./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-5.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-5.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-5.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-5.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 17:29:18,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:29:18,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:29:18,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:29:18,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:29:18,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:29:18,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:29:18,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:29:18,388 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:29:18,391 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:29:18,391 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:29:18,391 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:29:18,392 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:29:18,393 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:29:18,393 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:29:18,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:29:18,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:29:18,394 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:29:18,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:29:18,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:29:18,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:29:18,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:29:18,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:29:18,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:29:18,396 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:29:18,396 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:29:18,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:29:18,396 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:29:18,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:29:18,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:29:18,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:29:18,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:29:18,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:29:18,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:29:18,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:29:18,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:29:18,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:29:18,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:29:18,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:29:18,399 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:29:18,400 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:29:18,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:29:18,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:29:18,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:29:18,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:29:18,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:29:18,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:29:18,631 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:29:18,631 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:29:18,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2024-01-31 17:29:19,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:29:19,910 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:29:19,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2024-01-31 17:29:19,932 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7d6d84e2/320eaf24169b4ce5ba76352186c413bd/FLAGaea88553c [2024-01-31 17:29:19,943 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7d6d84e2/320eaf24169b4ce5ba76352186c413bd [2024-01-31 17:29:19,945 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:29:19,946 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:29:19,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_unsafe-5.yml/witness.yml [2024-01-31 17:29:20,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:29:20,034 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:29:20,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:29:20,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:29:20,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:29:20,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:29:19" (1/2) ... [2024-01-31 17:29:20,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d89e101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:29:19" (1/2) ... [2024-01-31 17:29:20,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14b0a081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:20" (2/2) ... [2024-01-31 17:29:20,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d89e101 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20, skipping insertion in model container [2024-01-31 17:29:20,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:20" (2/2) ... [2024-01-31 17:29:20,044 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:29:20,133 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:29:20,135 INFO L98 nessWitnessExtractor]: Location invariant after [L681-L681] expression == 1 [2024-01-31 17:29:20,135 INFO L98 nessWitnessExtractor]: Location invariant after [L722-L722] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-01-31 17:29:20,135 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 17:29:20,135 INFO L98 nessWitnessExtractor]: Location invariant before [L681-L681] expression == 0 [2024-01-31 17:29:20,176 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:29:20,482 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-5.i[30243,30256] [2024-01-31 17:29:20,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:29:20,511 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:29:20,534 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-5.i[30243,30256] Start Parsing Local [2024-01-31 17:29:20,556 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry [2024-01-31 17:29:20,560 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:29:20,568 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:29:20,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:29:20,591 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:29:20,592 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20 WrapperNode [2024-01-31 17:29:20,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:29:20,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:29:20,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:29:20,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:29:20,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,605 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,622 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-01-31 17:29:20,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:29:20,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:29:20,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:29:20,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:29:20,630 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,643 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 17:29:20,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,650 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:29:20,654 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:29:20,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:29:20,654 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:29:20,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (1/1) ... [2024-01-31 17:29:20,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:29:20,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:20,680 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 17:29:20,682 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 17:29:20,707 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 17:29:20,708 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 17:29:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 17:29:20,708 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 17:29:20,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:29:20,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:29:20,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:29:20,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:29:20,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:29:20,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:29:20,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:29:20,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:29:20,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:29:20,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:29:20,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:29:20,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:29:20,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:29:20,711 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 17:29:20,799 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:29:20,800 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:29:21,003 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:29:21,004 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:29:21,075 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:29:21,076 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:29:21,076 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:29:21 BoogieIcfgContainer [2024-01-31 17:29:21,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:29:21,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:29:21,078 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:29:21,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:29:21,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:29:19" (1/4) ... [2024-01-31 17:29:21,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9afb0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:29:21, skipping insertion in model container [2024-01-31 17:29:21,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:29:20" (2/4) ... [2024-01-31 17:29:21,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9afb0f3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:29:21, skipping insertion in model container [2024-01-31 17:29:21,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:29:20" (3/4) ... [2024-01-31 17:29:21,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9afb0f3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:29:21, skipping insertion in model container [2024-01-31 17:29:21,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:29:21" (4/4) ... [2024-01-31 17:29:21,084 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2024-01-31 17:29:21,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:29:21,096 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 17:29:21,096 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:29:21,129 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:29:21,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 17:29:21,195 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-31 17:29:21,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:29:21,198 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 17:29:21,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 17:29:21,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 29 transitions, 64 flow [2024-01-31 17:29:21,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:29:21,217 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;@1866719b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:29:21,217 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:29:21,229 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:29:21,229 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 17:29:21,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:29:21,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,231 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 17:29:21,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799117, now seen corresponding path program 1 times [2024-01-31 17:29:21,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311851149] [2024-01-31 17:29:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:21,465 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 17:29:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311851149] [2024-01-31 17:29:21,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311851149] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:29:21,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:29:21,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:29:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220002312] [2024-01-31 17:29:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:29:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:29:21,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:29:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:29:21,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:21,505 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 17:29:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:21,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:21,588 INFO L124 PetriNetUnfolderBase]: 115/241 cut-off events. [2024-01-31 17:29:21,589 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 17:29:21,590 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 17:29:21,593 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 20 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2024-01-31 17:29:21,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 122 flow [2024-01-31 17:29:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:29:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:29:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-31 17:29:21,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-01-31 17:29:21,604 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 67 transitions. [2024-01-31 17:29:21,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 122 flow [2024-01-31 17:29:21,607 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 17:29:21,609 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2024-01-31 17:29:21,610 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 17:29:21,613 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-01-31 17:29:21,613 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2024-01-31 17:29:21,613 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 17:29:21,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:29:21,614 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 17:29:21,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1697611135, now seen corresponding path program 1 times [2024-01-31 17:29:21,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:21,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519475031] [2024-01-31 17:29:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:21,688 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 17:29:21,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519475031] [2024-01-31 17:29:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519475031] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880023176] [2024-01-31 17:29:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:21,713 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 17:29:21,728 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 17:29:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:21,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:29:21,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:21,840 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 17:29:21,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:29:21,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880023176] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:29:21,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:29:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-01-31 17:29:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974874659] [2024-01-31 17:29:21,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:29:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:29:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:29:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:29:21,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-01-31 17:29:21,846 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 17:29:21,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:21,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-01-31 17:29:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:21,935 INFO L124 PetriNetUnfolderBase]: 151/259 cut-off events. [2024-01-31 17:29:21,939 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:29:21,940 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 17:29:21,941 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 23 selfloop transitions, 1 changer transitions 1/33 dead transitions. [2024-01-31 17:29:21,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 130 flow [2024-01-31 17:29:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:29:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:29:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 17:29:21,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-01-31 17:29:21,945 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-01-31 17:29:21,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 130 flow [2024-01-31 17:29:21,945 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 17:29:21,948 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 66 flow [2024-01-31 17:29:21,948 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 17:29:21,949 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-01-31 17:29:21,949 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 66 flow [2024-01-31 17:29:21,949 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 17:29:21,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:21,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:21,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:29:22,160 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 17:29:22,161 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 17:29:22,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1086337880, now seen corresponding path program 1 times [2024-01-31 17:29:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101061617] [2024-01-31 17:29:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,291 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 17:29:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101061617] [2024-01-31 17:29:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101061617] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024511402] [2024-01-31 17:29:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:22,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:22,294 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 17:29:22,310 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 17:29:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:29:22,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:22,393 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 17:29:22,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:22,408 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 17:29:22,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024511402] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:22,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:22,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 17:29:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164525277] [2024-01-31 17:29:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:22,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:29:22,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:29:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:29:22,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:22,411 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 17:29:22,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:22,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:22,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:22,473 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-31 17:29:22,474 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:29:22,474 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 17:29:22,476 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 17:29:22,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 212 flow [2024-01-31 17:29:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:29:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:29:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-01-31 17:29:22,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2024-01-31 17:29:22,478 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 66 flow. Second operand 6 states and 130 transitions. [2024-01-31 17:29:22,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 212 flow [2024-01-31 17:29:22,479 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 17:29:22,480 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 101 flow [2024-01-31 17:29:22,480 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 17:29:22,480 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-01-31 17:29:22,480 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 101 flow [2024-01-31 17:29:22,481 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 17:29:22,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:22,481 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:22,509 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 17:29:22,693 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 17:29:22,693 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 17:29:22,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:22,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1699060964, now seen corresponding path program 2 times [2024-01-31 17:29:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203070264] [2024-01-31 17:29:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:22,756 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 17:29:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:22,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203070264] [2024-01-31 17:29:22,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203070264] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:22,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635851760] [2024-01-31 17:29:22,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:29:22,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:22,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:22,758 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 17:29:22,785 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 17:29:22,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:29:22,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:22,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:29:22,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:22,866 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 17:29:22,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:22,920 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 17:29:22,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635851760] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:22,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:22,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 17:29:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021240752] [2024-01-31 17:29:22,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:22,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:29:22,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:22,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:29:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:29:22,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:22,923 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 17:29:22,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:22,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:23,031 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-31 17:29:23,032 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-31 17:29:23,032 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 17:29:23,034 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-31 17:29:23,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 427 flow [2024-01-31 17:29:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:29:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:29:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-01-31 17:29:23,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696236559139785 [2024-01-31 17:29:23,036 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 101 flow. Second operand 12 states and 259 transitions. [2024-01-31 17:29:23,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 427 flow [2024-01-31 17:29:23,038 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 17:29:23,039 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 171 flow [2024-01-31 17:29:23,039 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 17:29:23,040 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-01-31 17:29:23,040 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 171 flow [2024-01-31 17:29:23,040 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 17:29:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:23,054 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 17:29:23,252 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 17:29:23,253 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 17:29:23,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1349105564, now seen corresponding path program 3 times [2024-01-31 17:29:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653150628] [2024-01-31 17:29:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:23,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:23,405 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 17:29:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653150628] [2024-01-31 17:29:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653150628] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881672264] [2024-01-31 17:29:23,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:29:23,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:23,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:23,407 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 17:29:23,415 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 17:29:23,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-31 17:29:23,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:23,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:29:23,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:23,503 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 17:29:23,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:23,573 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 17:29:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881672264] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:23,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:23,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-01-31 17:29:23,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368390950] [2024-01-31 17:29:23,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:29:23,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:29:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:29:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 17:29:23,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 35 transitions, 171 flow. Second operand has 15 states, 15 states have (on average 15.533333333333333) internal successors, (233), 15 states have internal predecessors, (233), 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 17:29:23,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:23,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 17:29:23,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:23,683 INFO L124 PetriNetUnfolderBase]: 295/493 cut-off events. [2024-01-31 17:29:23,683 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2024-01-31 17:29:23,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1441 conditions, 493 events. 295/493 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1304 event pairs, 20 based on Foata normal form. 18/506 useless extension candidates. Maximal degree in co-relation 1415. Up to 100 conditions per place. [2024-01-31 17:29:23,685 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 86 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2024-01-31 17:29:23,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 529 flow [2024-01-31 17:29:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:29:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:29:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 297 transitions. [2024-01-31 17:29:23,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.684331797235023 [2024-01-31 17:29:23,687 INFO L175 Difference]: Start difference. First operand has 54 places, 35 transitions, 171 flow. Second operand 14 states and 297 transitions. [2024-01-31 17:29:23,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 529 flow [2024-01-31 17:29:23,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 477 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-01-31 17:29:23,691 INFO L231 Difference]: Finished difference. Result has 64 places, 37 transitions, 171 flow [2024-01-31 17:29:23,692 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=14, PETRI_FLOW=171, PETRI_PLACES=64, PETRI_TRANSITIONS=37} [2024-01-31 17:29:23,692 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2024-01-31 17:29:23,692 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 37 transitions, 171 flow [2024-01-31 17:29:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.533333333333333) internal successors, (233), 15 states have internal predecessors, (233), 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 17:29:23,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:23,693 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:23,720 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 17:29:23,923 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 17:29:23,924 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 17:29:23,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1207473892, now seen corresponding path program 4 times [2024-01-31 17:29:23,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:23,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275317677] [2024-01-31 17:29:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275317677] [2024-01-31 17:29:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275317677] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777814042] [2024-01-31 17:29:24,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:29:24,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:24,577 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 17:29:24,596 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 17:29:24,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:29:24,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:24,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-31 17:29:24,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:25,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777814042] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:25,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:25,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2024-01-31 17:29:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067586398] [2024-01-31 17:29:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:25,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-01-31 17:29:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-01-31 17:29:25,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2024-01-31 17:29:25,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 17:29:25,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 37 transitions, 171 flow. Second operand has 54 states, 54 states have (on average 6.333333333333333) internal successors, (342), 54 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:25,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:25,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 17:29:25,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:35,069 INFO L124 PetriNetUnfolderBase]: 11845/19498 cut-off events. [2024-01-31 17:29:35,069 INFO L125 PetriNetUnfolderBase]: For 34421/34421 co-relation queries the response was YES. [2024-01-31 17:29:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50912 conditions, 19498 events. 11845/19498 cut-off events. For 34421/34421 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 123734 event pairs, 124 based on Foata normal form. 276/19770 useless extension candidates. Maximal degree in co-relation 50882. Up to 2508 conditions per place. [2024-01-31 17:29:35,184 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 520 selfloop transitions, 445 changer transitions 383/1351 dead transitions. [2024-01-31 17:29:35,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1351 transitions, 7960 flow [2024-01-31 17:29:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-01-31 17:29:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2024-01-31 17:29:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 1699 transitions. [2024-01-31 17:29:35,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349718381976446 [2024-01-31 17:29:35,278 INFO L175 Difference]: Start difference. First operand has 64 places, 37 transitions, 171 flow. Second operand 126 states and 1699 transitions. [2024-01-31 17:29:35,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1351 transitions, 7960 flow [2024-01-31 17:29:35,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 1351 transitions, 6978 flow, removed 210 selfloop flow, removed 11 redundant places. [2024-01-31 17:29:35,339 INFO L231 Difference]: Finished difference. Result has 240 places, 527 transitions, 3171 flow [2024-01-31 17:29:35,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=3171, PETRI_PLACES=240, PETRI_TRANSITIONS=527} [2024-01-31 17:29:35,342 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 208 predicate places. [2024-01-31 17:29:35,343 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 527 transitions, 3171 flow [2024-01-31 17:29:35,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.333333333333333) internal successors, (342), 54 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:35,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:35,345 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:35,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 17:29:35,556 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 17:29:35,558 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 17:29:35,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash 649238790, now seen corresponding path program 1 times [2024-01-31 17:29:35,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:35,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963240802] [2024-01-31 17:29:35,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:35,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:36,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:36,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963240802] [2024-01-31 17:29:36,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963240802] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:36,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758602209] [2024-01-31 17:29:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:36,321 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 17:29:36,324 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 17:29:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:36,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-31 17:29:36,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:37,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:29:37,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758602209] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:37,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-01-31 17:29:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139373410] [2024-01-31 17:29:37,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:37,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-01-31 17:29:37,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-01-31 17:29:37,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3217, Unknown=0, NotChecked=0, Total=3660 [2024-01-31 17:29:38,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 17:29:38,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 527 transitions, 3171 flow. Second operand has 61 states, 61 states have (on average 6.377049180327869) internal successors, (389), 61 states have internal predecessors, (389), 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 17:29:38,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:38,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 17:29:38,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand