./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.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/test-context1.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/test-context1.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/test-context1.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 11:04:24,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:04:24,657 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:04:24,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:04:24,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:04:24,685 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:04:24,685 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:04:24,685 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:04:24,686 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:04:24,689 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:04:24,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:04:24,689 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:04:24,690 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:04:24,691 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:04:24,691 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:04:24,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:04:24,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:04:24,692 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:04:24,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:04:24,692 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:04:24,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:04:24,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:04:24,693 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:04:24,693 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:04:24,693 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:04:24,694 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:04:24,694 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:04:24,694 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:04:24,694 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:04:24,695 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:04:24,695 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:04:24,695 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:04:24,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:04:24,696 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:04:24,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:04:24,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:04:24,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:04:24,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:04:24,697 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:04:24,697 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:04:24,697 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:04:24,697 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:04:24,697 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:04:24,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:04:24,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:04:24,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:04:24,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:04:24,919 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:04:24,920 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:04:24,920 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/test-context1.wvr.yml/witness.yml [2024-05-12 11:04:25,027 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:04:25,028 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:04:25,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-05-12 11:04:26,046 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:04:26,195 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:04:26,196 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-05-12 11:04:26,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9387e8894/6bd1000a78d04739ad4203df0f2ba4de/FLAG777559f13 [2024-05-12 11:04:26,216 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9387e8894/6bd1000a78d04739ad4203df0f2ba4de [2024-05-12 11:04:26,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:04:26,218 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:04:26,221 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:04:26,221 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:04:26,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:04:26,225 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:04:25" (1/2) ... [2024-05-12 11:04:26,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50892299 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:04:26, skipping insertion in model container [2024-05-12 11:04:26,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:04:25" (1/2) ... [2024-05-12 11:04:26,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@281e26e7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:04:26, skipping insertion in model container [2024-05-12 11:04:26,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:04:26" (2/2) ... [2024-05-12 11:04:26,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50892299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26, skipping insertion in model container [2024-05-12 11:04:26,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:04:26" (2/2) ... [2024-05-12 11:04:26,230 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:04:26,247 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:04:26,248 INFO L97 edCorrectnessWitness]: Location invariant before [L80-L80] ((! multithreaded || 0 <= front) && (! multithreaded || ((2147483648LL + (long long )front) + (long long )n >= 0LL && (2147483647LL + (long long )front) - (long long )n >= 0LL))) && (! multithreaded || 0 <= front) [2024-05-12 11:04:26,248 INFO L97 edCorrectnessWitness]: Location invariant before [L81-L81] ((! multithreaded || 0 <= front) && (! multithreaded || ((2147483648LL + (long long )front) + (long long )n >= 0LL && (2147483647LL + (long long )front) - (long long )n >= 0LL))) && (! multithreaded || 0 <= front) [2024-05-12 11:04:26,249 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:04:26,249 INFO L106 edCorrectnessWitness]: ghost_update [L79-L79] multithreaded = 1; [2024-05-12 11:04:26,267 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:04:26,427 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/test-context1.wvr.c[2433,2446] [2024-05-12 11:04:26,437 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:04:26,443 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 11:04:26,489 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/test-context1.wvr.c[2433,2446] [2024-05-12 11:04:26,492 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:04:26,504 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:04:26,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26 WrapperNode [2024-05-12 11:04:26,504 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:04:26,505 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:04:26,505 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:04:26,505 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:04:26,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,515 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,532 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 140 [2024-05-12 11:04:26,532 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:04:26,533 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:04:26,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:04:26,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:04:26,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,551 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,562 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 11:04:26,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:04:26,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:04:26,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:04:26,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:04:26,588 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (1/1) ... [2024-05-12 11:04:26,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:04:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:26,611 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 11:04:26,632 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 11:04:26,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:04:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 11:04:26,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 11:04:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 11:04:26,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 11:04:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:04:26,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 11:04:26,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:04:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:04:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 11:04:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:04:26,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:04:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 11:04:26,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 11:04:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 11:04:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 11:04:26,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:04:26,658 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 11:04:26,744 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:04:26,745 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:04:27,020 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:04:27,020 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:04:27,222 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:04:27,223 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-05-12 11:04:27,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:04:27 BoogieIcfgContainer [2024-05-12 11:04:27,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:04:27,226 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:04:27,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:04:27,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:04:27,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:04:25" (1/4) ... [2024-05-12 11:04:27,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11614e9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:04:27, skipping insertion in model container [2024-05-12 11:04:27,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:04:26" (2/4) ... [2024-05-12 11:04:27,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11614e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:04:27, skipping insertion in model container [2024-05-12 11:04:27,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:26" (3/4) ... [2024-05-12 11:04:27,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11614e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:04:27, skipping insertion in model container [2024-05-12 11:04:27,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:04:27" (4/4) ... [2024-05-12 11:04:27,233 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-05-12 11:04:27,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:04:27,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 11:04:27,246 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:04:27,291 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 11:04:27,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 80 flow [2024-05-12 11:04:27,360 INFO L124 PetriNetUnfolderBase]: 5/31 cut-off events. [2024-05-12 11:04:27,362 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 11:04:27,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 5/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-05-12 11:04:27,366 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 80 flow [2024-05-12 11:04:27,370 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 72 flow [2024-05-12 11:04:27,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:04:27,385 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;@5a629eea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:04:27,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 11:04:27,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:04:27,392 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-05-12 11:04:27,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:04:27,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:27,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:27,394 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 11:04:27,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash 934804022, now seen corresponding path program 1 times [2024-05-12 11:04:27,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:27,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039697924] [2024-05-12 11:04:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:27,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:27,801 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 11:04:27,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039697924] [2024-05-12 11:04:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039697924] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:27,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:27,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 11:04:27,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421041913] [2024-05-12 11:04:27,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:27,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:04:27,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:27,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:04:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:04:27,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:04:27,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 11:04:27,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:27,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:04:27,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:27,989 INFO L124 PetriNetUnfolderBase]: 222/390 cut-off events. [2024-05-12 11:04:27,989 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-05-12 11:04:27,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 390 events. 222/390 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1610 event pairs, 84 based on Foata normal form. 63/368 useless extension candidates. Maximal degree in co-relation 680. Up to 209 conditions per place. [2024-05-12 11:04:27,993 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 36 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-05-12 11:04:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 176 flow [2024-05-12 11:04:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:04:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:04:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-05-12 11:04:28,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-05-12 11:04:28,005 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 59 transitions. [2024-05-12 11:04:28,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 176 flow [2024-05-12 11:04:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 11:04:28,009 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 70 flow [2024-05-12 11:04:28,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-05-12 11:04:28,013 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2024-05-12 11:04:28,013 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 70 flow [2024-05-12 11:04:28,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 11:04:28,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:28,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:28,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:04:28,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:04:28,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1214223962, now seen corresponding path program 1 times [2024-05-12 11:04:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358941088] [2024-05-12 11:04:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:28,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:28,089 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 11:04:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358941088] [2024-05-12 11:04:28,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358941088] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:28,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:28,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 11:04:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750260445] [2024-05-12 11:04:28,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:28,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:04:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:04:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:04:28,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:28,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:28,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:28,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:28,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:28,194 INFO L124 PetriNetUnfolderBase]: 280/520 cut-off events. [2024-05-12 11:04:28,195 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-05-12 11:04:28,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 520 events. 280/520 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2350 event pairs, 116 based on Foata normal form. 14/440 useless extension candidates. Maximal degree in co-relation 664. Up to 336 conditions per place. [2024-05-12 11:04:28,201 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 38 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2024-05-12 11:04:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 44 transitions, 185 flow [2024-05-12 11:04:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:04:28,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:04:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-05-12 11:04:28,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2024-05-12 11:04:28,206 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 70 flow. Second operand 3 states and 61 transitions. [2024-05-12 11:04:28,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 44 transitions, 185 flow [2024-05-12 11:04:28,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 44 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:28,213 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 80 flow [2024-05-12 11:04:28,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-05-12 11:04:28,214 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-05-12 11:04:28,214 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 80 flow [2024-05-12 11:04:28,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:28,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:28,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:28,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 11:04:28,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:04:28,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash -875419486, now seen corresponding path program 1 times [2024-05-12 11:04:28,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:28,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733554280] [2024-05-12 11:04:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:28,425 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 11:04:28,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733554280] [2024-05-12 11:04:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733554280] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:28,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:04:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268667973] [2024-05-12 11:04:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:04:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:04:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 11:04:28,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:28,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 11:04:28,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:28,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:28,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:28,545 INFO L124 PetriNetUnfolderBase]: 352/665 cut-off events. [2024-05-12 11:04:28,545 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-05-12 11:04:28,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 665 events. 352/665 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3284 event pairs, 306 based on Foata normal form. 15/556 useless extension candidates. Maximal degree in co-relation 1004. Up to 483 conditions per place. [2024-05-12 11:04:28,549 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 40 selfloop transitions, 3 changer transitions 2/49 dead transitions. [2024-05-12 11:04:28,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 49 transitions, 214 flow [2024-05-12 11:04:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:04:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:04:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-05-12 11:04:28,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-05-12 11:04:28,551 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 80 flow. Second operand 4 states and 72 transitions. [2024-05-12 11:04:28,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 49 transitions, 214 flow [2024-05-12 11:04:28,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:28,553 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2024-05-12 11:04:28,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-05-12 11:04:28,554 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-05-12 11:04:28,554 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2024-05-12 11:04:28,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 11:04:28,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:28,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:28,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:04:28,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:04:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1865149654, now seen corresponding path program 1 times [2024-05-12 11:04:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:28,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650700134] [2024-05-12 11:04:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:28,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:28,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650700134] [2024-05-12 11:04:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650700134] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:28,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639871407] [2024-05-12 11:04:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:28,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:28,709 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 11:04:28,769 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 11:04:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:28,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:04:28,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:29,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639871407] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:29,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 11:04:29,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 10 [2024-05-12 11:04:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805297022] [2024-05-12 11:04:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:04:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:04:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-05-12 11:04:29,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:04:29,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 11:04:29,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:29,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:04:29,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:29,299 INFO L124 PetriNetUnfolderBase]: 348/655 cut-off events. [2024-05-12 11:04:29,299 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-05-12 11:04:29,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 655 events. 348/655 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3255 event pairs, 306 based on Foata normal form. 16/546 useless extension candidates. Maximal degree in co-relation 1090. Up to 624 conditions per place. [2024-05-12 11:04:29,302 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2024-05-12 11:04:29,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 148 flow [2024-05-12 11:04:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:04:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:04:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-05-12 11:04:29,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-05-12 11:04:29,304 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 3 states and 39 transitions. [2024-05-12 11:04:29,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 148 flow [2024-05-12 11:04:29,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 144 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:29,305 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 92 flow [2024-05-12 11:04:29,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2024-05-12 11:04:29,306 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-05-12 11:04:29,306 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 92 flow [2024-05-12 11:04:29,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 11:04:29,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:29,306 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 11:04:29,331 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 11:04:29,518 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 11:04:29,519 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 11:04:29,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1616220155, now seen corresponding path program 1 times [2024-05-12 11:04:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:29,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185340605] [2024-05-12 11:04:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:29,547 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 11:04:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185340605] [2024-05-12 11:04:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185340605] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:29,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:29,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 11:04:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128254343] [2024-05-12 11:04:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:29,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:04:29,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:04:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:04:29,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:29,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 11:04:29,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:29,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:29,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:29,619 INFO L124 PetriNetUnfolderBase]: 348/653 cut-off events. [2024-05-12 11:04:29,619 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-05-12 11:04:29,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 653 events. 348/653 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3238 event pairs, 230 based on Foata normal form. 3/532 useless extension candidates. Maximal degree in co-relation 1389. Up to 461 conditions per place. [2024-05-12 11:04:29,622 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 33 selfloop transitions, 2 changer transitions 4/42 dead transitions. [2024-05-12 11:04:29,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 198 flow [2024-05-12 11:04:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:04:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:04:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-05-12 11:04:29,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-05-12 11:04:29,623 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 92 flow. Second operand 3 states and 58 transitions. [2024-05-12 11:04:29,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 198 flow [2024-05-12 11:04:29,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:29,625 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 93 flow [2024-05-12 11:04:29,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-05-12 11:04:29,626 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-05-12 11:04:29,626 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 93 flow [2024-05-12 11:04:29,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 11:04:29,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:29,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:29,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 11:04:29,627 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 11:04:29,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash 833645641, now seen corresponding path program 1 times [2024-05-12 11:04:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:29,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061859985] [2024-05-12 11:04:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:29,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:29,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:29,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061859985] [2024-05-12 11:04:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061859985] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440920394] [2024-05-12 11:04:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:29,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:29,789 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 11:04:29,832 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 11:04:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:29,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:04:29,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:29,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:29,984 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:29,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-05-12 11:04:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:30,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440920394] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:30,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:30,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-05-12 11:04:30,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336707499] [2024-05-12 11:04:30,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:30,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:04:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:04:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:04:30,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:30,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 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 11:04:30,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:30,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:30,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:30,166 INFO L124 PetriNetUnfolderBase]: 364/670 cut-off events. [2024-05-12 11:04:30,167 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-05-12 11:04:30,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1470 conditions, 670 events. 364/670 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3066 event pairs, 72 based on Foata normal form. 1/555 useless extension candidates. Maximal degree in co-relation 1455. Up to 170 conditions per place. [2024-05-12 11:04:30,170 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 47 selfloop transitions, 5 changer transitions 13/68 dead transitions. [2024-05-12 11:04:30,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 314 flow [2024-05-12 11:04:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:04:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:04:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-05-12 11:04:30,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2024-05-12 11:04:30,172 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 93 flow. Second operand 6 states and 107 transitions. [2024-05-12 11:04:30,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 314 flow [2024-05-12 11:04:30,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 308 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 11:04:30,176 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 107 flow [2024-05-12 11:04:30,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=107, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-05-12 11:04:30,178 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2024-05-12 11:04:30,178 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 107 flow [2024-05-12 11:04:30,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 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 11:04:30,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:30,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:30,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:30,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-05-12 11:04:30,391 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 11:04:30,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -232243491, now seen corresponding path program 2 times [2024-05-12 11:04:30,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872135370] [2024-05-12 11:04:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:30,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872135370] [2024-05-12 11:04:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872135370] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823307519] [2024-05-12 11:04:30,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:30,463 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 11:04:30,500 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 11:04:30,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:04:30,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:30,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:04:30,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:30,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:30,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823307519] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:30,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:30,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2024-05-12 11:04:30,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451045030] [2024-05-12 11:04:30,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:30,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 11:04:30,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:30,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 11:04:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-05-12 11:04:30,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:04:30,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 107 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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 11:04:30,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:30,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:04:30,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:31,021 INFO L124 PetriNetUnfolderBase]: 1037/1917 cut-off events. [2024-05-12 11:04:31,021 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-05-12 11:04:31,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4242 conditions, 1917 events. 1037/1917 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11243 event pairs, 362 based on Foata normal form. 54/1639 useless extension candidates. Maximal degree in co-relation 4227. Up to 500 conditions per place. [2024-05-12 11:04:31,026 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 54 selfloop transitions, 9 changer transitions 46/112 dead transitions. [2024-05-12 11:04:31,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 112 transitions, 553 flow [2024-05-12 11:04:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:04:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:04:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-05-12 11:04:31,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117845117845118 [2024-05-12 11:04:31,028 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 107 flow. Second operand 9 states and 152 transitions. [2024-05-12 11:04:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 112 transitions, 553 flow [2024-05-12 11:04:31,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 112 transitions, 536 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 11:04:31,031 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 180 flow [2024-05-12 11:04:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=180, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-05-12 11:04:31,031 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2024-05-12 11:04:31,032 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 180 flow [2024-05-12 11:04:31,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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 11:04:31,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:31,032 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:31,053 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 11:04:31,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:31,244 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 11:04:31,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash 497229997, now seen corresponding path program 3 times [2024-05-12 11:04:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498169226] [2024-05-12 11:04:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:31,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498169226] [2024-05-12 11:04:31,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498169226] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832698943] [2024-05-12 11:04:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:04:31,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:31,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:31,543 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 11:04:31,544 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 11:04:31,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 11:04:31,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:31,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2024-05-12 11:04:31,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:31,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:31,844 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:31,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-05-12 11:04:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832698943] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:32,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:32,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-05-12 11:04:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084685734] [2024-05-12 11:04:32,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:32,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-05-12 11:04:32,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:32,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-05-12 11:04:32,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-05-12 11:04:32,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:04:32,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 180 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:32,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:32,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:04:32,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:32,909 INFO L124 PetriNetUnfolderBase]: 2353/4307 cut-off events. [2024-05-12 11:04:32,909 INFO L125 PetriNetUnfolderBase]: For 3296/3296 co-relation queries the response was YES. [2024-05-12 11:04:32,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10450 conditions, 4307 events. 2353/4307 cut-off events. For 3296/3296 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 28685 event pairs, 336 based on Foata normal form. 7/3587 useless extension candidates. Maximal degree in co-relation 10432. Up to 566 conditions per place. [2024-05-12 11:04:32,925 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 167 selfloop transitions, 33 changer transitions 66/269 dead transitions. [2024-05-12 11:04:32,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 269 transitions, 1450 flow [2024-05-12 11:04:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-05-12 11:04:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-05-12 11:04:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 364 transitions. [2024-05-12 11:04:32,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013774104683195 [2024-05-12 11:04:32,927 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 180 flow. Second operand 22 states and 364 transitions. [2024-05-12 11:04:32,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 269 transitions, 1450 flow [2024-05-12 11:04:32,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 269 transitions, 1412 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 11:04:32,936 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 508 flow [2024-05-12 11:04:32,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=508, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-05-12 11:04:32,937 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2024-05-12 11:04:32,937 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 508 flow [2024-05-12 11:04:32,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:32,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:32,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:32,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:33,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:33,149 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 11:04:33,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2008475195, now seen corresponding path program 4 times [2024-05-12 11:04:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393445037] [2024-05-12 11:04:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:33,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393445037] [2024-05-12 11:04:33,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393445037] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:33,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263810943] [2024-05-12 11:04:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:04:33,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:33,453 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 11:04:33,478 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 11:04:33,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:04:33,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:33,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2024-05-12 11:04:33,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:33,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:33,759 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:33,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 11:04:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:33,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263810943] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:33,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:33,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 17 [2024-05-12 11:04:33,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825235558] [2024-05-12 11:04:33,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-05-12 11:04:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-05-12 11:04:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-05-12 11:04:33,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:33,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 508 flow. Second operand has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 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 11:04:33,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:33,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:33,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:34,659 INFO L124 PetriNetUnfolderBase]: 3321/6033 cut-off events. [2024-05-12 11:04:34,659 INFO L125 PetriNetUnfolderBase]: For 10479/10479 co-relation queries the response was YES. [2024-05-12 11:04:34,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16211 conditions, 6033 events. 3321/6033 cut-off events. For 10479/10479 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 41967 event pairs, 462 based on Foata normal form. 3/5019 useless extension candidates. Maximal degree in co-relation 16186. Up to 799 conditions per place. [2024-05-12 11:04:34,685 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 141 selfloop transitions, 41 changer transitions 40/225 dead transitions. [2024-05-12 11:04:34,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 225 transitions, 1556 flow [2024-05-12 11:04:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-05-12 11:04:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-05-12 11:04:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 300 transitions. [2024-05-12 11:04:34,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-05-12 11:04:34,687 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 508 flow. Second operand 16 states and 300 transitions. [2024-05-12 11:04:34,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 225 transitions, 1556 flow [2024-05-12 11:04:34,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 225 transitions, 1409 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-05-12 11:04:34,793 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 628 flow [2024-05-12 11:04:34,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=628, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-05-12 11:04:34,794 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2024-05-12 11:04:34,794 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 628 flow [2024-05-12 11:04:34,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 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 11:04:34,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:34,794 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:34,808 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 11:04:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:34,995 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 11:04:34,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash -672779759, now seen corresponding path program 5 times [2024-05-12 11:04:34,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:34,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731545821] [2024-05-12 11:04:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:35,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:35,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731545821] [2024-05-12 11:04:35,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731545821] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:35,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644330084] [2024-05-12 11:04:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:04:35,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:35,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:35,065 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 11:04:35,091 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 11:04:35,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:04:35,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:35,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 11:04:35,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 11:04:35,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 11:04:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644330084] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:35,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:35,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2024-05-12 11:04:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322734197] [2024-05-12 11:04:35,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:35,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 11:04:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 11:04:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 11:04:35,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:35,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 628 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 11:04:35,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:35,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:35,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:36,309 INFO L124 PetriNetUnfolderBase]: 6355/11385 cut-off events. [2024-05-12 11:04:36,309 INFO L125 PetriNetUnfolderBase]: For 20263/20263 co-relation queries the response was YES. [2024-05-12 11:04:36,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30374 conditions, 11385 events. 6355/11385 cut-off events. For 20263/20263 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 88040 event pairs, 1635 based on Foata normal form. 70/9518 useless extension candidates. Maximal degree in co-relation 30348. Up to 3756 conditions per place. [2024-05-12 11:04:36,358 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 97 selfloop transitions, 56 changer transitions 0/156 dead transitions. [2024-05-12 11:04:36,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 156 transitions, 1481 flow [2024-05-12 11:04:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:04:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:04:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-05-12 11:04:36,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6606060606060606 [2024-05-12 11:04:36,359 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 628 flow. Second operand 5 states and 109 transitions. [2024-05-12 11:04:36,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 156 transitions, 1481 flow [2024-05-12 11:04:36,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 156 transitions, 1219 flow, removed 72 selfloop flow, removed 13 redundant places. [2024-05-12 11:04:36,387 INFO L231 Difference]: Finished difference. Result has 78 places, 111 transitions, 1058 flow [2024-05-12 11:04:36,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1058, PETRI_PLACES=78, PETRI_TRANSITIONS=111} [2024-05-12 11:04:36,388 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 46 predicate places. [2024-05-12 11:04:36,388 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 111 transitions, 1058 flow [2024-05-12 11:04:36,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 11:04:36,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:36,388 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:36,412 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 11:04:36,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:36,600 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 11:04:36,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash -211061429, now seen corresponding path program 6 times [2024-05-12 11:04:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:36,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171428358] [2024-05-12 11:04:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:36,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171428358] [2024-05-12 11:04:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171428358] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996588161] [2024-05-12 11:04:36,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:04:36,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:36,834 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 11:04:36,854 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 11:04:36,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 11:04:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:36,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2024-05-12 11:04:37,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:37,221 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:37,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2024-05-12 11:04:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 11:04:37,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:37,355 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:37,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 11:04:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 11:04:37,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996588161] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:37,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:37,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-05-12 11:04:37,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356361542] [2024-05-12 11:04:37,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:37,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-05-12 11:04:37,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:37,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-05-12 11:04:37,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-05-12 11:04:37,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:04:37,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 111 transitions, 1058 flow. Second operand has 21 states, 21 states have (on average 8.19047619047619) internal successors, (172), 21 states have internal predecessors, (172), 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 11:04:37,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:37,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:04:37,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:38,674 INFO L124 PetriNetUnfolderBase]: 3985/7373 cut-off events. [2024-05-12 11:04:38,675 INFO L125 PetriNetUnfolderBase]: For 13880/13880 co-relation queries the response was YES. [2024-05-12 11:04:38,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19683 conditions, 7373 events. 3985/7373 cut-off events. For 13880/13880 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 53531 event pairs, 1512 based on Foata normal form. 100/6225 useless extension candidates. Maximal degree in co-relation 19657. Up to 4189 conditions per place. [2024-05-12 11:04:38,704 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 65 selfloop transitions, 9 changer transitions 87/164 dead transitions. [2024-05-12 11:04:38,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 164 transitions, 1273 flow [2024-05-12 11:04:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 11:04:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 11:04:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 179 transitions. [2024-05-12 11:04:38,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-05-12 11:04:38,706 INFO L175 Difference]: Start difference. First operand has 78 places, 111 transitions, 1058 flow. Second operand 12 states and 179 transitions. [2024-05-12 11:04:38,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 164 transitions, 1273 flow [2024-05-12 11:04:38,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 164 transitions, 1223 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:38,748 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 570 flow [2024-05-12 11:04:38,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=570, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-05-12 11:04:38,749 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2024-05-12 11:04:38,749 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 570 flow [2024-05-12 11:04:38,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.19047619047619) internal successors, (172), 21 states have internal predecessors, (172), 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 11:04:38,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:38,750 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:38,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:38,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:38,966 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 11:04:38,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1544487679, now seen corresponding path program 7 times [2024-05-12 11:04:38,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:38,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160073461] [2024-05-12 11:04:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:39,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160073461] [2024-05-12 11:04:39,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160073461] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:39,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344674852] [2024-05-12 11:04:39,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:04:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:39,457 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 11:04:39,463 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 11:04:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:39,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 16 conjunts are in the unsatisfiable core [2024-05-12 11:04:39,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:39,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:39,830 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:39,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 11:04:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:39,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344674852] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:39,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:39,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2024-05-12 11:04:39,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269976624] [2024-05-12 11:04:39,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:39,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:04:39,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:04:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:04:40,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:40,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 570 flow. Second operand has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 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 11:04:40,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:40,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:40,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:41,503 INFO L124 PetriNetUnfolderBase]: 4543/8159 cut-off events. [2024-05-12 11:04:41,503 INFO L125 PetriNetUnfolderBase]: For 11715/11715 co-relation queries the response was YES. [2024-05-12 11:04:41,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21569 conditions, 8159 events. 4543/8159 cut-off events. For 11715/11715 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 58873 event pairs, 303 based on Foata normal form. 20/6810 useless extension candidates. Maximal degree in co-relation 21539. Up to 1001 conditions per place. [2024-05-12 11:04:41,525 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 153 selfloop transitions, 64 changer transitions 86/306 dead transitions. [2024-05-12 11:04:41,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 306 transitions, 1954 flow [2024-05-12 11:04:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-05-12 11:04:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-05-12 11:04:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 447 transitions. [2024-05-12 11:04:41,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-05-12 11:04:41,527 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 570 flow. Second operand 24 states and 447 transitions. [2024-05-12 11:04:41,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 306 transitions, 1954 flow [2024-05-12 11:04:41,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 306 transitions, 1727 flow, removed 78 selfloop flow, removed 13 redundant places. [2024-05-12 11:04:41,563 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 864 flow [2024-05-12 11:04:41,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=864, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-05-12 11:04:41,564 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 65 predicate places. [2024-05-12 11:04:41,564 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 864 flow [2024-05-12 11:04:41,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 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 11:04:41,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:41,564 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:41,575 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 11:04:41,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-05-12 11:04:41,777 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 11:04:41,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1210377181, now seen corresponding path program 8 times [2024-05-12 11:04:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:41,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437146166] [2024-05-12 11:04:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:41,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 11:04:41,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437146166] [2024-05-12 11:04:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437146166] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911067100] [2024-05-12 11:04:41,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:41,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:41,951 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 11:04:41,952 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 11:04:42,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:04:42,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:42,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:04:42,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 11:04:42,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 11:04:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911067100] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:42,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:42,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-05-12 11:04:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526801127] [2024-05-12 11:04:42,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-05-12 11:04:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-05-12 11:04:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2024-05-12 11:04:42,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:04:42,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 864 flow. Second operand has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 26 states have internal predecessors, (215), 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 11:04:42,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:42,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:04:42,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:44,147 INFO L124 PetriNetUnfolderBase]: 8937/16419 cut-off events. [2024-05-12 11:04:44,148 INFO L125 PetriNetUnfolderBase]: For 22421/22421 co-relation queries the response was YES. [2024-05-12 11:04:44,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41458 conditions, 16419 events. 8937/16419 cut-off events. For 22421/22421 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 138691 event pairs, 5392 based on Foata normal form. 308/13941 useless extension candidates. Maximal degree in co-relation 41423. Up to 7560 conditions per place. [2024-05-12 11:04:44,198 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 80 selfloop transitions, 5 changer transitions 102/190 dead transitions. [2024-05-12 11:04:44,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 190 transitions, 1925 flow [2024-05-12 11:04:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:04:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:04:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-05-12 11:04:44,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2024-05-12 11:04:44,199 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 864 flow. Second operand 10 states and 136 transitions. [2024-05-12 11:04:44,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 190 transitions, 1925 flow [2024-05-12 11:04:44,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 190 transitions, 1681 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-05-12 11:04:44,282 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 829 flow [2024-05-12 11:04:44,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=829, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2024-05-12 11:04:44,283 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2024-05-12 11:04:44,283 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 829 flow [2024-05-12 11:04:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.26923076923077) internal successors, (215), 26 states have internal predecessors, (215), 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 11:04:44,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:44,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:44,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:44,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-05-12 11:04:44,495 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 11:04:44,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1719132527, now seen corresponding path program 9 times [2024-05-12 11:04:44,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:44,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127474038] [2024-05-12 11:04:44,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:44,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:04:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:44,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127474038] [2024-05-12 11:04:44,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127474038] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:44,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211415239] [2024-05-12 11:04:44,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:04:44,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:44,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:44,591 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 11:04:44,597 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 11:04:44,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 11:04:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:44,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2024-05-12 11:04:44,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:04:44,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:04:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211415239] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:44,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-05-12 11:04:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439651359] [2024-05-12 11:04:44,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:04:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:04:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:04:44,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:44,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 829 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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 11:04:44,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:44,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:44,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:46,170 INFO L124 PetriNetUnfolderBase]: 8486/15071 cut-off events. [2024-05-12 11:04:46,170 INFO L125 PetriNetUnfolderBase]: For 20791/20791 co-relation queries the response was YES. [2024-05-12 11:04:46,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38840 conditions, 15071 events. 8486/15071 cut-off events. For 20791/20791 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 119803 event pairs, 1627 based on Foata normal form. 28/12554 useless extension candidates. Maximal degree in co-relation 38802. Up to 3797 conditions per place. [2024-05-12 11:04:46,231 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 109 selfloop transitions, 83 changer transitions 0/195 dead transitions. [2024-05-12 11:04:46,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 195 transitions, 2030 flow [2024-05-12 11:04:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:04:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:04:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 11:04:46,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2024-05-12 11:04:46,233 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 829 flow. Second operand 6 states and 133 transitions. [2024-05-12 11:04:46,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 195 transitions, 2030 flow [2024-05-12 11:04:46,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 195 transitions, 1850 flow, removed 85 selfloop flow, removed 9 redundant places. [2024-05-12 11:04:46,387 INFO L231 Difference]: Finished difference. Result has 92 places, 135 transitions, 1451 flow [2024-05-12 11:04:46,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1451, PETRI_PLACES=92, PETRI_TRANSITIONS=135} [2024-05-12 11:04:46,388 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2024-05-12 11:04:46,388 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 135 transitions, 1451 flow [2024-05-12 11:04:46,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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 11:04:46,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:46,388 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:46,411 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 11:04:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-05-12 11:04:46,600 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 11:04:46,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash -563254901, now seen corresponding path program 10 times [2024-05-12 11:04:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536401882] [2024-05-12 11:04:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536401882] [2024-05-12 11:04:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536401882] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525182557] [2024-05-12 11:04:47,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:04:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:47,065 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 11:04:47,096 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 11:04:47,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:04:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:47,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2024-05-12 11:04:47,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:47,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:47,536 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:47,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-05-12 11:04:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 11:04:47,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525182557] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:47,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:47,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2024-05-12 11:04:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549883622] [2024-05-12 11:04:47,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:47,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-05-12 11:04:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-05-12 11:04:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2024-05-12 11:04:47,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:47,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 135 transitions, 1451 flow. Second operand has 36 states, 36 states have (on average 9.63888888888889) internal successors, (347), 36 states have internal predecessors, (347), 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 11:04:47,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:47,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:47,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:51,677 INFO L124 PetriNetUnfolderBase]: 14298/25589 cut-off events. [2024-05-12 11:04:51,678 INFO L125 PetriNetUnfolderBase]: For 38219/38219 co-relation queries the response was YES. [2024-05-12 11:04:51,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67753 conditions, 25589 events. 14298/25589 cut-off events. For 38219/38219 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 217693 event pairs, 875 based on Foata normal form. 16/21321 useless extension candidates. Maximal degree in co-relation 67718. Up to 3282 conditions per place. [2024-05-12 11:04:51,771 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 400 selfloop transitions, 197 changer transitions 129/729 dead transitions. [2024-05-12 11:04:51,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 729 transitions, 5501 flow [2024-05-12 11:04:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-05-12 11:04:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-05-12 11:04:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 953 transitions. [2024-05-12 11:04:51,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893630179344465 [2024-05-12 11:04:51,775 INFO L175 Difference]: Start difference. First operand has 92 places, 135 transitions, 1451 flow. Second operand 49 states and 953 transitions. [2024-05-12 11:04:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 729 transitions, 5501 flow [2024-05-12 11:04:51,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 729 transitions, 5361 flow, removed 70 selfloop flow, removed 0 redundant places. [2024-05-12 11:04:51,918 INFO L231 Difference]: Finished difference. Result has 157 places, 234 transitions, 2921 flow [2024-05-12 11:04:51,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2921, PETRI_PLACES=157, PETRI_TRANSITIONS=234} [2024-05-12 11:04:51,919 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 125 predicate places. [2024-05-12 11:04:51,920 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 234 transitions, 2921 flow [2024-05-12 11:04:51,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.63888888888889) internal successors, (347), 36 states have internal predecessors, (347), 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 11:04:51,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:51,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:51,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-05-12 11:04:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-05-12 11:04:52,132 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 11:04:52,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1686696389, now seen corresponding path program 11 times [2024-05-12 11:04:52,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669665045] [2024-05-12 11:04:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:52,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:52,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669665045] [2024-05-12 11:04:52,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669665045] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:52,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416403337] [2024-05-12 11:04:52,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:04:52,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:52,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:52,729 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 11:04:52,752 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 11:04:52,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-05-12 11:04:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:52,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2024-05-12 11:04:52,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:52,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-05-12 11:04:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:53,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:53,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-05-12 11:04:53,792 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:04:53,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 47 [2024-05-12 11:04:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:53,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416403337] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:53,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:53,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 38 [2024-05-12 11:04:53,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77192079] [2024-05-12 11:04:53,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:53,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-05-12 11:04:53,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-05-12 11:04:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2024-05-12 11:04:54,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-05-12 11:04:54,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 234 transitions, 2921 flow. Second operand has 39 states, 39 states have (on average 9.666666666666666) internal successors, (377), 39 states have internal predecessors, (377), 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 11:04:54,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:54,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-05-12 11:04:54,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:58,923 INFO L124 PetriNetUnfolderBase]: 16396/29525 cut-off events. [2024-05-12 11:04:58,923 INFO L125 PetriNetUnfolderBase]: For 63103/63103 co-relation queries the response was YES. [2024-05-12 11:04:59,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81270 conditions, 29525 events. 16396/29525 cut-off events. For 63103/63103 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 262217 event pairs, 5418 based on Foata normal form. 1/24618 useless extension candidates. Maximal degree in co-relation 81216. Up to 19063 conditions per place. [2024-05-12 11:04:59,097 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 424 selfloop transitions, 73 changer transitions 135/635 dead transitions. [2024-05-12 11:04:59,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 635 transitions, 5598 flow [2024-05-12 11:04:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-05-12 11:04:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-05-12 11:04:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 688 transitions. [2024-05-12 11:04:59,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634725634725635 [2024-05-12 11:04:59,099 INFO L175 Difference]: Start difference. First operand has 157 places, 234 transitions, 2921 flow. Second operand 37 states and 688 transitions. [2024-05-12 11:04:59,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 635 transitions, 5598 flow [2024-05-12 11:04:59,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 635 transitions, 5041 flow, removed 82 selfloop flow, removed 12 redundant places. [2024-05-12 11:04:59,422 INFO L231 Difference]: Finished difference. Result has 187 places, 261 transitions, 2958 flow [2024-05-12 11:04:59,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2958, PETRI_PLACES=187, PETRI_TRANSITIONS=261} [2024-05-12 11:04:59,423 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 155 predicate places. [2024-05-12 11:04:59,423 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 261 transitions, 2958 flow [2024-05-12 11:04:59,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.666666666666666) internal successors, (377), 39 states have internal predecessors, (377), 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 11:04:59,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:59,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:59,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-05-12 11:04:59,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-05-12 11:04:59,628 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 11:04:59,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:59,629 INFO L85 PathProgramCache]: Analyzing trace with hash 110018429, now seen corresponding path program 12 times [2024-05-12 11:04:59,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:59,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980234049] [2024-05-12 11:04:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:59,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:05:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:00,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:05:00,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980234049] [2024-05-12 11:05:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980234049] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:05:00,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110601633] [2024-05-12 11:05:00,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:05:00,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:05:00,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:05:00,028 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 11:05:00,054 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 11:05:00,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-05-12 11:05:00,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:05:00,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2024-05-12 11:05:00,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:05:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 11:05:00,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:05:00,635 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-05-12 11:05:00,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-05-12 11:05:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-05-12 11:05:00,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110601633] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:05:00,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:05:00,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2024-05-12 11:05:00,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249978321] [2024-05-12 11:05:00,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:05:00,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-05-12 11:05:00,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:05:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-05-12 11:05:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2024-05-12 11:05:00,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-05-12 11:05:00,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 261 transitions, 2958 flow. Second operand has 36 states, 36 states have (on average 7.666666666666667) internal successors, (276), 36 states have internal predecessors, (276), 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 11:05:00,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:05:00,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-05-12 11:05:00,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:05:21,941 INFO L124 PetriNetUnfolderBase]: 80279/143963 cut-off events. [2024-05-12 11:05:21,941 INFO L125 PetriNetUnfolderBase]: For 271193/271193 co-relation queries the response was YES. [2024-05-12 11:05:23,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376890 conditions, 143963 events. 80279/143963 cut-off events. For 271193/271193 co-relation queries the response was YES. Maximal size of possible extension queue 4320. Compared 1520670 event pairs, 16137 based on Foata normal form. 96/120052 useless extension candidates. Maximal degree in co-relation 376830. Up to 18700 conditions per place. [2024-05-12 11:05:23,646 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 906 selfloop transitions, 852 changer transitions 228/1989 dead transitions. [2024-05-12 11:05:23,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1989 transitions, 20014 flow [2024-05-12 11:05:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-05-12 11:05:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-05-12 11:05:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1194 transitions. [2024-05-12 11:05:23,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320855614973262 [2024-05-12 11:05:23,658 INFO L175 Difference]: Start difference. First operand has 187 places, 261 transitions, 2958 flow. Second operand 68 states and 1194 transitions. [2024-05-12 11:05:23,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1989 transitions, 20014 flow [2024-05-12 11:05:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 1989 transitions, 19786 flow, removed 49 selfloop flow, removed 17 redundant places. [2024-05-12 11:05:27,596 INFO L231 Difference]: Finished difference. Result has 266 places, 1046 transitions, 15290 flow [2024-05-12 11:05:27,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=15290, PETRI_PLACES=266, PETRI_TRANSITIONS=1046} [2024-05-12 11:05:27,597 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 234 predicate places. [2024-05-12 11:05:27,597 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 1046 transitions, 15290 flow [2024-05-12 11:05:27,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.666666666666667) internal successors, (276), 36 states have internal predecessors, (276), 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 11:05:27,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:05:27,598 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:05:27,609 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 11:05:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-05-12 11:05:27,803 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 11:05:27,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:05:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash 777325073, now seen corresponding path program 13 times [2024-05-12 11:05:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:05:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180153622] [2024-05-12 11:05:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:05:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:05:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:05:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-05-12 11:05:28,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:05:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180153622] [2024-05-12 11:05:28,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180153622] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:05:28,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255829055] [2024-05-12 11:05:28,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:05:28,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:05:28,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:05:28,002 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 11:05:28,004 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 11:05:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:05:28,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 11:05:28,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:05:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:05:28,206 INFO L327 TraceCheckSpWp]: Computing backward predicates...