./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-12.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/pthread/fib_unsafe-12.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-12.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-?-80b1b13-m [2024-01-31 17:29:18,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:29:18,276 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:29:18,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:29:18,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:29:18,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:29:18,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:29:18,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:29:18,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:29:18,326 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:29:18,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:29:18,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:29:18,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:29:18,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:29:18,328 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:29:18,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:29:18,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:29:18,329 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:29:18,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:29:18,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:29:18,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:29:18,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:29:18,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:29:18,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:29:18,330 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:29:18,330 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:29:18,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:29:18,331 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:29:18,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:29:18,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:29:18,332 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:29:18,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:29:18,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:29:18,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:29:18,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:29:18,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:29:18,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:29:18,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:29:18,334 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:29:18,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:29:18,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:29:18,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:29:18,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:29:18,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:29:18,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:29:18,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:29:18,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:29:18,559 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:29:18,559 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:29:18,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-12.yml/witness.yml [2024-01-31 17:29:18,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:29:18,704 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:29:18,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i [2024-01-31 17:29:19,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:29:19,903 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:29:19,906 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i [2024-01-31 17:29:19,919 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6c152ac/76b1451fc2a54edab374fb021403e5ed/FLAGdf0e00a58 [2024-01-31 17:29:19,928 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b6c152ac/76b1451fc2a54edab374fb021403e5ed [2024-01-31 17:29:19,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:29:19,930 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:29:19,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:29:19,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:29:19,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:29:19,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:18" (1/2) ... [2024-01-31 17:29:19,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53983fe1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:19, skipping insertion in model container [2024-01-31 17:29:19,935 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:18" (1/2) ... [2024-01-31 17:29:19,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ce48d76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:19, skipping insertion in model container [2024-01-31 17:29:19,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:29:19" (2/2) ... [2024-01-31 17:29:19,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53983fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:19, skipping insertion in model container [2024-01-31 17:29:19,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:29:19" (2/2) ... [2024-01-31 17:29:19,937 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:29:20,047 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:29:20,048 INFO L98 nessWitnessExtractor]: Location invariant before [L681-L681] expression == 0 [2024-01-31 17:29:20,048 INFO L98 nessWitnessExtractor]: Location invariant after [L722-L722] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-01-31 17:29:20,048 INFO L98 nessWitnessExtractor]: Location invariant after [L681-L681] expression == 1 [2024-01-31 17:29:20,049 INFO L98 nessWitnessExtractor]: Location invariant after [L724-L724] (((((1 <= i) && (1 <= j)) && (2 <= correct)) && (i <= 2147483646)) && (correct != 0)) && (assert_cond == (_Bool)0 || assert_cond == (_Bool)1) [2024-01-31 17:29:20,085 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:29:20,350 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i[30243,30256] [2024-01-31 17:29:20,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:29:20,373 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:29:20,409 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i[30243,30256] Start Parsing Local [2024-01-31 17:29:20,427 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry [2024-01-31 17:29:20,435 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:29:20,435 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:29:20,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:29:20,466 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:29:20,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20 WrapperNode [2024-01-31 17:29:20,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:29:20,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:29:20,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:29:20,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:29:20,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,484 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,499 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-01-31 17:29:20,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:29:20,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:29:20,501 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:29:20,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:29:20,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,515 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,524 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 17:29:20,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,540 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:29:20,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:29:20,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:29:20,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:29:20,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:29:20,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:20,569 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) [2024-01-31 17:29:20,571 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 [2024-01-31 17:29:20,599 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 17:29:20,599 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 17:29:20,599 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 17:29:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 17:29:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:29:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:29:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:29:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:29:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:29:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:29:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:29:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:29:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:29:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:29:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:29:20,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:29:20,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:29:20,605 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:29:20,699 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:29:20,701 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:29:20,846 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:29:20,847 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:29:20,966 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:29:20,966 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:29:20,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:29:20 BoogieIcfgContainer [2024-01-31 17:29:20,967 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:29:20,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:29:20,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:29:20,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:29:20,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:18" (1/4) ... [2024-01-31 17:29:20,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10420c23 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:29:19" (2/4) ... [2024-01-31 17:29:20,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10420c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20" (3/4) ... [2024-01-31 17:29:20,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10420c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:29:20" (4/4) ... [2024-01-31 17:29:20,988 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2024-01-31 17:29:21,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:29:21,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 17:29:21,031 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:29:21,069 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:29:21,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 17:29:21,128 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-31 17:29:21,130 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:29:21,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-01-31 17:29:21,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 17:29:21,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 29 transitions, 64 flow [2024-01-31 17:29:21,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:29:21,153 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;@694c0674, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:29:21,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:29:21,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:29:21,164 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 17:29:21,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:29:21,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:21,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:21,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799117, now seen corresponding path program 1 times [2024-01-31 17:29:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:21,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477264116] [2024-01-31 17:29:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:21,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477264116] [2024-01-31 17:29:21,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477264116] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:29:21,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:29:21,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:29:21,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270756212] [2024-01-31 17:29:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:29:21,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:29:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:29:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:29:21,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:21,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:21,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:21,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:21,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:21,472 INFO L124 PetriNetUnfolderBase]: 115/241 cut-off events. [2024-01-31 17:29:21,472 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 17:29:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 241 events. 115/241 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 824 event pairs, 20 based on Foata normal form. 9/218 useless extension candidates. Maximal degree in co-relation 416. Up to 118 conditions per place. [2024-01-31 17:29:21,475 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 20 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2024-01-31 17:29:21,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 122 flow [2024-01-31 17:29:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:29:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:29:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-31 17:29:21,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-01-31 17:29:21,484 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 67 transitions. [2024-01-31 17:29:21,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 122 flow [2024-01-31 17:29:21,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:29:21,488 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2024-01-31 17:29:21,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=70, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-01-31 17:29:21,491 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-01-31 17:29:21,492 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2024-01-31 17:29:21,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:21,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:29:21,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:21,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:21,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1697611135, now seen corresponding path program 1 times [2024-01-31 17:29:21,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:21,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488092533] [2024-01-31 17:29:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:21,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:21,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488092533] [2024-01-31 17:29:21,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488092533] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:21,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681994277] [2024-01-31 17:29:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:21,553 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) [2024-01-31 17:29:21,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:29:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:21,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:29:21,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:29:21,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:29:21,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681994277] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:29:21,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:29:21,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-01-31 17:29:21,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90913735] [2024-01-31 17:29:21,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:29:21,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:29:21,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:29:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:29:21,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-01-31 17:29:21,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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) [2024-01-31 17:29:21,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:21,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-01-31 17:29:21,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:21,751 INFO L124 PetriNetUnfolderBase]: 151/259 cut-off events. [2024-01-31 17:29:21,751 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:29:21,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 259 events. 151/259 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 709 event pairs, 68 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 524. Up to 178 conditions per place. [2024-01-31 17:29:21,753 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 23 selfloop transitions, 1 changer transitions 1/33 dead transitions. [2024-01-31 17:29:21,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 130 flow [2024-01-31 17:29:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:29:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:29:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 17:29:21,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-01-31 17:29:21,755 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-01-31 17:29:21,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 130 flow [2024-01-31 17:29:21,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:29:21,756 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 66 flow [2024-01-31 17:29:21,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-01-31 17:29:21,757 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-01-31 17:29:21,757 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 66 flow [2024-01-31 17:29:21,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 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) [2024-01-31 17:29:21,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:21,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:21,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:21,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1086337880, now seen corresponding path program 1 times [2024-01-31 17:29:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:21,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804979749] [2024-01-31 17:29:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:22,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804979749] [2024-01-31 17:29:22,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804979749] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:22,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564756962] [2024-01-31 17:29:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:22,052 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) [2024-01-31 17:29:22,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:29:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:29:22,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564756962] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:22,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:22,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 17:29:22,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395109542] [2024-01-31 17:29:22,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:22,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:29:22,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:22,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:29:22,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:29:22,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:22,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:22,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:22,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:22,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:22,245 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-31 17:29:22,245 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:29:22,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 771 event pairs, 20 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-01-31 17:29:22,250 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 17:29:22,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 212 flow [2024-01-31 17:29:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:29:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:29:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-01-31 17:29:22,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2024-01-31 17:29:22,254 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 66 flow. Second operand 6 states and 130 transitions. [2024-01-31 17:29:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 212 flow [2024-01-31 17:29:22,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:29:22,259 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 101 flow [2024-01-31 17:29:22,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2024-01-31 17:29:22,260 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-01-31 17:29:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 101 flow [2024-01-31 17:29:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:22,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:22,261 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:22,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:22,479 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,SelfDestructingSolverStorable2 [2024-01-31 17:29:22,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:22,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1699060964, now seen corresponding path program 2 times [2024-01-31 17:29:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:22,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295233025] [2024-01-31 17:29:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:22,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295233025] [2024-01-31 17:29:22,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295233025] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:22,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492664187] [2024-01-31 17:29:22,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:29:22,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:22,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:22,669 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) [2024-01-31 17:29:22,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:29:22,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:29:22,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:22,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:29:22,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492664187] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:22,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:22,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 17:29:22,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043659555] [2024-01-31 17:29:22,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:22,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:29:22,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:22,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:29:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:29:22,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:22,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 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) [2024-01-31 17:29:22,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:22,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:22,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:22,897 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-31 17:29:22,897 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-31 17:29:22,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1170 event pairs, 20 based on Foata normal form. 54/488 useless extension candidates. Maximal degree in co-relation 1100. Up to 109 conditions per place. [2024-01-31 17:29:22,899 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-31 17:29:22,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 427 flow [2024-01-31 17:29:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:29:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:29:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-01-31 17:29:22,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696236559139785 [2024-01-31 17:29:22,901 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 101 flow. Second operand 12 states and 259 transitions. [2024-01-31 17:29:22,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 427 flow [2024-01-31 17:29:22,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 95 transitions, 413 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 17:29:22,904 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 171 flow [2024-01-31 17:29:22,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=35} [2024-01-31 17:29:22,905 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-01-31 17:29:22,905 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 171 flow [2024-01-31 17:29:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.538461538461538) internal successors, (202), 13 states have internal predecessors, (202), 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) [2024-01-31 17:29:22,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:22,906 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:22,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:23,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:23,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:23,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1349105564, now seen corresponding path program 3 times [2024-01-31 17:29:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987027362] [2024-01-31 17:29:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:23,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987027362] [2024-01-31 17:29:23,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987027362] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:23,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906761911] [2024-01-31 17:29:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:29:23,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:23,296 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) [2024-01-31 17:29:23,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:29:23,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-31 17:29:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:23,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:29:23,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906761911] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:23,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:23,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-01-31 17:29:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293184073] [2024-01-31 17:29:23,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:29:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:29:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:29:23,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:23,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 35 transitions, 171 flow. Second operand has 25 states, 25 states have (on average 15.28) internal successors, (382), 25 states have internal predecessors, (382), 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) [2024-01-31 17:29:23,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:23,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:23,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:23,782 INFO L124 PetriNetUnfolderBase]: 475/763 cut-off events. [2024-01-31 17:29:23,782 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2024-01-31 17:29:23,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 763 events. 475/763 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1967 event pairs, 20 based on Foata normal form. 108/866 useless extension candidates. Maximal degree in co-relation 2225. Up to 190 conditions per place. [2024-01-31 17:29:23,786 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 146 selfloop transitions, 23 changer transitions 0/179 dead transitions. [2024-01-31 17:29:23,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 179 transitions, 869 flow [2024-01-31 17:29:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:29:23,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:29:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 517 transitions. [2024-01-31 17:29:23,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948924731182796 [2024-01-31 17:29:23,789 INFO L175 Difference]: Start difference. First operand has 54 places, 35 transitions, 171 flow. Second operand 24 states and 517 transitions. [2024-01-31 17:29:23,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 179 transitions, 869 flow [2024-01-31 17:29:23,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 797 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-01-31 17:29:23,797 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 291 flow [2024-01-31 17:29:23,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=291, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2024-01-31 17:29:23,813 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2024-01-31 17:29:23,813 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 291 flow [2024-01-31 17:29:23,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 15.28) internal successors, (382), 25 states have internal predecessors, (382), 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) [2024-01-31 17:29:23,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:23,813 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:23,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:24,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:24,025 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:24,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:24,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1405337444, now seen corresponding path program 4 times [2024-01-31 17:29:24,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:24,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689985438] [2024-01-31 17:29:24,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:24,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:24,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689985438] [2024-01-31 17:29:24,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689985438] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:24,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690561370] [2024-01-31 17:29:24,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:29:24,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:24,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:24,408 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) [2024-01-31 17:29:24,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:29:24,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:29:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:24,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:29:24,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690561370] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:24,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:24,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 29 [2024-01-31 17:29:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942335845] [2024-01-31 17:29:24,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:29:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:29:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2024-01-31 17:29:24,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:24,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 291 flow. Second operand has 29 states, 29 states have (on average 15.275862068965518) internal successors, (443), 29 states have internal predecessors, (443), 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) [2024-01-31 17:29:24,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:24,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:24,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:25,104 INFO L124 PetriNetUnfolderBase]: 547/871 cut-off events. [2024-01-31 17:29:25,105 INFO L125 PetriNetUnfolderBase]: For 9333/9333 co-relation queries the response was YES. [2024-01-31 17:29:25,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 871 events. 547/871 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2231 event pairs, 20 based on Foata normal form. 36/902 useless extension candidates. Maximal degree in co-relation 2657. Up to 184 conditions per place. [2024-01-31 17:29:25,110 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 170 selfloop transitions, 27 changer transitions 0/207 dead transitions. [2024-01-31 17:29:25,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 207 transitions, 1029 flow [2024-01-31 17:29:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:29:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:29:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 593 transitions. [2024-01-31 17:29:25,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6831797235023042 [2024-01-31 17:29:25,112 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 291 flow. Second operand 28 states and 593 transitions. [2024-01-31 17:29:25,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 207 transitions, 1029 flow [2024-01-31 17:29:25,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 207 transitions, 925 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-01-31 17:29:25,121 INFO L231 Difference]: Finished difference. Result has 104 places, 51 transitions, 291 flow [2024-01-31 17:29:25,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=291, PETRI_PLACES=104, PETRI_TRANSITIONS=51} [2024-01-31 17:29:25,122 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 72 predicate places. [2024-01-31 17:29:25,122 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 51 transitions, 291 flow [2024-01-31 17:29:25,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 15.275862068965518) internal successors, (443), 29 states have internal predecessors, (443), 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) [2024-01-31 17:29:25,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:25,123 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:25,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:25,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:25,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:29:25,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1550107548, now seen corresponding path program 5 times [2024-01-31 17:29:25,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:25,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770477271] [2024-01-31 17:29:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:25,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:27,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770477271] [2024-01-31 17:29:27,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770477271] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972370046] [2024-01-31 17:29:27,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:29:27,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:27,075 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) [2024-01-31 17:29:27,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:29:27,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-01-31 17:29:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:27,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 89 conjunts are in the unsatisfiable core [2024-01-31 17:29:27,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:28,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:30,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972370046] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:30,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 94 [2024-01-31 17:29:30,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879116036] [2024-01-31 17:29:30,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-01-31 17:29:30,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-01-31 17:29:30,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=7568, Unknown=0, NotChecked=0, Total=8930 [2024-01-31 17:29:30,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 17:29:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 51 transitions, 291 flow. Second operand has 95 states, 95 states have (on average 6.178947368421053) internal successors, (587), 95 states have internal predecessors, (587), 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) [2024-01-31 17:29:30,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:30,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 17:29:30,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:30:11,469 INFO L124 PetriNetUnfolderBase]: 40762/67483 cut-off events. [2024-01-31 17:30:11,470 INFO L125 PetriNetUnfolderBase]: For 265071/265071 co-relation queries the response was YES. [2024-01-31 17:30:11,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183529 conditions, 67483 events. 40762/67483 cut-off events. For 265071/265071 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 474090 event pairs, 124 based on Foata normal form. 549/68028 useless extension candidates. Maximal degree in co-relation 183485. Up to 8682 conditions per place. [2024-01-31 17:30:12,047 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 1073 selfloop transitions, 1691 changer transitions 761/3528 dead transitions. [2024-01-31 17:30:12,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 3528 transitions, 24482 flow [2024-01-31 17:30:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2024-01-31 17:30:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2024-01-31 17:30:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 3428 transitions. [2024-01-31 17:30:12,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388120839733743 [2024-01-31 17:30:12,065 INFO L175 Difference]: Start difference. First operand has 104 places, 51 transitions, 291 flow. Second operand 252 states and 3428 transitions. [2024-01-31 17:30:12,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 3528 transitions, 24482 flow [2024-01-31 17:30:12,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 3528 transitions, 20460 flow, removed 754 selfloop flow, removed 23 redundant places. [2024-01-31 17:30:12,345 INFO L231 Difference]: Finished difference. Result has 450 places, 1843 transitions, 11151 flow [2024-01-31 17:30:12,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=252, PETRI_FLOW=11151, PETRI_PLACES=450, PETRI_TRANSITIONS=1843} [2024-01-31 17:30:12,346 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 418 predicate places. [2024-01-31 17:30:12,346 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1843 transitions, 11151 flow [2024-01-31 17:30:12,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 6.178947368421053) internal successors, (587), 95 states have internal predecessors, (587), 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) [2024-01-31 17:30:12,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:30:12,347 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:30:12,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:30:12,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:30:12,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:30:12,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:30:12,561 INFO L85 PathProgramCache]: Analyzing trace with hash -894316794, now seen corresponding path program 1 times [2024-01-31 17:30:12,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:30:12,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815436001] [2024-01-31 17:30:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:30:12,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:30:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:30:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:30:14,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:30:14,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815436001] [2024-01-31 17:30:14,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815436001] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:30:14,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54183214] [2024-01-31 17:30:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:30:14,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:30:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:30:14,506 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) [2024-01-31 17:30:14,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:30:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:30:14,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 91 conjunts are in the unsatisfiable core [2024-01-31 17:30:14,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:30:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:30:16,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:30:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:30:18,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54183214] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:30:18,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:30:18,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 102 [2024-01-31 17:30:18,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606315642] [2024-01-31 17:30:18,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:30:18,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-01-31 17:30:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:30:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-01-31 17:30:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1430, Invalid=9076, Unknown=0, NotChecked=0, Total=10506 [2024-01-31 17:30:18,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 17:30:18,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1843 transitions, 11151 flow. Second operand has 103 states, 103 states have (on average 6.223300970873787) internal successors, (641), 103 states have internal predecessors, (641), 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) [2024-01-31 17:30:18,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:30:18,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 17:30:18,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand