./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-7.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_safe-7.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_safe-7.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/fib_safe-7.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 16:40:41,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:40:41,136 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:40:41,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:40:41,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:40:41,163 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:40:41,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:40:41,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:40:41,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:40:41,174 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:40:41,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:40:41,175 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:40:41,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:40:41,176 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:40:41,177 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:40:41,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:40:41,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:40:41,177 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:40:41,177 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:40:41,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:40:41,178 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:40:41,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:40:41,178 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:40:41,179 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:40:41,179 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:40:41,179 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:40:41,179 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:40:41,180 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:40:41,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:40:41,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:40:41,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:40:41,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:40:41,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:41,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:40:41,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:40:41,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:40:41,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:40:41,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:40:41,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:40:41,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:40:41,183 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:40:41,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:40:41,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:40:41,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:40:41,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:40:41,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:40:41,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:40:41,438 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:40:41,438 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:40:41,439 INFO L431 ainManager$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_safe-7.yml/witness.yml [2024-01-31 16:40:41,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:40:41,556 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:40:41,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-7.i [2024-01-31 16:40:42,720 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:40:42,934 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:40:42,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i [2024-01-31 16:40:42,950 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f01993d8/0ca70f78b0624b039f0df448188080d2/FLAG23f256a03 [2024-01-31 16:40:42,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f01993d8/0ca70f78b0624b039f0df448188080d2 [2024-01-31 16:40:42,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:40:42,972 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:40:42,973 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:42,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:40:42,977 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:40:42,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:41" (1/2) ... [2024-01-31 16:40:42,982 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8a4f81 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:42, skipping insertion in model container [2024-01-31 16:40:42,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:41" (1/2) ... [2024-01-31 16:40:42,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6aab8857 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:40:42, skipping insertion in model container [2024-01-31 16:40:42,985 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:42" (2/2) ... [2024-01-31 16:40:42,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8a4f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:42, skipping insertion in model container [2024-01-31 16:40:42,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:40:42" (2/2) ... [2024-01-31 16:40:42,986 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:40:43,091 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:40:43,093 INFO L98 nessWitnessExtractor]: Location invariant after [L722-L722] assert_cond == (_Bool)0 || assert_cond == (_Bool)1 [2024-01-31 16:40:43,093 INFO L98 nessWitnessExtractor]: Location invariant after [L724-L724] ((((1 <= i) && (1 <= j)) && (1 <= correct)) && (correct != 0)) && (assert_cond == (_Bool)0 || assert_cond == (_Bool)1) [2024-01-31 16:40:43,093 INFO L98 nessWitnessExtractor]: Location invariant after [L681-L681] expression == 1 [2024-01-31 16:40:43,093 INFO L98 nessWitnessExtractor]: Location invariant before [L681-L681] expression == 0 [2024-01-31 16:40:43,135 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:40:43,396 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_safe-7.i[30241,30254] [2024-01-31 16:40:43,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:43,422 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:40:43,495 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_safe-7.i[30241,30254] Start Parsing Local [2024-01-31 16:40:43,522 WARN L424 MainDispatcher]: Unable to annotate ; with a witness entry [2024-01-31 16:40:43,548 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:40:43,549 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 16:40:43,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:40:43,620 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:40:43,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43 WrapperNode [2024-01-31 16:40:43,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:40:43,625 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:43,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:40:43,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:40:43,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,722 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-01-31 16:40:43,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:40:43,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:40:43,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:40:43,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:40:43,746 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,752 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,785 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 16:40:43,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,796 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:40:43,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:40:43,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:40:43,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:40:43,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (1/1) ... [2024-01-31 16:40:43,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:40:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:43,878 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 16:40:43,947 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 16:40:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 16:40:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 16:40:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 16:40:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 16:40:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:40:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:40:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:40:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 16:40:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:40:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:40:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:40:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:40:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:40:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:40:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 16:40:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:40:43,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:40:43,981 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 16:40:44,116 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:40:44,118 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:40:44,232 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:40:44,233 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:40:44,310 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:40:44,310 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 16:40:44,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:44 BoogieIcfgContainer [2024-01-31 16:40:44,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:40:44,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:40:44,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:40:44,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:40:44,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:40:41" (1/4) ... [2024-01-31 16:40:44,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2565f687 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:40:44, skipping insertion in model container [2024-01-31 16:40:44,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:40:42" (2/4) ... [2024-01-31 16:40:44,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2565f687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:44, skipping insertion in model container [2024-01-31 16:40:44,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:40:43" (3/4) ... [2024-01-31 16:40:44,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2565f687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:40:44, skipping insertion in model container [2024-01-31 16:40:44,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:40:44" (4/4) ... [2024-01-31 16:40:44,318 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2024-01-31 16:40:44,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:40:44,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 16:40:44,332 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:40:44,369 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 16:40:44,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 16:40:44,423 INFO L124 PetriNetUnfolderBase]: 4/29 cut-off events. [2024-01-31 16:40:44,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:40:44,425 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 16:40:44,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 70 flow [2024-01-31 16:40:44,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 29 transitions, 64 flow [2024-01-31 16:40:44,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:40:44,438 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;@688f4eb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:40:44,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 16:40:44,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:40:44,446 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 16:40:44,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:40:44,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:44,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:44,447 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 16:40:44,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1052799117, now seen corresponding path program 1 times [2024-01-31 16:40:44,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:44,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298273446] [2024-01-31 16:40:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:44,707 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 16:40:44,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298273446] [2024-01-31 16:40:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298273446] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:44,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:40:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:40:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657054899] [2024-01-31 16:40:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:44,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:44,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:44,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:40:44,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:44,741 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 16:40:44,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:44,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:44,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:44,840 INFO L124 PetriNetUnfolderBase]: 115/241 cut-off events. [2024-01-31 16:40:44,858 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 16:40:44,860 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 16:40:44,863 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 20 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2024-01-31 16:40:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 122 flow [2024-01-31 16:40:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-31 16:40:44,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7204301075268817 [2024-01-31 16:40:44,875 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 67 transitions. [2024-01-31 16:40:44,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 122 flow [2024-01-31 16:40:44,878 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 16:40:44,880 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 70 flow [2024-01-31 16:40:44,882 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 16:40:44,887 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-01-31 16:40:44,887 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 70 flow [2024-01-31 16:40:44,887 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 16:40:44,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:44,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:44,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:40:44,888 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 16:40:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1697611135, now seen corresponding path program 1 times [2024-01-31 16:40:44,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:44,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156635064] [2024-01-31 16:40:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:44,995 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 16:40:44,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156635064] [2024-01-31 16:40:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156635064] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335620097] [2024-01-31 16:40:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:44,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:44,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:44,999 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 16:40:45,024 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 16:40:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:40:45,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:45,122 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 16:40:45,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:40:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335620097] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:40:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:40:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-01-31 16:40:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831369764] [2024-01-31 16:40:45,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:40:45,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:40:45,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:40:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:40:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-01-31 16:40:45,132 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 16:40:45,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:45,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-01-31 16:40:45,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:45,229 INFO L124 PetriNetUnfolderBase]: 151/259 cut-off events. [2024-01-31 16:40:45,234 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:40:45,236 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 16:40:45,238 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 23 selfloop transitions, 1 changer transitions 1/33 dead transitions. [2024-01-31 16:40:45,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 130 flow [2024-01-31 16:40:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:40:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:40:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-31 16:40:45,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-01-31 16:40:45,249 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 70 flow. Second operand 3 states and 55 transitions. [2024-01-31 16:40:45,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 130 flow [2024-01-31 16:40:45,250 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 16:40:45,251 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 66 flow [2024-01-31 16:40:45,251 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 16:40:45,251 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-01-31 16:40:45,252 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 66 flow [2024-01-31 16:40:45,252 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 16:40:45,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:45,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:45,267 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 16:40:45,464 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 16:40:45,464 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 16:40:45,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1086337880, now seen corresponding path program 1 times [2024-01-31 16:40:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:45,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772265696] [2024-01-31 16:40:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,524 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 16:40:45,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772265696] [2024-01-31 16:40:45,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772265696] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643737191] [2024-01-31 16:40:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:45,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:45,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:45,531 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 16:40:45,535 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 16:40:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:45,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 16:40:45,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:45,617 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 16:40:45,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:45,631 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 16:40:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643737191] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:45,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:45,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-31 16:40:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355248185] [2024-01-31 16:40:45,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:40:45,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:40:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:40:45,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:45,634 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 16:40:45,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:45,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:45,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:45,700 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-31 16:40:45,701 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:40:45,704 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 16:40:45,707 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 16:40:45,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 212 flow [2024-01-31 16:40:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:40:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:40:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-01-31 16:40:45,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2024-01-31 16:40:45,712 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 66 flow. Second operand 6 states and 130 transitions. [2024-01-31 16:40:45,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 212 flow [2024-01-31 16:40:45,713 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 16:40:45,715 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 101 flow [2024-01-31 16:40:45,715 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 16:40:45,716 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2024-01-31 16:40:45,716 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 101 flow [2024-01-31 16:40:45,716 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 16:40:45,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:45,717 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:45,728 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 16:40:45,928 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 16:40:45,929 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 16:40:45,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1699060964, now seen corresponding path program 2 times [2024-01-31 16:40:45,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:45,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246872249] [2024-01-31 16:40:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:45,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:46,072 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 16:40:46,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246872249] [2024-01-31 16:40:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246872249] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838075158] [2024-01-31 16:40:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:40:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:46,074 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 16:40:46,076 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 16:40:46,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:40:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:46,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 16:40:46,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:46,199 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 16:40:46,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:46,275 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 16:40:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838075158] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:46,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:46,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 16:40:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919890203] [2024-01-31 16:40:46,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 16:40:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 16:40:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:40:46,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:46,280 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 16:40:46,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:46,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:46,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:46,401 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-31 16:40:46,401 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-31 16:40:46,403 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 16:40:46,404 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-31 16:40:46,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 95 transitions, 427 flow [2024-01-31 16:40:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:40:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:40:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-01-31 16:40:46,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696236559139785 [2024-01-31 16:40:46,411 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 101 flow. Second operand 12 states and 259 transitions. [2024-01-31 16:40:46,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 95 transitions, 427 flow [2024-01-31 16:40:46,416 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 16:40:46,422 INFO L231 Difference]: Finished difference. Result has 54 places, 35 transitions, 171 flow [2024-01-31 16:40:46,422 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 16:40:46,423 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-01-31 16:40:46,424 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 35 transitions, 171 flow [2024-01-31 16:40:46,424 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 16:40:46,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:46,424 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:46,438 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 16:40:46,635 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 16:40:46,636 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 16:40:46,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1349105564, now seen corresponding path program 3 times [2024-01-31 16:40:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633482431] [2024-01-31 16:40:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:46,857 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 16:40:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:46,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633482431] [2024-01-31 16:40:46,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633482431] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045253326] [2024-01-31 16:40:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:40:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:46,859 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 16:40:46,868 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 16:40:46,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-31 16:40:46,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:46,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:40:46,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:46,988 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 16:40:46,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:47,120 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 16:40:47,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045253326] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:47,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:47,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-01-31 16:40:47,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436078816] [2024-01-31 16:40:47,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:47,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 16:40:47,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 16:40:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:40:47,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 31 [2024-01-31 16:40:47,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 35 transitions, 171 flow. Second operand has 19 states, 19 states have (on average 15.421052631578947) internal successors, (293), 19 states have internal predecessors, (293), 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 16:40:47,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:47,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 31 [2024-01-31 16:40:47,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:40:47,333 INFO L124 PetriNetUnfolderBase]: 367/601 cut-off events. [2024-01-31 16:40:47,333 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2024-01-31 16:40:47,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 601 events. 367/601 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1569 event pairs, 20 based on Foata normal form. 54/650 useless extension candidates. Maximal degree in co-relation 1739. Up to 136 conditions per place. [2024-01-31 16:40:47,351 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 110 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-01-31 16:40:47,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 137 transitions, 665 flow [2024-01-31 16:40:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:40:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:40:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 385 transitions. [2024-01-31 16:40:47,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6899641577060932 [2024-01-31 16:40:47,365 INFO L175 Difference]: Start difference. First operand has 54 places, 35 transitions, 171 flow. Second operand 18 states and 385 transitions. [2024-01-31 16:40:47,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 137 transitions, 665 flow [2024-01-31 16:40:47,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 137 transitions, 605 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-01-31 16:40:47,370 INFO L231 Difference]: Finished difference. Result has 72 places, 41 transitions, 219 flow [2024-01-31 16:40:47,370 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=18, PETRI_FLOW=219, PETRI_PLACES=72, PETRI_TRANSITIONS=41} [2024-01-31 16:40:47,371 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2024-01-31 16:40:47,371 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 41 transitions, 219 flow [2024-01-31 16:40:47,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 15.421052631578947) internal successors, (293), 19 states have internal predecessors, (293), 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 16:40:47,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:40:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:40:47,396 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 16:40:47,584 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 16:40:47,584 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 16:40:47,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:40:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash 983061476, now seen corresponding path program 4 times [2024-01-31 16:40:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:40:47,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809391435] [2024-01-31 16:40:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:40:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:40:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:40:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:48,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:40:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809391435] [2024-01-31 16:40:48,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809391435] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:40:48,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690961354] [2024-01-31 16:40:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:40:48,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:40:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:40:48,653 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 16:40:48,677 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 16:40:48,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:40:48,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:40:48,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 59 conjunts are in the unsatisfiable core [2024-01-31 16:40:48,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:40:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:49,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:40:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:40:50,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690961354] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:40:50,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:40:50,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 65 [2024-01-31 16:40:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61412951] [2024-01-31 16:40:50,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:40:50,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-01-31 16:40:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:40:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-01-31 16:40:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=3660, Unknown=0, NotChecked=0, Total=4290 [2024-01-31 16:40:50,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 16:40:50,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 41 transitions, 219 flow. Second operand has 66 states, 66 states have (on average 6.2727272727272725) internal successors, (414), 66 states have internal predecessors, (414), 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 16:40:50,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:40:50,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 16:40:50,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:41:08,802 INFO L124 PetriNetUnfolderBase]: 18493/30087 cut-off events. [2024-01-31 16:41:08,802 INFO L125 PetriNetUnfolderBase]: For 70323/70323 co-relation queries the response was YES. [2024-01-31 16:41:09,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83264 conditions, 30087 events. 18493/30087 cut-off events. For 70323/70323 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 194938 event pairs, 82 based on Foata normal form. 354/30437 useless extension candidates. Maximal degree in co-relation 83230. Up to 3885 conditions per place. [2024-01-31 16:41:09,300 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 690 selfloop transitions, 731 changer transitions 491/1915 dead transitions. [2024-01-31 16:41:09,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 1915 transitions, 12480 flow [2024-01-31 16:41:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2024-01-31 16:41:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2024-01-31 16:41:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 2219 transitions. [2024-01-31 16:41:09,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4364673485444532 [2024-01-31 16:41:09,323 INFO L175 Difference]: Start difference. First operand has 72 places, 41 transitions, 219 flow. Second operand 164 states and 2219 transitions. [2024-01-31 16:41:09,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 1915 transitions, 12480 flow [2024-01-31 16:41:09,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1915 transitions, 10298 flow, removed 722 selfloop flow, removed 11 redundant places. [2024-01-31 16:41:09,634 INFO L231 Difference]: Finished difference. Result has 302 places, 835 transitions, 5043 flow [2024-01-31 16:41:09,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=164, PETRI_FLOW=5043, PETRI_PLACES=302, PETRI_TRANSITIONS=835} [2024-01-31 16:41:09,637 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 270 predicate places. [2024-01-31 16:41:09,637 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 835 transitions, 5043 flow [2024-01-31 16:41:09,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.2727272727272725) internal successors, (414), 66 states have internal predecessors, (414), 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 16:41:09,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:41:09,638 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:41:09,653 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 16:41:09,853 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 16:41:09,855 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 16:41:09,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:41:09,855 INFO L85 PathProgramCache]: Analyzing trace with hash 666392134, now seen corresponding path program 1 times [2024-01-31 16:41:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:41:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370446794] [2024-01-31 16:41:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:09,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:41:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:11,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:41:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370446794] [2024-01-31 16:41:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370446794] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:41:11,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651162322] [2024-01-31 16:41:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:41:11,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:41:11,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:41:11,019 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 16:41:11,021 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 16:41:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:41:11,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 61 conjunts are in the unsatisfiable core [2024-01-31 16:41:11,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:41:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:12,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:41:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:41:13,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651162322] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:41:13,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:41:13,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2024-01-31 16:41:13,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866879882] [2024-01-31 16:41:13,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:41:13,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-01-31 16:41:13,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:41:13,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-01-31 16:41:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=4582, Unknown=0, NotChecked=0, Total=5256 [2024-01-31 16:41:13,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-01-31 16:41:13,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 835 transitions, 5043 flow. Second operand has 73 states, 73 states have (on average 6.315068493150685) internal successors, (461), 73 states have internal predecessors, (461), 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 16:41:13,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:41:13,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-01-31 16:41:13,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand