./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-more-nonblocking-counter-alt2.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-more-nonblocking-counter-alt2.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 11:00:55,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:00:55,451 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:00:55,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:00:55,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:00:55,479 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:00:55,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:00:55,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:00:55,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:00:55,485 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:00:55,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:00:55,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:00:55,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:00:55,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:00:55,488 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:00:55,488 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:00:55,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:00:55,489 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:00:55,489 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:00:55,489 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:00:55,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:00:55,490 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:00:55,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:00:55,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:00:55,490 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:00:55,491 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:00:55,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:00:55,491 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:00:55,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:00:55,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:00:55,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:00:55,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:00:55,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:00:55,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:00:55,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:00:55,494 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:00:55,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:00:55,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:00:55,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:00:55,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:00:55,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:00:55,495 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:00:55,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:00:55,496 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:00:55,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:00:55,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:00:55,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:00:55,805 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:00:55,806 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:00:55,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-more-nonblocking-counter-alt2.wvr.yml/witness.yml [2024-05-12 11:00:55,886 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:00:55,887 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:00:55,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-05-12 11:00:57,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:00:57,254 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:00:57,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-05-12 11:00:57,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30b2f5d5/e92a4d5e68c2427f9bf0a00f12264586/FLAGf1baef5b1 [2024-05-12 11:00:57,273 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a30b2f5d5/e92a4d5e68c2427f9bf0a00f12264586 [2024-05-12 11:00:57,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:00:57,279 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:00:57,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:00:57,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:00:57,294 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:00:57,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:00:55" (1/2) ... [2024-05-12 11:00:57,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d099bc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:00:57, skipping insertion in model container [2024-05-12 11:00:57,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:00:55" (1/2) ... [2024-05-12 11:00:57,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16918e5a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:00:57, skipping insertion in model container [2024-05-12 11:00:57,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:00:57" (2/2) ... [2024-05-12 11:00:57,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d099bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57, skipping insertion in model container [2024-05-12 11:00:57,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:00:57" (2/2) ... [2024-05-12 11:00:57,300 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:00:57,314 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:00:57,318 INFO L97 edCorrectnessWitness]: Location invariant before [L74-L74] ! multithreaded || ((((4294967295LL - (long long )C) + (long long )M >= 0LL && (long long )C + (long long )M >= 0LL) && (4294967295LL + (long long )C) - (long long )M >= 0LL) && (8589934590LL - (long long )C) - (long long )M >= 0LL) [2024-05-12 11:00:57,318 INFO L97 edCorrectnessWitness]: Location invariant before [L73-L73] ! multithreaded || ((((4294967295LL - (long long )C) + (long long )M >= 0LL && (long long )C + (long long )M >= 0LL) && (4294967295LL + (long long )C) - (long long )M >= 0LL) && (8589934590LL - (long long )C) - (long long )M >= 0LL) [2024-05-12 11:00:57,319 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:00:57,319 INFO L106 edCorrectnessWitness]: ghost_update [L72-L72] multithreaded = 1; [2024-05-12 11:00:57,335 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:00:57,507 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2024-05-12 11:00:57,511 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:00:57,517 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 11:00:57,584 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2024-05-12 11:00:57,590 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:00:57,630 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:00:57,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57 WrapperNode [2024-05-12 11:00:57,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:00:57,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:00:57,632 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:00:57,632 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:00:57,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,668 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,696 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-05-12 11:00:57,696 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:00:57,697 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:00:57,697 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:00:57,697 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:00:57,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,731 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,767 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 11:00:57,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:00:57,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:00:57,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:00:57,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:00:57,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (1/1) ... [2024-05-12 11:00:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:00:57,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:00:57,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 11:00:57,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 11:00:57,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:00:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 11:00:57,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 11:00:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 11:00:57,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 11:00:57,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:00:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:00:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:00:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:00:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:00:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:00:57,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:00:57,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:00:57,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:00:57,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:00:57,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:00:57,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 11:00:57,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 11:00:57,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 11:00:57,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:00:57,915 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 11:00:58,061 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:00:58,062 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:00:58,261 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:00:58,262 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:00:58,379 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:00:58,379 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-05-12 11:00:58,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:00:58 BoogieIcfgContainer [2024-05-12 11:00:58,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:00:58,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:00:58,381 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:00:58,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:00:58,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:00:55" (1/4) ... [2024-05-12 11:00:58,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c2c29 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:00:58, skipping insertion in model container [2024-05-12 11:00:58,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:00:57" (2/4) ... [2024-05-12 11:00:58,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c2c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:00:58, skipping insertion in model container [2024-05-12 11:00:58,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:00:57" (3/4) ... [2024-05-12 11:00:58,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c2c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:00:58, skipping insertion in model container [2024-05-12 11:00:58,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:00:58" (4/4) ... [2024-05-12 11:00:58,386 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-05-12 11:00:58,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:00:58,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 11:00:58,399 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:00:58,436 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 11:00:58,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 28 transitions, 70 flow [2024-05-12 11:00:58,502 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2024-05-12 11:00:58,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 11:00:58,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 2/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-05-12 11:00:58,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 28 transitions, 70 flow [2024-05-12 11:00:58,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 25 transitions, 62 flow [2024-05-12 11:00:58,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:00:58,523 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;@6171c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:00:58,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 11:00:58,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:00:58,527 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-05-12 11:00:58,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:00:58,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:58,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 11:00:58,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:00:58,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1398755661, now seen corresponding path program 1 times [2024-05-12 11:00:58,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:58,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963238602] [2024-05-12 11:00:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:58,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:58,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963238602] [2024-05-12 11:00:58,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963238602] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:58,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:58,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 11:00:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345372235] [2024-05-12 11:00:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:58,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-05-12 11:00:58,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-05-12 11:00:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-05-12 11:00:58,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-05-12 11:00:58,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:58,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:58,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-05-12 11:00:58,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:58,801 INFO L124 PetriNetUnfolderBase]: 72/130 cut-off events. [2024-05-12 11:00:58,802 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-05-12 11:00:58,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 130 events. 72/130 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 412 event pairs, 32 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 210. Up to 116 conditions per place. [2024-05-12 11:00:58,805 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 17 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-05-12 11:00:58,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 92 flow [2024-05-12 11:00:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-05-12 11:00:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-05-12 11:00:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-05-12 11:00:58,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 11:00:58,816 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 62 flow. Second operand 2 states and 35 transitions. [2024-05-12 11:00:58,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 92 flow [2024-05-12 11:00:58,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 11:00:58,820 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2024-05-12 11:00:58,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2024-05-12 11:00:58,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2024-05-12 11:00:58,826 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2024-05-12 11:00:58,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:58,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:58,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:00:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:00:58,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:00:58,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1207402588, now seen corresponding path program 1 times [2024-05-12 11:00:58,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951155119] [2024-05-12 11:00:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:58,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:59,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:59,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951155119] [2024-05-12 11:00:59,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951155119] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:59,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:59,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 11:00:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439609005] [2024-05-12 11:00:59,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:59,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:00:59,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:00:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:00:59,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-05-12 11:00:59,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:59,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:59,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-05-12 11:00:59,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:59,086 INFO L124 PetriNetUnfolderBase]: 116/214 cut-off events. [2024-05-12 11:00:59,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:00:59,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 214 events. 116/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 788 event pairs, 22 based on Foata normal form. 1/205 useless extension candidates. Maximal degree in co-relation 412. Up to 127 conditions per place. [2024-05-12 11:00:59,088 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 24 selfloop transitions, 2 changer transitions 4/35 dead transitions. [2024-05-12 11:00:59,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 35 transitions, 137 flow [2024-05-12 11:00:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:00:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:00:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-05-12 11:00:59,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 11:00:59,090 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 52 transitions. [2024-05-12 11:00:59,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 35 transitions, 137 flow [2024-05-12 11:00:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 35 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 11:00:59,091 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 62 flow [2024-05-12 11:00:59,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2024-05-12 11:00:59,092 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -2 predicate places. [2024-05-12 11:00:59,092 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 62 flow [2024-05-12 11:00:59,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:59,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:59,093 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] [2024-05-12 11:00:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 11:00:59,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:00:59,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash -598377826, now seen corresponding path program 1 times [2024-05-12 11:00:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978375887] [2024-05-12 11:00:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:00:59,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:59,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978375887] [2024-05-12 11:00:59,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978375887] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:00:59,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:00:59,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:00:59,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319380532] [2024-05-12 11:00:59,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:00:59,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:00:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:00:59,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 11:00:59,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-05-12 11:00:59,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:59,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:59,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-05-12 11:00:59,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:00:59,295 INFO L124 PetriNetUnfolderBase]: 223/383 cut-off events. [2024-05-12 11:00:59,295 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-05-12 11:00:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 383 events. 223/383 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1456 event pairs, 118 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 774. Up to 266 conditions per place. [2024-05-12 11:00:59,300 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 26 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-05-12 11:00:59,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 139 flow [2024-05-12 11:00:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:00:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:00:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2024-05-12 11:00:59,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-05-12 11:00:59,303 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 62 flow. Second operand 4 states and 50 transitions. [2024-05-12 11:00:59,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 139 flow [2024-05-12 11:00:59,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:00:59,306 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 74 flow [2024-05-12 11:00:59,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-05-12 11:00:59,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-05-12 11:00:59,308 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 74 flow [2024-05-12 11:00:59,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:59,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:00:59,308 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] [2024-05-12 11:00:59,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:00:59,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:00:59,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:00:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1149094974, now seen corresponding path program 1 times [2024-05-12 11:00:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:00:59,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785037468] [2024-05-12 11:00:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:59,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:00:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:59,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:00:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785037468] [2024-05-12 11:00:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785037468] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:00:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608688057] [2024-05-12 11:00:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:00:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:00:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:00:59,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:00:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 11:00:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:00:59,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 11:00:59,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:00:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:59,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:00:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:00:59,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608688057] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:00:59,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:00:59,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 12 [2024-05-12 11:00:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056051923] [2024-05-12 11:00:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:00:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 11:00:59,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:00:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 11:00:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-05-12 11:00:59,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:00:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 74 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:00:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:00:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:00:59,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:00,162 INFO L124 PetriNetUnfolderBase]: 674/1125 cut-off events. [2024-05-12 11:01:00,163 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2024-05-12 11:01:00,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 1125 events. 674/1125 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5054 event pairs, 10 based on Foata normal form. 2/1046 useless extension candidates. Maximal degree in co-relation 2691. Up to 293 conditions per place. [2024-05-12 11:01:00,168 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 97 selfloop transitions, 17 changer transitions 14/129 dead transitions. [2024-05-12 11:01:00,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 129 transitions, 618 flow [2024-05-12 11:01:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:01:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:01:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-05-12 11:01:00,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-05-12 11:01:00,170 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 74 flow. Second operand 11 states and 160 transitions. [2024-05-12 11:01:00,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 129 transitions, 618 flow [2024-05-12 11:01:00,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 129 transitions, 600 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 11:01:00,173 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 207 flow [2024-05-12 11:01:00,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=207, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-05-12 11:01:00,174 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-05-12 11:01:00,174 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 207 flow [2024-05-12 11:01:00,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:00,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:00,174 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] [2024-05-12 11:01:00,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 11:01:00,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:00,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:00,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2020991272, now seen corresponding path program 2 times [2024-05-12 11:01:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:00,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606094868] [2024-05-12 11:01:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:00,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:01:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606094868] [2024-05-12 11:01:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606094868] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143361888] [2024-05-12 11:01:00,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:01:00,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:00,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:00,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:00,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 11:01:00,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:01:00,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:00,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:01:00,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:01:00,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:01:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143361888] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:00,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 9 [2024-05-12 11:01:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412487067] [2024-05-12 11:01:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:01:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:01:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:01:00,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-05-12 11:01:00,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 207 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:00,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:00,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-05-12 11:01:00,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:01,041 INFO L124 PetriNetUnfolderBase]: 535/971 cut-off events. [2024-05-12 11:01:01,041 INFO L125 PetriNetUnfolderBase]: For 1252/1269 co-relation queries the response was YES. [2024-05-12 11:01:01,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2886 conditions, 971 events. 535/971 cut-off events. For 1252/1269 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4572 event pairs, 32 based on Foata normal form. 42/1012 useless extension candidates. Maximal degree in co-relation 2872. Up to 389 conditions per place. [2024-05-12 11:01:01,046 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 62 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-05-12 11:01:01,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 85 transitions, 572 flow [2024-05-12 11:01:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:01:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:01:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-05-12 11:01:01,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-05-12 11:01:01,048 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 207 flow. Second operand 7 states and 94 transitions. [2024-05-12 11:01:01,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 85 transitions, 572 flow [2024-05-12 11:01:01,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 526 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 11:01:01,056 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 331 flow [2024-05-12 11:01:01,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-05-12 11:01:01,057 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-05-12 11:01:01,057 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 331 flow [2024-05-12 11:01:01,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:01,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:01,058 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] [2024-05-12 11:01:01,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-05-12 11:01:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:01,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:01,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1443894526, now seen corresponding path program 3 times [2024-05-12 11:01:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882653565] [2024-05-12 11:01:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:01,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:01,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882653565] [2024-05-12 11:01:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882653565] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20788256] [2024-05-12 11:01:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:01:01,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:01,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:01,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 11:01:01,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-05-12 11:01:01,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:01,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:01,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:01,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20788256] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:01,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-05-12 11:01:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509845636] [2024-05-12 11:01:01,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:01,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 11:01:01,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:01,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 11:01:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-05-12 11:01:01,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:01:01,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 331 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:01,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:01,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:01:01,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:02,593 INFO L124 PetriNetUnfolderBase]: 1253/2055 cut-off events. [2024-05-12 11:01:02,593 INFO L125 PetriNetUnfolderBase]: For 3663/3663 co-relation queries the response was YES. [2024-05-12 11:01:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 2055 events. 1253/2055 cut-off events. For 3663/3663 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9942 event pairs, 5 based on Foata normal form. 51/2106 useless extension candidates. Maximal degree in co-relation 6923. Up to 393 conditions per place. [2024-05-12 11:01:02,605 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 152 selfloop transitions, 95 changer transitions 25/273 dead transitions. [2024-05-12 11:01:02,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 273 transitions, 2031 flow [2024-05-12 11:01:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-05-12 11:01:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-05-12 11:01:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 290 transitions. [2024-05-12 11:01:02,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-05-12 11:01:02,607 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 331 flow. Second operand 27 states and 290 transitions. [2024-05-12 11:01:02,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 273 transitions, 2031 flow [2024-05-12 11:01:02,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 273 transitions, 1947 flow, removed 42 selfloop flow, removed 0 redundant places. [2024-05-12 11:01:02,618 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1252 flow [2024-05-12 11:01:02,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1252, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-05-12 11:01:02,618 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-05-12 11:01:02,619 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1252 flow [2024-05-12 11:01:02,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:02,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:02,619 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] [2024-05-12 11:01:02,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-05-12 11:01:02,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:02,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:02,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1071930394, now seen corresponding path program 4 times [2024-05-12 11:01:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:02,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428195601] [2024-05-12 11:01:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:02,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:02,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:02,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428195601] [2024-05-12 11:01:02,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428195601] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:02,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171102654] [2024-05-12 11:01:02,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:01:02,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:03,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:03,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 11:01:03,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:01:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:03,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:03,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:03,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:03,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171102654] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:03,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:03,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-05-12 11:01:03,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123108805] [2024-05-12 11:01:03,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:03,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 11:01:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 11:01:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-05-12 11:01:03,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:01:03,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1252 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:03,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:03,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:01:03,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:03,877 INFO L124 PetriNetUnfolderBase]: 1610/2709 cut-off events. [2024-05-12 11:01:03,877 INFO L125 PetriNetUnfolderBase]: For 21744/21771 co-relation queries the response was YES. [2024-05-12 11:01:03,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14207 conditions, 2709 events. 1610/2709 cut-off events. For 21744/21771 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14674 event pairs, 176 based on Foata normal form. 18/2715 useless extension candidates. Maximal degree in co-relation 14172. Up to 902 conditions per place. [2024-05-12 11:01:03,897 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 132 selfloop transitions, 155 changer transitions 7/311 dead transitions. [2024-05-12 11:01:03,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 311 transitions, 3626 flow [2024-05-12 11:01:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-05-12 11:01:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-05-12 11:01:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 174 transitions. [2024-05-12 11:01:03,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-05-12 11:01:03,898 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1252 flow. Second operand 16 states and 174 transitions. [2024-05-12 11:01:03,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 311 transitions, 3626 flow [2024-05-12 11:01:03,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 311 transitions, 3399 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-05-12 11:01:03,984 INFO L231 Difference]: Finished difference. Result has 117 places, 246 transitions, 3143 flow [2024-05-12 11:01:03,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3143, PETRI_PLACES=117, PETRI_TRANSITIONS=246} [2024-05-12 11:01:03,984 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-05-12 11:01:03,985 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 246 transitions, 3143 flow [2024-05-12 11:01:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:03,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:03,985 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] [2024-05-12 11:01:04,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-05-12 11:01:04,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:04,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:04,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1888867520, now seen corresponding path program 5 times [2024-05-12 11:01:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:04,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41712467] [2024-05-12 11:01:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41712467] [2024-05-12 11:01:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41712467] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224861536] [2024-05-12 11:01:04,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:01:04,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:04,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:04,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 11:01:04,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:01:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:04,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:04,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:04,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224861536] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:04,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:04,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-05-12 11:01:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101094408] [2024-05-12 11:01:04,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:04,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 11:01:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 11:01:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-05-12 11:01:04,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:01:04,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 246 transitions, 3143 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:04,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:01:04,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:06,097 INFO L124 PetriNetUnfolderBase]: 2299/3718 cut-off events. [2024-05-12 11:01:06,098 INFO L125 PetriNetUnfolderBase]: For 41793/41793 co-relation queries the response was YES. [2024-05-12 11:01:06,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 3718 events. 2299/3718 cut-off events. For 41793/41793 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20052 event pairs, 34 based on Foata normal form. 74/3792 useless extension candidates. Maximal degree in co-relation 22536. Up to 716 conditions per place. [2024-05-12 11:01:06,143 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 223 selfloop transitions, 320 changer transitions 2/546 dead transitions. [2024-05-12 11:01:06,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 546 transitions, 7038 flow [2024-05-12 11:01:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-05-12 11:01:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-05-12 11:01:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 384 transitions. [2024-05-12 11:01:06,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3609022556390977 [2024-05-12 11:01:06,146 INFO L175 Difference]: Start difference. First operand has 117 places, 246 transitions, 3143 flow. Second operand 38 states and 384 transitions. [2024-05-12 11:01:06,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 546 transitions, 7038 flow [2024-05-12 11:01:06,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 546 transitions, 6752 flow, removed 143 selfloop flow, removed 1 redundant places. [2024-05-12 11:01:06,336 INFO L231 Difference]: Finished difference. Result has 173 places, 388 transitions, 5967 flow [2024-05-12 11:01:06,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5967, PETRI_PLACES=173, PETRI_TRANSITIONS=388} [2024-05-12 11:01:06,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-05-12 11:01:06,337 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 388 transitions, 5967 flow [2024-05-12 11:01:06,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:06,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:06,337 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] [2024-05-12 11:01:06,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 11:01:06,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:06,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:06,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:06,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1195728196, now seen corresponding path program 6 times [2024-05-12 11:01:06,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:06,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456770334] [2024-05-12 11:01:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:06,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456770334] [2024-05-12 11:01:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456770334] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805146790] [2024-05-12 11:01:06,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:01:06,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:06,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:06,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:06,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 11:01:06,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 11:01:06,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:06,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:06,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:06,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:07,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805146790] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:07,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:07,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-05-12 11:01:07,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777729900] [2024-05-12 11:01:07,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:07,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-05-12 11:01:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-05-12 11:01:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2024-05-12 11:01:07,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:01:07,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 388 transitions, 5967 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:07,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:07,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:01:07,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:09,204 INFO L124 PetriNetUnfolderBase]: 2863/4825 cut-off events. [2024-05-12 11:01:09,205 INFO L125 PetriNetUnfolderBase]: For 106902/107013 co-relation queries the response was YES. [2024-05-12 11:01:09,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35008 conditions, 4825 events. 2863/4825 cut-off events. For 106902/107013 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29148 event pairs, 73 based on Foata normal form. 128/4950 useless extension candidates. Maximal degree in co-relation 34945. Up to 926 conditions per place. [2024-05-12 11:01:09,342 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 222 selfloop transitions, 514 changer transitions 2/758 dead transitions. [2024-05-12 11:01:09,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 758 transitions, 11954 flow [2024-05-12 11:01:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-05-12 11:01:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-05-12 11:01:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 489 transitions. [2024-05-12 11:01:09,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371580547112462 [2024-05-12 11:01:09,347 INFO L175 Difference]: Start difference. First operand has 173 places, 388 transitions, 5967 flow. Second operand 47 states and 489 transitions. [2024-05-12 11:01:09,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 758 transitions, 11954 flow [2024-05-12 11:01:09,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 758 transitions, 11567 flow, removed 160 selfloop flow, removed 6 redundant places. [2024-05-12 11:01:09,971 INFO L231 Difference]: Finished difference. Result has 238 places, 589 transitions, 10585 flow [2024-05-12 11:01:09,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=10585, PETRI_PLACES=238, PETRI_TRANSITIONS=589} [2024-05-12 11:01:09,972 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-05-12 11:01:09,972 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 589 transitions, 10585 flow [2024-05-12 11:01:09,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:09,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:09,972 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] [2024-05-12 11:01:09,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-05-12 11:01:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:10,187 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash -773765286, now seen corresponding path program 7 times [2024-05-12 11:01:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424534371] [2024-05-12 11:01:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:10,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:10,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424534371] [2024-05-12 11:01:10,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424534371] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:10,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173374408] [2024-05-12 11:01:10,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:01:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:10,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:10,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 11:01:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:10,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:10,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:10,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:10,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173374408] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:10,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:10,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-05-12 11:01:10,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367875801] [2024-05-12 11:01:10,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:10,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 11:01:10,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 11:01:10,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-05-12 11:01:10,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:01:10,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 589 transitions, 10585 flow. Second operand has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:10,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:10,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:01:10,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:12,472 INFO L124 PetriNetUnfolderBase]: 3195/5432 cut-off events. [2024-05-12 11:01:12,473 INFO L125 PetriNetUnfolderBase]: For 141788/141857 co-relation queries the response was YES. [2024-05-12 11:01:12,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45157 conditions, 5432 events. 3195/5432 cut-off events. For 141788/141857 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 34280 event pairs, 151 based on Foata normal form. 24/5450 useless extension candidates. Maximal degree in co-relation 45069. Up to 1001 conditions per place. [2024-05-12 11:01:12,525 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 221 selfloop transitions, 511 changer transitions 6/758 dead transitions. [2024-05-12 11:01:12,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 758 transitions, 14690 flow [2024-05-12 11:01:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-05-12 11:01:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-05-12 11:01:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 241 transitions. [2024-05-12 11:01:12,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912337662337662 [2024-05-12 11:01:12,527 INFO L175 Difference]: Start difference. First operand has 238 places, 589 transitions, 10585 flow. Second operand 22 states and 241 transitions. [2024-05-12 11:01:12,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 758 transitions, 14690 flow [2024-05-12 11:01:13,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 758 transitions, 14197 flow, removed 225 selfloop flow, removed 4 redundant places. [2024-05-12 11:01:13,960 INFO L231 Difference]: Finished difference. Result has 264 places, 676 transitions, 13595 flow [2024-05-12 11:01:13,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=10199, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13595, PETRI_PLACES=264, PETRI_TRANSITIONS=676} [2024-05-12 11:01:13,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-05-12 11:01:13,961 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 676 transitions, 13595 flow [2024-05-12 11:01:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:13,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:13,961 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] [2024-05-12 11:01:13,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-05-12 11:01:14,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:14,173 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:14,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash -703873634, now seen corresponding path program 8 times [2024-05-12 11:01:14,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:14,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027550771] [2024-05-12 11:01:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:14,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:14,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027550771] [2024-05-12 11:01:14,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027550771] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:14,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958277334] [2024-05-12 11:01:14,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:01:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:14,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:14,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-05-12 11:01:14,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:01:14,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:14,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:14,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:14,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:14,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958277334] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:14,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:14,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-05-12 11:01:14,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532751954] [2024-05-12 11:01:14,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:14,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-05-12 11:01:14,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-05-12 11:01:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2024-05-12 11:01:14,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:01:14,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 676 transitions, 13595 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:14,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:14,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:01:14,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:16,815 INFO L124 PetriNetUnfolderBase]: 3758/6424 cut-off events. [2024-05-12 11:01:16,815 INFO L125 PetriNetUnfolderBase]: For 238184/238316 co-relation queries the response was YES. [2024-05-12 11:01:16,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58114 conditions, 6424 events. 3758/6424 cut-off events. For 238184/238316 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41980 event pairs, 224 based on Foata normal form. 125/6540 useless extension candidates. Maximal degree in co-relation 58016. Up to 1225 conditions per place. [2024-05-12 11:01:16,985 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 272 selfloop transitions, 621 changer transitions 1/914 dead transitions. [2024-05-12 11:01:16,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 914 transitions, 19426 flow [2024-05-12 11:01:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-05-12 11:01:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-05-12 11:01:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 264 transitions. [2024-05-12 11:01:16,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40993788819875776 [2024-05-12 11:01:16,989 INFO L175 Difference]: Start difference. First operand has 264 places, 676 transitions, 13595 flow. Second operand 23 states and 264 transitions. [2024-05-12 11:01:16,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 914 transitions, 19426 flow [2024-05-12 11:01:19,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 914 transitions, 19292 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-05-12 11:01:19,209 INFO L231 Difference]: Finished difference. Result has 290 places, 809 transitions, 18935 flow [2024-05-12 11:01:19,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=13486, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18935, PETRI_PLACES=290, PETRI_TRANSITIONS=809} [2024-05-12 11:01:19,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2024-05-12 11:01:19,211 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 809 transitions, 18935 flow [2024-05-12 11:01:19,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:19,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:19,211 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] [2024-05-12 11:01:19,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-05-12 11:01:19,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-05-12 11:01:19,420 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:19,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash -814252382, now seen corresponding path program 9 times [2024-05-12 11:01:19,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:19,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309052538] [2024-05-12 11:01:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:19,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309052538] [2024-05-12 11:01:19,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309052538] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680242656] [2024-05-12 11:01:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:01:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:19,579 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:19,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-05-12 11:01:19,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-05-12 11:01:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:19,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:19,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:19,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:19,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680242656] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:19,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:19,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-05-12 11:01:19,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085913540] [2024-05-12 11:01:19,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:19,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 11:01:19,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 11:01:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-05-12 11:01:19,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:01:19,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 809 transitions, 18935 flow. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:19,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:19,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:01:19,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:25,003 INFO L124 PetriNetUnfolderBase]: 7657/12381 cut-off events. [2024-05-12 11:01:25,003 INFO L125 PetriNetUnfolderBase]: For 527235/527235 co-relation queries the response was YES. [2024-05-12 11:01:25,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124101 conditions, 12381 events. 7657/12381 cut-off events. For 527235/527235 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 81043 event pairs, 119 based on Foata normal form. 163/12544 useless extension candidates. Maximal degree in co-relation 123995. Up to 2322 conditions per place. [2024-05-12 11:01:25,149 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 552 selfloop transitions, 1299 changer transitions 28/1880 dead transitions. [2024-05-12 11:01:25,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1880 transitions, 47091 flow [2024-05-12 11:01:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-05-12 11:01:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-05-12 11:01:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 462 transitions. [2024-05-12 11:01:25,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358695652173913 [2024-05-12 11:01:25,153 INFO L175 Difference]: Start difference. First operand has 290 places, 809 transitions, 18935 flow. Second operand 46 states and 462 transitions. [2024-05-12 11:01:25,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1880 transitions, 47091 flow [2024-05-12 11:01:32,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1880 transitions, 46565 flow, removed 178 selfloop flow, removed 9 redundant places. [2024-05-12 11:01:32,275 INFO L231 Difference]: Finished difference. Result has 353 places, 1630 transitions, 45177 flow [2024-05-12 11:01:32,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=18636, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=45177, PETRI_PLACES=353, PETRI_TRANSITIONS=1630} [2024-05-12 11:01:32,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2024-05-12 11:01:32,277 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1630 transitions, 45177 flow [2024-05-12 11:01:32,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:32,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:32,277 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] [2024-05-12 11:01:32,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-05-12 11:01:32,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:32,484 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:32,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash -985920904, now seen corresponding path program 10 times [2024-05-12 11:01:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:32,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686013980] [2024-05-12 11:01:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:32,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686013980] [2024-05-12 11:01:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686013980] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521242220] [2024-05-12 11:01:32,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:01:32,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:32,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:32,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:32,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-05-12 11:01:32,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:01:32,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:32,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:01:32,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:32,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521242220] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:32,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:32,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-05-12 11:01:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570161358] [2024-05-12 11:01:32,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 11:01:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 11:01:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-05-12 11:01:32,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:01:32,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1630 transitions, 45177 flow. Second operand has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:32,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:32,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:01:32,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:39,213 INFO L124 PetriNetUnfolderBase]: 7204/11995 cut-off events. [2024-05-12 11:01:39,214 INFO L125 PetriNetUnfolderBase]: For 537656/537692 co-relation queries the response was YES. [2024-05-12 11:01:39,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139251 conditions, 11995 events. 7204/11995 cut-off events. For 537656/537692 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 82426 event pairs, 837 based on Foata normal form. 24/11998 useless extension candidates. Maximal degree in co-relation 139120. Up to 4226 conditions per place. [2024-05-12 11:01:39,374 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 532 selfloop transitions, 1193 changer transitions 8/1788 dead transitions. [2024-05-12 11:01:39,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1788 transitions, 52047 flow [2024-05-12 11:01:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-05-12 11:01:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-05-12 11:01:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 215 transitions. [2024-05-12 11:01:39,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-05-12 11:01:39,389 INFO L175 Difference]: Start difference. First operand has 353 places, 1630 transitions, 45177 flow. Second operand 20 states and 215 transitions. [2024-05-12 11:01:39,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1788 transitions, 52047 flow [2024-05-12 11:01:50,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1788 transitions, 50585 flow, removed 719 selfloop flow, removed 3 redundant places. [2024-05-12 11:01:50,549 INFO L231 Difference]: Finished difference. Result has 375 places, 1722 transitions, 51064 flow [2024-05-12 11:01:50,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=43775, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=51064, PETRI_PLACES=375, PETRI_TRANSITIONS=1722} [2024-05-12 11:01:50,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2024-05-12 11:01:50,551 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1722 transitions, 51064 flow [2024-05-12 11:01:50,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:50,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:01:50,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:01:50,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-05-12 11:01:50,800 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,SelfDestructingSolverStorable12 [2024-05-12 11:01:50,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:01:50,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:01:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1002874104, now seen corresponding path program 11 times [2024-05-12 11:01:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:01:50,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225266992] [2024-05-12 11:01:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:01:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:01:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:01:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:01:50,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225266992] [2024-05-12 11:01:50,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225266992] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:01:50,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290265513] [2024-05-12 11:01:50,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:01:50,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:01:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:01:50,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:01:50,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-05-12 11:01:50,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:01:50,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:01:50,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 11:01:50,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:01:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:51,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:01:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:01:51,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290265513] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:01:51,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:01:51,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2024-05-12 11:01:51,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940270478] [2024-05-12 11:01:51,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:01:51,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-05-12 11:01:51,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:01:51,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-05-12 11:01:51,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-05-12 11:01:51,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:01:51,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1722 transitions, 51064 flow. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 18 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:01:51,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:01:51,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:01:51,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:01:58,815 INFO L124 PetriNetUnfolderBase]: 7768/12958 cut-off events. [2024-05-12 11:01:58,816 INFO L125 PetriNetUnfolderBase]: For 535535/535556 co-relation queries the response was YES. [2024-05-12 11:01:58,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156907 conditions, 12958 events. 7768/12958 cut-off events. For 535535/535556 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 90326 event pairs, 248 based on Foata normal form. 57/12994 useless extension candidates. Maximal degree in co-relation 156769. Up to 2418 conditions per place. [2024-05-12 11:01:59,010 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 249 selfloop transitions, 1754 changer transitions 5/2063 dead transitions. [2024-05-12 11:01:59,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 2063 transitions, 62889 flow [2024-05-12 11:01:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-05-12 11:01:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-05-12 11:01:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 362 transitions. [2024-05-12 11:01:59,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34022556390977443 [2024-05-12 11:01:59,012 INFO L175 Difference]: Start difference. First operand has 375 places, 1722 transitions, 51064 flow. Second operand 38 states and 362 transitions. [2024-05-12 11:01:59,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 2063 transitions, 62889 flow [2024-05-12 11:02:11,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 2063 transitions, 62621 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-05-12 11:02:11,184 INFO L231 Difference]: Finished difference. Result has 407 places, 1964 transitions, 63648 flow [2024-05-12 11:02:11,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50783, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=63648, PETRI_PLACES=407, PETRI_TRANSITIONS=1964} [2024-05-12 11:02:11,186 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2024-05-12 11:02:11,186 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1964 transitions, 63648 flow [2024-05-12 11:02:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 18 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:11,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:11,186 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] [2024-05-12 11:02:11,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-05-12 11:02:11,396 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,SelfDestructingSolverStorable13 [2024-05-12 11:02:11,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:11,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 269157868, now seen corresponding path program 12 times [2024-05-12 11:02:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848169707] [2024-05-12 11:02:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:11,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:11,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848169707] [2024-05-12 11:02:11,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848169707] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:11,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115516715] [2024-05-12 11:02:11,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:02:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:11,556 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:02:11,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-05-12 11:02:11,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-05-12 11:02:11,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:11,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:02:11,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:11,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115516715] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:12,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:12,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-05-12 11:02:12,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625309551] [2024-05-12 11:02:12,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:12,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-05-12 11:02:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-05-12 11:02:12,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2024-05-12 11:02:12,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:02:12,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1964 transitions, 63648 flow. Second operand has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:12,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:12,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:02:12,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:20,882 INFO L124 PetriNetUnfolderBase]: 8810/14728 cut-off events. [2024-05-12 11:02:20,882 INFO L125 PetriNetUnfolderBase]: For 723393/723433 co-relation queries the response was YES. [2024-05-12 11:02:21,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192336 conditions, 14728 events. 8810/14728 cut-off events. For 723393/723433 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 105007 event pairs, 1213 based on Foata normal form. 110/14816 useless extension candidates. Maximal degree in co-relation 192194. Up to 5836 conditions per place. [2024-05-12 11:02:21,215 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 1110 selfloop transitions, 1124 changer transitions 0/2289 dead transitions. [2024-05-12 11:02:21,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 2289 transitions, 76959 flow [2024-05-12 11:02:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-05-12 11:02:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-05-12 11:02:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 281 transitions. [2024-05-12 11:02:21,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716931216931217 [2024-05-12 11:02:21,217 INFO L175 Difference]: Start difference. First operand has 407 places, 1964 transitions, 63648 flow. Second operand 27 states and 281 transitions. [2024-05-12 11:02:21,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 2289 transitions, 76959 flow [2024-05-12 11:02:43,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2289 transitions, 75027 flow, removed 830 selfloop flow, removed 12 redundant places. [2024-05-12 11:02:43,962 INFO L231 Difference]: Finished difference. Result has 439 places, 2154 transitions, 72897 flow [2024-05-12 11:02:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=62161, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=72897, PETRI_PLACES=439, PETRI_TRANSITIONS=2154} [2024-05-12 11:02:43,964 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 409 predicate places. [2024-05-12 11:02:43,965 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 2154 transitions, 72897 flow [2024-05-12 11:02:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.052631578947368) internal successors, (134), 19 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:43,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:43,965 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] [2024-05-12 11:02:43,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-05-12 11:02:44,175 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,SelfDestructingSolverStorable14 [2024-05-12 11:02:44,176 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:44,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1738561638, now seen corresponding path program 13 times [2024-05-12 11:02:44,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516372715] [2024-05-12 11:02:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:44,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516372715] [2024-05-12 11:02:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516372715] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137664521] [2024-05-12 11:02:44,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:02:44,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:44,337 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:02:44,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-05-12 11:02:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:44,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:02:44,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:44,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:44,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137664521] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:44,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2024-05-12 11:02:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920394136] [2024-05-12 11:02:44,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:44,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 11:02:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 11:02:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-05-12 11:02:44,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:02:44,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 2154 transitions, 72897 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 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) [2024-05-12 11:02:44,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:44,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:02:44,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:54,426 INFO L124 PetriNetUnfolderBase]: 8839/14790 cut-off events. [2024-05-12 11:02:54,427 INFO L125 PetriNetUnfolderBase]: For 699042/699088 co-relation queries the response was YES. [2024-05-12 11:02:54,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197979 conditions, 14790 events. 8839/14790 cut-off events. For 699042/699088 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 105881 event pairs, 1351 based on Foata normal form. 51/14822 useless extension candidates. Maximal degree in co-relation 197825. Up to 6770 conditions per place. [2024-05-12 11:02:54,702 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 739 selfloop transitions, 1456 changer transitions 3/2253 dead transitions. [2024-05-12 11:02:54,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 2253 transitions, 79207 flow [2024-05-12 11:02:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-05-12 11:02:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-05-12 11:02:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 208 transitions. [2024-05-12 11:02:54,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-05-12 11:02:54,704 INFO L175 Difference]: Start difference. First operand has 439 places, 2154 transitions, 72897 flow. Second operand 20 states and 208 transitions. [2024-05-12 11:02:54,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 2253 transitions, 79207 flow [2024-05-12 11:03:18,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2253 transitions, 78755 flow, removed 140 selfloop flow, removed 3 redundant places. [2024-05-12 11:03:18,245 INFO L231 Difference]: Finished difference. Result has 461 places, 2198 transitions, 79320 flow [2024-05-12 11:03:18,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=72389, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=79320, PETRI_PLACES=461, PETRI_TRANSITIONS=2198} [2024-05-12 11:03:18,247 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2024-05-12 11:03:18,247 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2198 transitions, 79320 flow [2024-05-12 11:03:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 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) [2024-05-12 11:03:18,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:18,247 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] [2024-05-12 11:03:18,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:18,458 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,SelfDestructingSolverStorable15 [2024-05-12 11:03:18,459 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:03:18,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1189860224, now seen corresponding path program 14 times [2024-05-12 11:03:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:18,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894862760] [2024-05-12 11:03:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:18,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894862760] [2024-05-12 11:03:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894862760] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:18,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901732619] [2024-05-12 11:03:18,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:03:18,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:18,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:18,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:18,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-05-12 11:03:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:03:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:18,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:03:18,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:18,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:19,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901732619] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:19,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:19,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-05-12 11:03:19,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734655067] [2024-05-12 11:03:19,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:19,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-05-12 11:03:19,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-05-12 11:03:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-05-12 11:03:19,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2024-05-12 11:03:19,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2198 transitions, 79320 flow. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:03:19,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:19,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2024-05-12 11:03:19,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:30,150 INFO L124 PetriNetUnfolderBase]: 8969/14982 cut-off events. [2024-05-12 11:03:30,150 INFO L125 PetriNetUnfolderBase]: For 809009/809055 co-relation queries the response was YES. [2024-05-12 11:03:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211967 conditions, 14982 events. 8969/14982 cut-off events. For 809009/809055 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 107100 event pairs, 1975 based on Foata normal form. 36/14999 useless extension candidates. Maximal degree in co-relation 211808. Up to 8772 conditions per place. [2024-05-12 11:03:30,486 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 1178 selfloop transitions, 1019 changer transitions 6/2258 dead transitions. [2024-05-12 11:03:30,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 2258 transitions, 85202 flow [2024-05-12 11:03:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 11:03:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 11:03:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-05-12 11:03:30,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2024-05-12 11:03:30,488 INFO L175 Difference]: Start difference. First operand has 461 places, 2198 transitions, 79320 flow. Second operand 13 states and 133 transitions. [2024-05-12 11:03:30,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 2258 transitions, 85202 flow [2024-05-12 11:03:57,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 2258 transitions, 84454 flow, removed 206 selfloop flow, removed 12 redundant places. [2024-05-12 11:03:57,875 INFO L231 Difference]: Finished difference. Result has 461 places, 2223 transitions, 83476 flow [2024-05-12 11:03:57,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78460, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=988, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=83476, PETRI_PLACES=461, PETRI_TRANSITIONS=2223} [2024-05-12 11:03:57,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 431 predicate places. [2024-05-12 11:03:57,877 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2223 transitions, 83476 flow [2024-05-12 11:03:57,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:03:57,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:57,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:03:57,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:58,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:58,090 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:03:58,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1231061144, now seen corresponding path program 15 times [2024-05-12 11:03:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:58,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830681974] [2024-05-12 11:03:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:58,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:03:58,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830681974] [2024-05-12 11:03:58,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830681974] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130948761] [2024-05-12 11:03:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:03:58,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:58,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:58,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:58,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-05-12 11:03:58,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 11:03:58,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:58,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:03:58,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:58,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:03:58,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130948761] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:58,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:58,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-05-12 11:03:58,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870750426] [2024-05-12 11:03:58,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-05-12 11:03:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-05-12 11:03:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-05-12 11:03:58,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-05-12 11:03:58,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2223 transitions, 83476 flow. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:03:58,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:58,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-05-12 11:03:58,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:12,036 INFO L124 PetriNetUnfolderBase]: 9237/15343 cut-off events. [2024-05-12 11:04:12,036 INFO L125 PetriNetUnfolderBase]: For 924298/924298 co-relation queries the response was YES. [2024-05-12 11:04:12,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226171 conditions, 15343 events. 9237/15343 cut-off events. For 924298/924298 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 109135 event pairs, 47 based on Foata normal form. 117/15453 useless extension candidates. Maximal degree in co-relation 226011. Up to 5085 conditions per place. [2024-05-12 11:04:12,420 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 1094 selfloop transitions, 1112 changer transitions 88/2660 dead transitions. [2024-05-12 11:04:12,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2660 transitions, 103566 flow [2024-05-12 11:04:12,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 11:04:12,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 11:04:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 176 transitions. [2024-05-12 11:04:12,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-05-12 11:04:12,422 INFO L175 Difference]: Start difference. First operand has 461 places, 2223 transitions, 83476 flow. Second operand 13 states and 176 transitions. [2024-05-12 11:04:12,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2660 transitions, 103566 flow [2024-05-12 11:04:40,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 2660 transitions, 103344 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 11:04:40,246 INFO L231 Difference]: Finished difference. Result has 470 places, 2376 transitions, 94939 flow [2024-05-12 11:04:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=83122, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=961, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=94939, PETRI_PLACES=470, PETRI_TRANSITIONS=2376} [2024-05-12 11:04:40,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 440 predicate places. [2024-05-12 11:04:40,248 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 2376 transitions, 94939 flow [2024-05-12 11:04:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:40,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:40,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:40,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:40,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-05-12 11:04:40,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:04:40,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash -570839010, now seen corresponding path program 16 times [2024-05-12 11:04:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880184199] [2024-05-12 11:04:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880184199] [2024-05-12 11:04:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880184199] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127087793] [2024-05-12 11:04:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:04:40,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:40,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:40,801 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) [2024-05-12 11:04:40,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-05-12 11:04:40,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:04:40,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:40,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 11:04:40,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:52,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:05:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:06,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127087793] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:05:06,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:05:06,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2024-05-12 11:05:06,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771568527] [2024-05-12 11:05:06,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:05:06,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-05-12 11:05:06,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:05:06,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-05-12 11:05:06,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=316, Unknown=3, NotChecked=0, Total=420 [2024-05-12 11:05:06,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:05:06,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 2376 transitions, 94939 flow. Second operand has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 21 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:05:06,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:05:06,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:05:06,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:05:32,666 INFO L124 PetriNetUnfolderBase]: 14922/24402 cut-off events. [2024-05-12 11:05:32,666 INFO L125 PetriNetUnfolderBase]: For 1479824/1479824 co-relation queries the response was YES. [2024-05-12 11:05:33,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363153 conditions, 24402 events. 14922/24402 cut-off events. For 1479824/1479824 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 179085 event pairs, 55 based on Foata normal form. 6/24408 useless extension candidates. Maximal degree in co-relation 362988. Up to 6554 conditions per place. [2024-05-12 11:05:33,519 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 2014 selfloop transitions, 1710 changer transitions 325/4050 dead transitions. [2024-05-12 11:05:33,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 4050 transitions, 165779 flow [2024-05-12 11:05:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-05-12 11:05:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-05-12 11:05:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 339 transitions. [2024-05-12 11:05:33,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-05-12 11:05:33,533 INFO L175 Difference]: Start difference. First operand has 470 places, 2376 transitions, 94939 flow. Second operand 30 states and 339 transitions. [2024-05-12 11:05:33,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 4050 transitions, 165779 flow [2024-05-12 11:06:28,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 4050 transitions, 164830 flow, removed 380 selfloop flow, removed 4 redundant places. [2024-05-12 11:06:28,298 INFO L231 Difference]: Finished difference. Result has 515 places, 3026 transitions, 130858 flow [2024-05-12 11:06:28,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=94438, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=130858, PETRI_PLACES=515, PETRI_TRANSITIONS=3026} [2024-05-12 11:06:28,301 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 485 predicate places. [2024-05-12 11:06:28,302 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 3026 transitions, 130858 flow [2024-05-12 11:06:28,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 21 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:28,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:28,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:06:28,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-05-12 11:06:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:06:28,517 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:06:28,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1107728292, now seen corresponding path program 17 times [2024-05-12 11:06:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:28,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358219901] [2024-05-12 11:06:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:28,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358219901] [2024-05-12 11:06:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358219901] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:06:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404095135] [2024-05-12 11:06:28,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:06:28,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:06:28,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:06:28,799 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) [2024-05-12 11:06:28,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-05-12 11:06:28,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:06:28,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:06:28,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2024-05-12 11:06:28,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:06:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:06:29,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:06:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404095135] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:06:29,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:06:29,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2024-05-12 11:06:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100760859] [2024-05-12 11:06:29,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:06:29,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-05-12 11:06:29,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-05-12 11:06:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-05-12 11:06:29,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:06:29,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 3026 transitions, 130858 flow. Second operand has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:06:29,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:29,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:06:29,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:40,075 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 76 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-05-12 11:06:42,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-05-12 11:06:56,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-05-12 11:07:11,684 WARN L293 SmtUtils]: Spent 14.34s on a formula simplification. DAG size of input: 61 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-05-12 11:07:59,287 INFO L124 PetriNetUnfolderBase]: 25184/41201 cut-off events. [2024-05-12 11:07:59,287 INFO L125 PetriNetUnfolderBase]: For 2898333/2898333 co-relation queries the response was YES. [2024-05-12 11:08:00,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650480 conditions, 41201 events. 25184/41201 cut-off events. For 2898333/2898333 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 320258 event pairs, 93 based on Foata normal form. 184/41385 useless extension candidates. Maximal degree in co-relation 650296. Up to 13693 conditions per place. [2024-05-12 11:08:00,732 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 1689 selfloop transitions, 3952 changer transitions 40/5682 dead transitions. [2024-05-12 11:08:00,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 5682 transitions, 254989 flow [2024-05-12 11:08:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-05-12 11:08:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-05-12 11:08:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 560 transitions. [2024-05-12 11:08:00,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-05-12 11:08:00,734 INFO L175 Difference]: Start difference. First operand has 515 places, 3026 transitions, 130858 flow. Second operand 60 states and 560 transitions. [2024-05-12 11:08:00,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 5682 transitions, 254989 flow