transitions. [2024-06-27 21:58:03,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34157754010695185 [2024-06-27 21:58:03,774 INFO L175 Difference]: Start difference. First operand has 300 places, 808 transitions, 16433 flow. Second operand 44 states and 511 transitions. [2024-06-27 21:58:03,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1148 transitions, 23349 flow [2024-06-27 21:58:05,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1148 transitions, 23257 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-06-27 21:58:05,287 INFO L231 Difference]: Finished difference. Result has 342 places, 929 transitions, 20214 flow [2024-06-27 21:58:05,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=16363, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=20214, PETRI_PLACES=342, PETRI_TRANSITIONS=929} [2024-06-27 21:58:05,288 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 308 predicate places. [2024-06-27 21:58:05,288 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 929 transitions, 20214 flow [2024-06-27 21:58:05,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.916666666666667) internal successors, (285), 36 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:05,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:05,288 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 21:58:05,299 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 21:58:05,493 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,SelfDestructingSolverStorable14 [2024-06-27 21:58:05,493 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 21:58:05,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1525502582, now seen corresponding path program 7 times [2024-06-27 21:58:05,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:05,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410148919] [2024-06-27 21:58:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:06,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410148919] [2024-06-27 21:58:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410148919] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:06,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96240876] [2024-06-27 21:58:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 21:58:06,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:06,155 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 21:58:06,156 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 21:58:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:06,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 21:58:06,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:06,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:06,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:06,560 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 26 treesize of output 18 [2024-06-27 21:58:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 21:58:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96240876] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:06,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:06,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-06-27 21:58:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321649745] [2024-06-27 21:58:06,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:06,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 21:58:06,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 21:58:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 21:58:06,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:06,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 929 transitions, 20214 flow. Second operand has 36 states, 36 states have (on average 7.972222222222222) internal successors, (287), 36 states have internal predecessors, (287), 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 21:58:06,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:06,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:06,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:10,386 INFO L124 PetriNetUnfolderBase]: 5695/10550 cut-off events. [2024-06-27 21:58:10,386 INFO L125 PetriNetUnfolderBase]: For 277617/277617 co-relation queries the response was YES. [2024-06-27 21:58:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86344 conditions, 10550 events. 5695/10550 cut-off events. For 277617/277617 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 75404 event pairs, 578 based on Foata normal form. 1/10551 useless extension candidates. Maximal degree in co-relation 86188. Up to 5824 conditions per place. [2024-06-27 21:58:10,510 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 438 selfloop transitions, 581 changer transitions 40/1065 dead transitions. [2024-06-27 21:58:10,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1065 transitions, 23837 flow [2024-06-27 21:58:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 21:58:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 21:58:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 333 transitions. [2024-06-27 21:58:10,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34978991596638653 [2024-06-27 21:58:10,512 INFO L175 Difference]: Start difference. First operand has 342 places, 929 transitions, 20214 flow. Second operand 28 states and 333 transitions. [2024-06-27 21:58:10,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1065 transitions, 23837 flow [2024-06-27 21:58:12,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1065 transitions, 23547 flow, removed 103 selfloop flow, removed 21 redundant places. [2024-06-27 21:58:12,258 INFO L231 Difference]: Finished difference. Result has 349 places, 943 transitions, 22093 flow [2024-06-27 21:58:12,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=19952, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=22093, PETRI_PLACES=349, PETRI_TRANSITIONS=943} [2024-06-27 21:58:12,259 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 315 predicate places. [2024-06-27 21:58:12,259 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 943 transitions, 22093 flow [2024-06-27 21:58:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.972222222222222) internal successors, (287), 36 states have internal predecessors, (287), 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 21:58:12,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:12,260 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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 21:58:12,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-06-27 21:58:12,470 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,SelfDestructingSolverStorable15 [2024-06-27 21:58:12,470 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 21:58:12,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash -880690007, now seen corresponding path program 8 times [2024-06-27 21:58:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710538681] [2024-06-27 21:58:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:13,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:13,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710538681] [2024-06-27 21:58:13,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710538681] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:13,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366642795] [2024-06-27 21:58:13,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:58:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:13,503 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 21:58:13,504 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 21:58:13,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:58:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:13,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 21:58:13,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:13,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:14,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:14,063 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 26 treesize of output 18 [2024-06-27 21:58:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 21:58:14,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366642795] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:14,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:14,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 10] total 37 [2024-06-27 21:58:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673634304] [2024-06-27 21:58:14,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:14,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 21:58:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 21:58:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1278, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 21:58:14,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 943 transitions, 22093 flow. Second operand has 38 states, 38 states have (on average 7.868421052631579) internal successors, (299), 38 states have internal predecessors, (299), 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 21:58:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:14,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:14,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:18,879 INFO L124 PetriNetUnfolderBase]: 5942/11035 cut-off events. [2024-06-27 21:58:18,879 INFO L125 PetriNetUnfolderBase]: For 341264/341264 co-relation queries the response was YES. [2024-06-27 21:58:18,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95086 conditions, 11035 events. 5942/11035 cut-off events. For 341264/341264 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 79511 event pairs, 553 based on Foata normal form. 1/11036 useless extension candidates. Maximal degree in co-relation 94928. Up to 4833 conditions per place. [2024-06-27 21:58:19,017 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 430 selfloop transitions, 738 changer transitions 27/1201 dead transitions. [2024-06-27 21:58:19,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1201 transitions, 28566 flow [2024-06-27 21:58:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 21:58:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 21:58:19,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 396 transitions. [2024-06-27 21:58:19,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33277310924369746 [2024-06-27 21:58:19,019 INFO L175 Difference]: Start difference. First operand has 349 places, 943 transitions, 22093 flow. Second operand 35 states and 396 transitions. [2024-06-27 21:58:19,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1201 transitions, 28566 flow [2024-06-27 21:58:20,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1201 transitions, 28403 flow, removed 31 selfloop flow, removed 20 redundant places. [2024-06-27 21:58:20,800 INFO L231 Difference]: Finished difference. Result has 364 places, 1056 transitions, 26334 flow [2024-06-27 21:58:20,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=21973, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=26334, PETRI_PLACES=364, PETRI_TRANSITIONS=1056} [2024-06-27 21:58:20,801 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 330 predicate places. [2024-06-27 21:58:20,801 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1056 transitions, 26334 flow [2024-06-27 21:58:20,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 7.868421052631579) internal successors, (299), 38 states have internal predecessors, (299), 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 21:58:20,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:20,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2024-06-27 21:58:20,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 21:58:21,012 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,SelfDestructingSolverStorable16 [2024-06-27 21:58:21,012 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 21:58:21,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash -998908809, now seen corresponding path program 9 times [2024-06-27 21:58:21,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:21,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515158543] [2024-06-27 21:58:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:21,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:21,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515158543] [2024-06-27 21:58:21,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515158543] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470578930] [2024-06-27 21:58:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:58:21,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:21,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:21,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:21,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 21:58:21,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 21:58:21,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:21,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 21:58:21,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:21,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:21,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470578930] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:21,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:21,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-06-27 21:58:21,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567313230] [2024-06-27 21:58:21,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:21,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 21:58:21,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 21:58:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2024-06-27 21:58:21,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:58:21,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1056 transitions, 26334 flow. Second operand has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:21,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:21,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:58:21,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:22,826 INFO L124 PetriNetUnfolderBase]: 1734/3776 cut-off events. [2024-06-27 21:58:22,826 INFO L125 PetriNetUnfolderBase]: For 128047/128150 co-relation queries the response was YES. [2024-06-27 21:58:22,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34690 conditions, 3776 events. 1734/3776 cut-off events. For 128047/128150 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 27341 event pairs, 140 based on Foata normal form. 120/3870 useless extension candidates. Maximal degree in co-relation 34578. Up to 1964 conditions per place. [2024-06-27 21:58:22,881 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 314 selfloop transitions, 15 changer transitions 103/574 dead transitions. [2024-06-27 21:58:22,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 574 transitions, 13109 flow [2024-06-27 21:58:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:58:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:58:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:58:22,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026737967914439 [2024-06-27 21:58:22,882 INFO L175 Difference]: Start difference. First operand has 364 places, 1056 transitions, 26334 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:58:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 574 transitions, 13109 flow [2024-06-27 21:58:23,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 574 transitions, 12144 flow, removed 130 selfloop flow, removed 48 redundant places. [2024-06-27 21:58:23,433 INFO L231 Difference]: Finished difference. Result has 293 places, 440 transitions, 9233 flow [2024-06-27 21:58:23,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=11026, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9233, PETRI_PLACES=293, PETRI_TRANSITIONS=440} [2024-06-27 21:58:23,434 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 259 predicate places. [2024-06-27 21:58:23,434 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 440 transitions, 9233 flow [2024-06-27 21:58:23,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.727272727272727) internal successors, (280), 22 states have internal predecessors, (280), 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 21:58:23,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:23,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2024-06-27 21:58:23,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 21:58:23,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:23,640 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 21:58:23,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -302685585, now seen corresponding path program 10 times [2024-06-27 21:58:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:23,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193819887] [2024-06-27 21:58:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:23,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193819887] [2024-06-27 21:58:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193819887] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358922374] [2024-06-27 21:58:23,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:58:23,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:23,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:23,720 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:23,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 21:58:23,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:58:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:23,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 21:58:23,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:58:23,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:58:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358922374] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:23,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 6] total 15 [2024-06-27 21:58:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163965888] [2024-06-27 21:58:23,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 21:58:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 21:58:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-27 21:58:24,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:58:24,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 440 transitions, 9233 flow. Second operand has 16 states, 16 states have (on average 13.8125) internal successors, (221), 16 states have internal predecessors, (221), 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 21:58:24,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:24,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:58:24,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:24,967 INFO L124 PetriNetUnfolderBase]: 2375/5010 cut-off events. [2024-06-27 21:58:24,967 INFO L125 PetriNetUnfolderBase]: For 150295/150470 co-relation queries the response was YES. [2024-06-27 21:58:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43918 conditions, 5010 events. 2375/5010 cut-off events. For 150295/150470 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 37038 event pairs, 239 based on Foata normal form. 65/5042 useless extension candidates. Maximal degree in co-relation 43839. Up to 1113 conditions per place. [2024-06-27 21:58:25,045 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 283 selfloop transitions, 158 changer transitions 52/621 dead transitions. [2024-06-27 21:58:25,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 621 transitions, 13293 flow [2024-06-27 21:58:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:58:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:58:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 231 transitions. [2024-06-27 21:58:25,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226244343891403 [2024-06-27 21:58:25,046 INFO L175 Difference]: Start difference. First operand has 293 places, 440 transitions, 9233 flow. Second operand 13 states and 231 transitions. [2024-06-27 21:58:25,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 621 transitions, 13293 flow [2024-06-27 21:58:25,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 621 transitions, 12669 flow, removed 118 selfloop flow, removed 26 redundant places. [2024-06-27 21:58:25,656 INFO L231 Difference]: Finished difference. Result has 258 places, 480 transitions, 10810 flow [2024-06-27 21:58:25,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10810, PETRI_PLACES=258, PETRI_TRANSITIONS=480} [2024-06-27 21:58:25,657 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 224 predicate places. [2024-06-27 21:58:25,657 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 480 transitions, 10810 flow [2024-06-27 21:58:25,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.8125) internal successors, (221), 16 states have internal predecessors, (221), 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 21:58:25,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:25,657 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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] [2024-06-27 21:58:25,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 21:58:25,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:25,868 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 21:58:25,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1433562176, now seen corresponding path program 11 times [2024-06-27 21:58:25,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180588884] [2024-06-27 21:58:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:26,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:26,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180588884] [2024-06-27 21:58:26,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180588884] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:26,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656193555] [2024-06-27 21:58:26,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:58:26,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:26,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:26,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 21:58:26,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 21:58:26,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:26,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 21:58:26,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:26,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:26,839 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 21:58:26,839 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 13 [2024-06-27 21:58:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656193555] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:27,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:27,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-06-27 21:58:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427502876] [2024-06-27 21:58:27,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 21:58:27,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 21:58:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 21:58:27,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-06-27 21:58:27,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 480 transitions, 10810 flow. Second operand has 33 states, 33 states have (on average 9.363636363636363) internal successors, (309), 33 states have internal predecessors, (309), 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 21:58:27,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:27,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-06-27 21:58:27,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:33,428 INFO L124 PetriNetUnfolderBase]: 8536/16548 cut-off events. [2024-06-27 21:58:33,428 INFO L125 PetriNetUnfolderBase]: For 571505/572750 co-relation queries the response was YES. [2024-06-27 21:58:33,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145775 conditions, 16548 events. 8536/16548 cut-off events. For 571505/572750 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 131491 event pairs, 512 based on Foata normal form. 865/17382 useless extension candidates. Maximal degree in co-relation 145702. Up to 4108 conditions per place. [2024-06-27 21:58:33,807 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 1092 selfloop transitions, 941 changer transitions 15/2138 dead transitions. [2024-06-27 21:58:33,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 2138 transitions, 51037 flow [2024-06-27 21:58:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-06-27 21:58:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-06-27 21:58:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 901 transitions. [2024-06-27 21:58:33,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-06-27 21:58:33,809 INFO L175 Difference]: Start difference. First operand has 258 places, 480 transitions, 10810 flow. Second operand 58 states and 901 transitions. [2024-06-27 21:58:33,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 2138 transitions, 51037 flow [2024-06-27 21:58:35,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 2138 transitions, 47321 flow, removed 844 selfloop flow, removed 17 redundant places. [2024-06-27 21:58:35,623 INFO L231 Difference]: Finished difference. Result has 304 places, 1329 transitions, 35921 flow [2024-06-27 21:58:35,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10078, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=35921, PETRI_PLACES=304, PETRI_TRANSITIONS=1329} [2024-06-27 21:58:35,624 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 270 predicate places. [2024-06-27 21:58:35,624 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1329 transitions, 35921 flow [2024-06-27 21:58:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.363636363636363) internal successors, (309), 33 states have internal predecessors, (309), 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 21:58:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:35,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 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] [2024-06-27 21:58:35,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 21:58:35,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:35,836 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 21:58:35,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1156781957, now seen corresponding path program 12 times [2024-06-27 21:58:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:35,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743093270] [2024-06-27 21:58:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:35,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:36,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:36,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743093270] [2024-06-27 21:58:36,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743093270] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:36,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379246604] [2024-06-27 21:58:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:58:36,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:36,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:36,758 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:36,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 21:58:36,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 21:58:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:36,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 21:58:36,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:37,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:37,075 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-06-27 21:58:37,075 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 26 treesize of output 14 [2024-06-27 21:58:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 21:58:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379246604] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:37,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:37,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 24 [2024-06-27 21:58:37,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061298836] [2024-06-27 21:58:37,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 21:58:37,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 21:58:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2024-06-27 21:58:37,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-06-27 21:58:37,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1329 transitions, 35921 flow. Second operand has 25 states, 25 states have (on average 9.64) internal successors, (241), 25 states have internal predecessors, (241), 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 21:58:37,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:37,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-06-27 21:58:37,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:44,226 INFO L124 PetriNetUnfolderBase]: 8965/17564 cut-off events. [2024-06-27 21:58:44,227 INFO L125 PetriNetUnfolderBase]: For 896108/897420 co-relation queries the response was YES. [2024-06-27 21:58:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174097 conditions, 17564 events. 8965/17564 cut-off events. For 896108/897420 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 141586 event pairs, 594 based on Foata normal form. 371/17923 useless extension candidates. Maximal degree in co-relation 173990. Up to 4993 conditions per place. [2024-06-27 21:58:44,686 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 950 selfloop transitions, 718 changer transitions 4/1762 dead transitions. [2024-06-27 21:58:44,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1762 transitions, 49238 flow [2024-06-27 21:58:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 21:58:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 21:58:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 336 transitions. [2024-06-27 21:58:44,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-06-27 21:58:44,695 INFO L175 Difference]: Start difference. First operand has 304 places, 1329 transitions, 35921 flow. Second operand 24 states and 336 transitions. [2024-06-27 21:58:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1762 transitions, 49238 flow [2024-06-27 21:58:49,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1762 transitions, 45945 flow, removed 1432 selfloop flow, removed 11 redundant places. [2024-06-27 21:58:49,280 INFO L231 Difference]: Finished difference. Result has 325 places, 1426 transitions, 39126 flow [2024-06-27 21:58:49,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=32993, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=613, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=39126, PETRI_PLACES=325, PETRI_TRANSITIONS=1426} [2024-06-27 21:58:49,282 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 291 predicate places. [2024-06-27 21:58:49,282 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1426 transitions, 39126 flow [2024-06-27 21:58:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.64) internal successors, (241), 25 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:49,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:49,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:49,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 21:58:49,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:49,494 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 21:58:49,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -375582318, now seen corresponding path program 13 times [2024-06-27 21:58:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:49,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044593166] [2024-06-27 21:58:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:50,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044593166] [2024-06-27 21:58:50,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044593166] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827906125] [2024-06-27 21:58:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 21:58:50,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:50,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:50,332 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:50,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 21:58:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:50,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 21:58:50,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:51,084 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-06-27 21:58:51,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2024-06-27 21:58:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:51,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:51,718 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 21:58:51,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2024-06-27 21:58:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827906125] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:52,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:52,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2024-06-27 21:58:52,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563952283] [2024-06-27 21:58:52,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:52,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-06-27 21:58:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-06-27 21:58:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=2949, Unknown=0, NotChecked=0, Total=3306 [2024-06-27 21:58:52,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:52,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1426 transitions, 39126 flow. Second operand has 58 states, 58 states have (on average 7.706896551724138) internal successors, (447), 58 states have internal predecessors, (447), 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 21:58:52,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:52,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:52,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:32,631 INFO L124 PetriNetUnfolderBase]: 28350/52018 cut-off events. [2024-06-27 21:59:32,632 INFO L125 PetriNetUnfolderBase]: For 2881161/2881161 co-relation queries the response was YES. [2024-06-27 21:59:33,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516636 conditions, 52018 events. 28350/52018 cut-off events. For 2881161/2881161 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 448360 event pairs, 2152 based on Foata normal form. 379/52397 useless extension candidates. Maximal degree in co-relation 516523. Up to 12554 conditions per place. [2024-06-27 21:59:34,166 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 1309 selfloop transitions, 3398 changer transitions 702/5415 dead transitions. [2024-06-27 21:59:34,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 5415 transitions, 144986 flow [2024-06-27 21:59:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2024-06-27 21:59:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2024-06-27 21:59:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 2278 transitions. [2024-06-27 21:59:34,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507853403141361 [2024-06-27 21:59:34,170 INFO L175 Difference]: Start difference. First operand has 325 places, 1426 transitions, 39126 flow. Second operand 191 states and 2278 transitions. [2024-06-27 21:59:34,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 5415 transitions, 144986 flow