./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s2.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/bigshot_s2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 59af5db6 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/bigshot_s2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.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-dev-59af5db-m [2024-02-02 09:11:11,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:11:11,193 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:11:11,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:11:11,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:11:11,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:11:11,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:11:11,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:11:11,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:11:11,217 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:11:11,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:11:11,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:11:11,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:11:11,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:11:11,219 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:11:11,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:11:11,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:11:11,222 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:11:11,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:11:11,223 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:11:11,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:11:11,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:11:11,224 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:11:11,224 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:11:11,224 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:11:11,224 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:11:11,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:11:11,225 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:11:11,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:11:11,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:11:11,225 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:11:11,225 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:11:11,226 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:11:11,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:11:11,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:11:11,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:11:11,226 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:11:11,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:11:11,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:11:11,227 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:11:11,227 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:11:11,227 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:11:11,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:11:11,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:11:11,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:11:11,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:11:11,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:11:11,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:11:11,430 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:11:11,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.i [2024-02-02 09:11:12,520 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:11:12,733 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:11:12,733 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.i [2024-02-02 09:11:12,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6527cd6d/ceb14c0ff86d4d4faa1b07d8f1cfba6b/FLAGb077cba8b [2024-02-02 09:11:12,766 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6527cd6d/ceb14c0ff86d4d4faa1b07d8f1cfba6b [2024-02-02 09:11:12,768 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:11:12,769 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:11:12,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s2.yml/witness.yml [2024-02-02 09:11:12,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:11:12,837 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:11:12,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:11:12,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:11:12,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:11:12,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:11:12" (1/2) ... [2024-02-02 09:11:12,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9787a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:12, skipping insertion in model container [2024-02-02 09:11:12,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:11:12" (1/2) ... [2024-02-02 09:11:12,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d04bc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:11:12, skipping insertion in model container [2024-02-02 09:11:12,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:12" (2/2) ... [2024-02-02 09:11:12,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9787a1a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:12, skipping insertion in model container [2024-02-02 09:11:12,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:12" (2/2) ... [2024-02-02 09:11:12,845 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:11:12,872 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:11:12,874 INFO L101 nessWitnessExtractor]: Location invariant before [L1116-L1116] ((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL) [2024-02-02 09:11:12,874 INFO L101 nessWitnessExtractor]: Location invariant before [L1117-L1117] (unsigned long )arg == 0UL [2024-02-02 09:11:12,874 INFO L101 nessWitnessExtractor]: Location invariant before [L1111-L1111] (unsigned long )arg == 0UL [2024-02-02 09:11:12,874 INFO L101 nessWitnessExtractor]: Location invariant before [L1112-L1112] (unsigned long )arg == 0UL [2024-02-02 09:11:12,875 INFO L101 nessWitnessExtractor]: Location invariant before [L1107-L1107] ((((expression == 1) && (0 <= expression)) && (expression <= 1)) && (expression == 0 || expression == 1)) && (expression == 0) [2024-02-02 09:11:12,875 INFO L101 nessWitnessExtractor]: Location invariant before [L1122-L1122] v == 0 [2024-02-02 09:11:12,930 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:11:13,253 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/bigshot_s2.i[55203,55216] [2024-02-02 09:11:13,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:11:13,270 INFO L202 MainTranslator]: Completed pre-run [2024-02-02 09:11:13,321 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/bigshot_s2.i[55203,55216] [2024-02-02 09:11:13,322 WARN L424 MainDispatcher]: Unable to annotate void __VERIFIER_assert(int expression) { if (!expression) { ERROR: {reach_error();abort();}}; return; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:11:13,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:11:13,404 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:11:13,404 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13 WrapperNode [2024-02-02 09:11:13,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:11:13,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:11:13,405 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:11:13,405 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:11:13,411 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 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,426 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 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,443 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-02-02 09:11:13,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:11:13,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:11:13,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:11:13,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:11:13,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,454 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,465 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-02-02 09:11:13,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,481 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:11:13,482 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:11:13,483 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:11:13,483 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:11:13,484 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (1/1) ... [2024-02-02 09:11:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:11:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:13,520 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) [2024-02-02 09:11:13,528 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 [2024-02-02 09:11:13,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 09:11:13,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 09:11:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 09:11:13,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 09:11:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 09:11:13,552 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 09:11:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:11:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:11:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:11:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 09:11:13,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 09:11:13,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:11:13,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:11:13,555 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:11:13,666 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:11:13,668 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:11:13,804 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:11:13,805 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:11:13,891 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:11:13,891 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-02 09:11:13,892 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:11:13 BoogieIcfgContainer [2024-02-02 09:11:13,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:11:13,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:11:13,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:11:13,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:11:13,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:11:12" (1/4) ... [2024-02-02 09:11:13,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e953ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:11:13, skipping insertion in model container [2024-02-02 09:11:13,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:11:12" (2/4) ... [2024-02-02 09:11:13,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e953ffd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:11:13, skipping insertion in model container [2024-02-02 09:11:13,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:11:13" (3/4) ... [2024-02-02 09:11:13,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e953ffd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:11:13, skipping insertion in model container [2024-02-02 09:11:13,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:11:13" (4/4) ... [2024-02-02 09:11:13,905 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-02-02 09:11:13,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:11:13,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-02-02 09:11:13,919 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:11:13,976 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 09:11:14,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 35 transitions, 84 flow [2024-02-02 09:11:14,056 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2024-02-02 09:11:14,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:11:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 4/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-02-02 09:11:14,059 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 35 transitions, 84 flow [2024-02-02 09:11:14,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 72 flow [2024-02-02 09:11:14,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:11:14,083 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;@64c5344a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:11:14,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-02-02 09:11:14,085 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:11:14,085 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:11:14,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:14,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:14,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:11:14,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 7437, now seen corresponding path program 1 times [2024-02-02 09:11:14,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188706233] [2024-02-02 09:11:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:14,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:14,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:14,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188706233] [2024-02-02 09:11:14,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188706233] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:14,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:14,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:11:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613163198] [2024-02-02 09:11:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:11:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:11:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:11:14,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-02-02 09:11:14,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 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) [2024-02-02 09:11:14,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:14,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-02-02 09:11:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:14,447 INFO L124 PetriNetUnfolderBase]: 10/55 cut-off events. [2024-02-02 09:11:14,448 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-02 09:11:14,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 55 events. 10/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 4 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 71. Up to 27 conditions per place. [2024-02-02 09:11:14,450 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 20 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-02-02 09:11:14,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 127 flow [2024-02-02 09:11:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:11:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:11:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-02 09:11:14,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-02-02 09:11:14,461 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 64 transitions. [2024-02-02 09:11:14,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 127 flow [2024-02-02 09:11:14,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-02 09:11:14,466 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 66 flow [2024-02-02 09:11:14,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-02-02 09:11:14,470 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-02-02 09:11:14,470 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 66 flow [2024-02-02 09:11:14,470 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) [2024-02-02 09:11:14,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:14,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:11:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:11:14,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:14,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash 221809237, now seen corresponding path program 1 times [2024-02-02 09:11:14,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:14,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473503511] [2024-02-02 09:11:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:14,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:14,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:14,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473503511] [2024-02-02 09:11:14,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473503511] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:14,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:14,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141461769] [2024-02-02 09:11:14,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:14,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:14,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-02-02 09:11:14,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-02-02 09:11:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:14,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-02-02 09:11:14,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:14,706 INFO L124 PetriNetUnfolderBase]: 10/51 cut-off events. [2024-02-02 09:11:14,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:14,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 51 events. 10/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 5 based on Foata normal form. 2/50 useless extension candidates. Maximal degree in co-relation 52. Up to 34 conditions per place. [2024-02-02 09:11:14,707 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2024-02-02 09:11:14,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 102 flow [2024-02-02 09:11:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-02 09:11:14,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-02-02 09:11:14,710 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 66 flow. Second operand 4 states and 69 transitions. [2024-02-02 09:11:14,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 102 flow [2024-02-02 09:11:14,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:14,715 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 60 flow [2024-02-02 09:11:14,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-02-02 09:11:14,716 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2024-02-02 09:11:14,716 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 60 flow [2024-02-02 09:11:14,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-02-02 09:11:14,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:14,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:14,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:11:14,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:14,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1423021055, now seen corresponding path program 1 times [2024-02-02 09:11:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:14,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470755002] [2024-02-02 09:11:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:14,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470755002] [2024-02-02 09:11:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470755002] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:14,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:14,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294855245] [2024-02-02 09:11:14,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:14,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:11:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:11:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:11:14,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-02-02 09:11:14,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2024-02-02 09:11:14,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:14,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-02-02 09:11:14,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:14,901 INFO L124 PetriNetUnfolderBase]: 10/41 cut-off events. [2024-02-02 09:11:14,901 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:14,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 41 events. 10/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 2 based on Foata normal form. 2/42 useless extension candidates. Maximal degree in co-relation 67. Up to 18 conditions per place. [2024-02-02 09:11:14,902 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2024-02-02 09:11:14,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 96 flow [2024-02-02 09:11:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:11:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:11:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-02 09:11:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-02-02 09:11:14,905 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 60 flow. Second operand 4 states and 69 transitions. [2024-02-02 09:11:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 96 flow [2024-02-02 09:11:14,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:14,907 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 57 flow [2024-02-02 09:11:14,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-02-02 09:11:14,909 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2024-02-02 09:11:14,909 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 57 flow [2024-02-02 09:11:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2024-02-02 09:11:14,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:14,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:14,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:11:14,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:14,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1575988865, now seen corresponding path program 1 times [2024-02-02 09:11:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053231067] [2024-02-02 09:11:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:14,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:14,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053231067] [2024-02-02 09:11:14,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053231067] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:14,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:14,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:11:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993220904] [2024-02-02 09:11:14,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:14,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:11:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:11:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:11:14,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:14,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-02-02 09:11:14,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:14,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:15,018 INFO L124 PetriNetUnfolderBase]: 8/37 cut-off events. [2024-02-02 09:11:15,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:11:15,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 37 events. 8/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 4 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 63. Up to 26 conditions per place. [2024-02-02 09:11:15,019 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 17 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2024-02-02 09:11:15,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 93 flow [2024-02-02 09:11:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:11:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:11:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-02 09:11:15,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-02-02 09:11:15,021 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 57 flow. Second operand 3 states and 61 transitions. [2024-02-02 09:11:15,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 93 flow [2024-02-02 09:11:15,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:11:15,022 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2024-02-02 09:11:15,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-02-02 09:11:15,023 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2024-02-02 09:11:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2024-02-02 09:11:15,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-02-02 09:11:15,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:15,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:11:15,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:15,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1298054752, now seen corresponding path program 1 times [2024-02-02 09:11:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:15,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048906617] [2024-02-02 09:11:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:15,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:15,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048906617] [2024-02-02 09:11:15,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048906617] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:11:15,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:11:15,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-02 09:11:15,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840621042] [2024-02-02 09:11:15,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:11:15,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 09:11:15,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:15,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 09:11:15,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-02 09:11:15,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-02-02 09:11:15,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 54 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2024-02-02 09:11:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-02-02 09:11:15,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:15,497 INFO L124 PetriNetUnfolderBase]: 13/55 cut-off events. [2024-02-02 09:11:15,498 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 09:11:15,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 55 events. 13/55 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 81 event pairs, 6 based on Foata normal form. 1/53 useless extension candidates. Maximal degree in co-relation 100. Up to 31 conditions per place. [2024-02-02 09:11:15,499 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 19 selfloop transitions, 5 changer transitions 5/34 dead transitions. [2024-02-02 09:11:15,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 135 flow [2024-02-02 09:11:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:11:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:11:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-02-02 09:11:15,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-02-02 09:11:15,501 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 54 flow. Second operand 8 states and 126 transitions. [2024-02-02 09:11:15,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 135 flow [2024-02-02 09:11:15,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:11:15,503 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 81 flow [2024-02-02 09:11:15,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=81, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2024-02-02 09:11:15,503 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2024-02-02 09:11:15,503 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 81 flow [2024-02-02 09:11:15,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2024-02-02 09:11:15,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:15,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:15,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:11:15,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:15,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:15,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1281396769, now seen corresponding path program 1 times [2024-02-02 09:11:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:15,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527491702] [2024-02-02 09:11:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:15,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527491702] [2024-02-02 09:11:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527491702] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:15,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4266484] [2024-02-02 09:11:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:15,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:15,641 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) [2024-02-02 09:11:15,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 09:11:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:15,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-02 09:11:15,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:15,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-02 09:11:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:15,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:15,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4266484] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:15,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:15,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-02-02 09:11:15,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667225265] [2024-02-02 09:11:15,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:15,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-02 09:11:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-02 09:11:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-02 09:11:15,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:15,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 81 flow. Second operand has 14 states, 14 states have (on average 17.357142857142858) internal successors, (243), 14 states have internal predecessors, (243), 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) [2024-02-02 09:11:15,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:15,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:15,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:15,997 INFO L124 PetriNetUnfolderBase]: 15/56 cut-off events. [2024-02-02 09:11:15,998 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-02 09:11:15,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 56 events. 15/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 7 based on Foata normal form. 2/56 useless extension candidates. Maximal degree in co-relation 133. Up to 33 conditions per place. [2024-02-02 09:11:15,999 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 6 changer transitions 1/33 dead transitions. [2024-02-02 09:11:15,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 155 flow [2024-02-02 09:11:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 09:11:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 09:11:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-02-02 09:11:16,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2024-02-02 09:11:16,000 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 81 flow. Second operand 7 states and 127 transitions. [2024-02-02 09:11:16,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 155 flow [2024-02-02 09:11:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 150 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-02 09:11:16,002 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 106 flow [2024-02-02 09:11:16,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2024-02-02 09:11:16,002 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2024-02-02 09:11:16,002 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 106 flow [2024-02-02 09:11:16,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.357142857142858) internal successors, (243), 14 states have internal predecessors, (243), 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) [2024-02-02 09:11:16,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:16,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:16,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-02 09:11:16,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:16,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -561602560, now seen corresponding path program 2 times [2024-02-02 09:11:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602995850] [2024-02-02 09:11:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602995850] [2024-02-02 09:11:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602995850] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825709195] [2024-02-02 09:11:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:11:16,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:16,396 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) [2024-02-02 09:11:16,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 09:11:16,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:11:16,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:11:16,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-02 09:11:16,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:16,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-02 09:11:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:16,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:16,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825709195] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:16,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:16,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-02-02 09:11:16,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73934982] [2024-02-02 09:11:16,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:16,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-02 09:11:16,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-02 09:11:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-02-02 09:11:16,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:16,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 106 flow. Second operand has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 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) [2024-02-02 09:11:16,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:16,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:16,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:16,812 INFO L124 PetriNetUnfolderBase]: 17/62 cut-off events. [2024-02-02 09:11:16,813 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-02 09:11:16,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 62 events. 17/62 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 7 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 166. Up to 33 conditions per place. [2024-02-02 09:11:16,814 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 23 selfloop transitions, 7 changer transitions 1/36 dead transitions. [2024-02-02 09:11:16,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 194 flow [2024-02-02 09:11:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-02 09:11:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-02 09:11:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-02-02 09:11:16,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-02-02 09:11:16,815 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 106 flow. Second operand 8 states and 144 transitions. [2024-02-02 09:11:16,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 194 flow [2024-02-02 09:11:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 36 transitions, 182 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-02 09:11:16,817 INFO L231 Difference]: Finished difference. Result has 46 places, 30 transitions, 130 flow [2024-02-02 09:11:16,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=30} [2024-02-02 09:11:16,817 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2024-02-02 09:11:16,817 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 30 transitions, 130 flow [2024-02-02 09:11:16,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 17.235294117647058) internal successors, (293), 17 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) [2024-02-02 09:11:16,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:16,818 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:16,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:17,029 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,SelfDestructingSolverStorable6 [2024-02-02 09:11:17,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:17,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1226352707, now seen corresponding path program 3 times [2024-02-02 09:11:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:17,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448802096] [2024-02-02 09:11:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:17,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448802096] [2024-02-02 09:11:17,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448802096] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:17,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50145839] [2024-02-02 09:11:17,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-02 09:11:17,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:17,224 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) [2024-02-02 09:11:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 09:11:17,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-02 09:11:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:11:17,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-02 09:11:17,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:17,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-02 09:11:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:17,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50145839] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:17,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:17,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-02-02 09:11:17,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128619582] [2024-02-02 09:11:17,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:17,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-02 09:11:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-02 09:11:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-02-02 09:11:17,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:17,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 30 transitions, 130 flow. Second operand has 20 states, 20 states have (on average 17.05) internal successors, (341), 20 states have internal predecessors, (341), 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) [2024-02-02 09:11:17,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:17,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:17,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:17,670 INFO L124 PetriNetUnfolderBase]: 19/68 cut-off events. [2024-02-02 09:11:17,670 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-02-02 09:11:17,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 68 events. 19/68 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 7 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 204. Up to 33 conditions per place. [2024-02-02 09:11:17,671 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 8 changer transitions 1/39 dead transitions. [2024-02-02 09:11:17,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 39 transitions, 232 flow [2024-02-02 09:11:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:11:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:11:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-02-02 09:11:17,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-02-02 09:11:17,673 INFO L175 Difference]: Start difference. First operand has 46 places, 30 transitions, 130 flow. Second operand 9 states and 161 transitions. [2024-02-02 09:11:17,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 39 transitions, 232 flow [2024-02-02 09:11:17,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 39 transitions, 214 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-02 09:11:17,675 INFO L231 Difference]: Finished difference. Result has 51 places, 32 transitions, 154 flow [2024-02-02 09:11:17,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=154, PETRI_PLACES=51, PETRI_TRANSITIONS=32} [2024-02-02 09:11:17,675 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2024-02-02 09:11:17,676 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 32 transitions, 154 flow [2024-02-02 09:11:17,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.05) internal successors, (341), 20 states have internal predecessors, (341), 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) [2024-02-02 09:11:17,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:17,676 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:17,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:17,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:17,888 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:17,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash -101116870, now seen corresponding path program 4 times [2024-02-02 09:11:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:17,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590607723] [2024-02-02 09:11:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:18,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:18,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590607723] [2024-02-02 09:11:18,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590607723] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:18,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767636435] [2024-02-02 09:11:18,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-02 09:11:18,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:18,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:18,088 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) [2024-02-02 09:11:18,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 09:11:18,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-02 09:11:18,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:11:18,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-02 09:11:18,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:18,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-02 09:11:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:18,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:18,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767636435] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:18,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:18,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-02-02 09:11:18,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828087305] [2024-02-02 09:11:18,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-02 09:11:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-02 09:11:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-02-02 09:11:18,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 32 transitions, 154 flow. Second operand has 23 states, 23 states have (on average 16.91304347826087) internal successors, (389), 23 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) [2024-02-02 09:11:18,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:18,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:18,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:18,693 INFO L124 PetriNetUnfolderBase]: 21/74 cut-off events. [2024-02-02 09:11:18,693 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-02-02 09:11:18,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 74 events. 21/74 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 7 based on Foata normal form. 2/74 useless extension candidates. Maximal degree in co-relation 242. Up to 33 conditions per place. [2024-02-02 09:11:18,694 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 27 selfloop transitions, 9 changer transitions 1/42 dead transitions. [2024-02-02 09:11:18,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 270 flow [2024-02-02 09:11:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-02 09:11:18,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-02 09:11:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-02-02 09:11:18,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2024-02-02 09:11:18,696 INFO L175 Difference]: Start difference. First operand has 51 places, 32 transitions, 154 flow. Second operand 10 states and 178 transitions. [2024-02-02 09:11:18,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 270 flow [2024-02-02 09:11:18,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 246 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-02 09:11:18,698 INFO L231 Difference]: Finished difference. Result has 56 places, 34 transitions, 178 flow [2024-02-02 09:11:18,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=56, PETRI_TRANSITIONS=34} [2024-02-02 09:11:18,698 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2024-02-02 09:11:18,699 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 34 transitions, 178 flow [2024-02-02 09:11:18,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 16.91304347826087) internal successors, (389), 23 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) [2024-02-02 09:11:18,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:18,699 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:18,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:18,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:18,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:18,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1081236105, now seen corresponding path program 5 times [2024-02-02 09:11:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:18,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143468952] [2024-02-02 09:11:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:18,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143468952] [2024-02-02 09:11:19,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143468952] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008594048] [2024-02-02 09:11:19,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-02 09:11:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:19,143 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) [2024-02-02 09:11:19,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 09:11:19,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-02-02 09:11:19,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:11:19,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-02 09:11:19,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:19,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-02 09:11:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:19,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:19,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008594048] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:19,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:19,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-02-02 09:11:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844672560] [2024-02-02 09:11:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-02 09:11:19,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-02 09:11:19,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-02-02 09:11:19,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:19,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 34 transitions, 178 flow. Second operand has 26 states, 26 states have (on average 16.807692307692307) internal successors, (437), 26 states have internal predecessors, (437), 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) [2024-02-02 09:11:19,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:19,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:19,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:19,800 INFO L124 PetriNetUnfolderBase]: 23/80 cut-off events. [2024-02-02 09:11:19,800 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-02-02 09:11:19,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 80 events. 23/80 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 7 based on Foata normal form. 2/80 useless extension candidates. Maximal degree in co-relation 280. Up to 33 conditions per place. [2024-02-02 09:11:19,801 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 29 selfloop transitions, 10 changer transitions 1/45 dead transitions. [2024-02-02 09:11:19,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 45 transitions, 308 flow [2024-02-02 09:11:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-02 09:11:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-02 09:11:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-02-02 09:11:19,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-02-02 09:11:19,802 INFO L175 Difference]: Start difference. First operand has 56 places, 34 transitions, 178 flow. Second operand 11 states and 195 transitions. [2024-02-02 09:11:19,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 45 transitions, 308 flow [2024-02-02 09:11:19,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 45 transitions, 278 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-02 09:11:19,804 INFO L231 Difference]: Finished difference. Result has 61 places, 36 transitions, 202 flow [2024-02-02 09:11:19,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=202, PETRI_PLACES=61, PETRI_TRANSITIONS=36} [2024-02-02 09:11:19,805 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2024-02-02 09:11:19,805 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 36 transitions, 202 flow [2024-02-02 09:11:19,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.807692307692307) internal successors, (437), 26 states have internal predecessors, (437), 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) [2024-02-02 09:11:19,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:19,805 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:20,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-02 09:11:20,012 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:20,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1916984180, now seen corresponding path program 6 times [2024-02-02 09:11:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629513388] [2024-02-02 09:11:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:20,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629513388] [2024-02-02 09:11:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629513388] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:20,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855439996] [2024-02-02 09:11:20,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-02 09:11:20,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:20,263 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) [2024-02-02 09:11:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-02 09:11:20,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-02-02 09:11:20,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:11:20,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-02 09:11:20,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:20,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-02-02 09:11:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:20,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:20,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855439996] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:11:20,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:11:20,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-02-02 09:11:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840233528] [2024-02-02 09:11:20,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:11:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-02 09:11:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:11:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-02 09:11:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-02-02 09:11:20,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2024-02-02 09:11:20,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 36 transitions, 202 flow. Second operand has 29 states, 29 states have (on average 16.724137931034484) internal successors, (485), 29 states have internal predecessors, (485), 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) [2024-02-02 09:11:20,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:11:20,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2024-02-02 09:11:20,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:11:21,161 INFO L124 PetriNetUnfolderBase]: 25/86 cut-off events. [2024-02-02 09:11:21,163 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-02-02 09:11:21,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 86 events. 25/86 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 7 based on Foata normal form. 2/86 useless extension candidates. Maximal degree in co-relation 318. Up to 33 conditions per place. [2024-02-02 09:11:21,164 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 31 selfloop transitions, 11 changer transitions 1/48 dead transitions. [2024-02-02 09:11:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 48 transitions, 346 flow [2024-02-02 09:11:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-02 09:11:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-02 09:11:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-02-02 09:11:21,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-02-02 09:11:21,166 INFO L175 Difference]: Start difference. First operand has 61 places, 36 transitions, 202 flow. Second operand 12 states and 212 transitions. [2024-02-02 09:11:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 48 transitions, 346 flow [2024-02-02 09:11:21,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 48 transitions, 310 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-02-02 09:11:21,168 INFO L231 Difference]: Finished difference. Result has 66 places, 38 transitions, 226 flow [2024-02-02 09:11:21,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=226, PETRI_PLACES=66, PETRI_TRANSITIONS=38} [2024-02-02 09:11:21,169 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2024-02-02 09:11:21,169 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 38 transitions, 226 flow [2024-02-02 09:11:21,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 16.724137931034484) internal successors, (485), 29 states have internal predecessors, (485), 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) [2024-02-02 09:11:21,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:11:21,170 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:11:21,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-02 09:11:21,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:21,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 9 more)] === [2024-02-02 09:11:21,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:11:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1283622449, now seen corresponding path program 7 times [2024-02-02 09:11:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:11:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346293826] [2024-02-02 09:11:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:11:21,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:11:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:11:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346293826] [2024-02-02 09:11:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346293826] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:11:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873431109] [2024-02-02 09:11:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-02 09:11:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:11:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:11:22,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:11:22,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-02 09:11:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:11:22,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2024-02-02 09:11:22,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:11:22,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-02-02 09:11:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-02 09:11:22,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-02 09:11:22,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-02 09:11:22,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-02 09:11:22,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-02 09:11:22,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-02 09:11:22,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,678 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-02-02 09:11:22,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-02-02 09:11:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:11:22,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:11:23,223 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| Int)) (or (forall ((v_ArrVal_337 Int)) (= 66 (select (select (store |c_#memory_int#4| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (select |c_#memory_int#4| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_337)) c_~v~0.base) c_~v~0.offset))) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 1)))) is different from false [2024-02-02 09:13:14,658 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_335 Int) (v_ArrVal_334 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| Int) (v_ArrVal_332 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| Int) (v_ArrVal_329 Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| Int) (|v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| Int) (v_ArrVal_337 Int)) (or (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| 1)) (= (select (select (store |c_#memory_int#4| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base| (store (store (store (store (store (select |c_#memory_int#4| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.base|) (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_329) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_332) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_334) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_335) (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_dest#1.offset|) v_ArrVal_337)) c_~v~0.base) c_~v~0.offset) 66) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_84| (+ |c_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_81| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| 1)) (< |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_82| (+ |v_thread2Thread1of1ForFork0_#Ultimate.C_strcpy_#t~offset13#1_83| 1)))) is different from false [2024-02-02 09:18:33,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105021418 treesize of output 104955882 [2024-02-02 09:19:18,144 WARN L293 SmtUtils]: Spent 45.08s on a formula simplification. DAG size of input: 6615 DAG size of output: 453 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-02-02 09:19:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 17 refuted. 16 times theorem prover too weak. 0 trivial. 14 not checked. [2024-02-02 09:19:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873431109] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:19:26,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:19:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 40 [2024-02-02 09:19:26,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727404357] [2024-02-02 09:19:26,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:19:26,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-02-02 09:19:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-02-02 09:19:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1056, Unknown=99, NotChecked=150, Total=1640 [2024-02-02 09:19:26,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-02-02 09:19:26,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 38 transitions, 226 flow. Second operand has 41 states, 41 states have (on average 12.78048780487805) internal successors, (524), 41 states have internal predecessors, (524), 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) [2024-02-02 09:19:26,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:26,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-02-02 09:19:26,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:28,429 INFO L124 PetriNetUnfolderBase]: 23/82 cut-off events. [2024-02-02 09:19:28,429 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-02-02 09:19:28,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 82 events. 23/82 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 2 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 306. Up to 20 conditions per place. [2024-02-02 09:19:28,430 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2024-02-02 09:19:28,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 46 transitions, 326 flow [2024-02-02 09:19:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-02 09:19:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-02 09:19:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 196 transitions. [2024-02-02 09:19:28,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-02-02 09:19:28,431 INFO L175 Difference]: Start difference. First operand has 66 places, 38 transitions, 226 flow. Second operand 14 states and 196 transitions. [2024-02-02 09:19:28,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 46 transitions, 326 flow [2024-02-02 09:19:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 46 transitions, 284 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-02-02 09:19:28,433 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2024-02-02 09:19:28,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2024-02-02 09:19:28,434 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 34 predicate places. [2024-02-02 09:19:28,434 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2024-02-02 09:19:28,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 12.78048780487805) internal successors, (524), 41 states have internal predecessors, (524), 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) [2024-02-02 09:19:28,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 12 remaining) [2024-02-02 09:19:28,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 12 remaining) [2024-02-02 09:19:28,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 12 remaining) [2024-02-02 09:19:28,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (6 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 12 remaining) [2024-02-02 09:19:28,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 12 remaining) [2024-02-02 09:19:28,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 12 remaining) [2024-02-02 09:19:28,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-02 09:19:28,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:19:28,641 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1] [2024-02-02 09:19:28,645 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-02 09:19:28,645 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-02 09:19:28,648 INFO L503 ceAbstractionStarter]: Automizer considered 5 witness invariants [2024-02-02 09:19:28,648 INFO L504 ceAbstractionStarter]: WitnessConsidered=5 [2024-02-02 09:19:28,649 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 09:19:28 BasicIcfg [2024-02-02 09:19:28,649 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-02 09:19:28,650 INFO L158 Benchmark]: Toolchain (without parser) took 495812.82ms. Allocated memory was 130.0MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 54.3MB in the beginning and 980.5MB in the end (delta: -926.2MB). Peak memory consumption was 447.2MB. Max. memory is 16.1GB. [2024-02-02 09:19:28,650 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 130.0MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 09:19:28,650 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 130.0MB. Free memory was 57.0MB in the beginning and 56.8MB in the end (delta: 146.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-02 09:19:28,650 INFO L158 Benchmark]: CACSL2BoogieTranslator took 566.81ms. Allocated memory was 130.0MB in the beginning and 169.9MB in the end (delta: 39.8MB). Free memory was 54.0MB in the beginning and 110.9MB in the end (delta: -56.9MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2024-02-02 09:19:28,650 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.35ms. Allocated memory is still 169.9MB. Free memory was 110.9MB in the beginning and 108.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-02 09:19:28,651 INFO L158 Benchmark]: Boogie Preprocessor took 37.00ms. Allocated memory is still 169.9MB. Free memory was 108.2MB in the beginning and 105.3MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-02-02 09:19:28,651 INFO L158 Benchmark]: RCFGBuilder took 409.37ms. Allocated memory is still 169.9MB. Free memory was 105.3MB in the beginning and 79.4MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-02-02 09:19:28,651 INFO L158 Benchmark]: TraceAbstraction took 494755.75ms. Allocated memory was 169.9MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 78.1MB in the beginning and 980.5MB in the end (delta: -902.5MB). Peak memory consumption was 428.8MB. Max. memory is 16.1GB. [2024-02-02 09:19:28,652 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 130.0MB. Free memory is still 90.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 130.0MB. Free memory was 57.0MB in the beginning and 56.8MB in the end (delta: 146.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 566.81ms. Allocated memory was 130.0MB in the beginning and 169.9MB in the end (delta: 39.8MB). Free memory was 54.0MB in the beginning and 110.9MB in the end (delta: -56.9MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.35ms. Allocated memory is still 169.9MB. Free memory was 110.9MB in the beginning and 108.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.00ms. Allocated memory is still 169.9MB. Free memory was 108.2MB in the beginning and 105.3MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 409.37ms. Allocated memory is still 169.9MB. Free memory was 105.3MB in the beginning and 79.4MB in the end (delta: 25.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 494755.75ms. Allocated memory was 169.9MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 78.1MB in the beginning and 980.5MB in the end (delta: -902.5MB). Peak memory consumption was 428.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1111]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1112]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1116]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1117]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1122]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 1107]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 494.6s, OverallIterations: 12, TraceHistogramMax: 8, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 417 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 395 mSDsluCounter, 247 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 70 IncrementalHoareTripleChecker+Unchecked, 229 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3021 IncrementalHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 18 mSDtfsCounter, 3021 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 320 SyntacticMatches, 15 SemanticMatches, 224 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 432.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=226occurred in iteration=11, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 488.4s InterpolantComputationTime, 480 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 664 ConstructedInterpolants, 14 QuantifiedInterpolants, 6222 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1561 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 65/504 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-02 09:19:28,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE