./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/circular_buffer_bad.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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-deagle/circular_buffer_bad.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/circular_buffer_bad.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 18:18:08,985 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 18:18:09,034 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 18:18:09,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 18:18:09,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 18:18:09,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 18:18:09,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 18:18:09,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 18:18:09,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 18:18:09,127 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 18:18:09,127 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 18:18:09,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 18:18:09,129 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 18:18:09,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 18:18:09,130 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 18:18:09,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 18:18:09,130 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 18:18:09,131 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 18:18:09,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 18:18:09,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 18:18:09,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 18:18:09,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 18:18:09,134 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 18:18:09,134 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 18:18:09,139 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 18:18:09,139 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 18:18:09,139 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 18:18:09,139 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 18:18:09,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 18:18:09,140 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 18:18:09,141 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 18:18:09,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 18:18:09,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 18:18:09,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 18:18:09,142 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 18:18:09,142 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 18:18:09,142 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 18:18:09,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 18:18:09,142 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 18:18:09,143 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 18:18:09,143 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 18:18:09,145 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 18:18:09,145 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 18:18:09,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 18:18:09,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 18:18:09,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 18:18:09,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 18:18:09,482 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 18:18:09,483 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 18:18:09,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-06-04 18:18:10,533 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 18:18:10,750 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 18:18:10,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-06-04 18:18:10,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e77f21f/0a4785181ab04692aac32930deaae4b1/FLAG7bdc98d78 [2024-06-04 18:18:11,091 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e77f21f/0a4785181ab04692aac32930deaae4b1 [2024-06-04 18:18:11,093 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 18:18:11,094 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 18:18:11,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/circular_buffer_bad.yml/witness.yml [2024-06-04 18:18:11,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 18:18:11,207 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 18:18:11,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 18:18:11,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 18:18:11,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 18:18:11,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 06:18:11" (1/2) ... [2024-06-04 18:18:11,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4201067e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 06:18:11, skipping insertion in model container [2024-06-04 18:18:11,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 06:18:11" (1/2) ... [2024-06-04 18:18:11,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e994473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 06:18:11, skipping insertion in model container [2024-06-04 18:18:11,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 06:18:11" (2/2) ... [2024-06-04 18:18:11,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4201067e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11, skipping insertion in model container [2024-06-04 18:18:11,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 06:18:11" (2/2) ... [2024-06-04 18:18:11,222 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 18:18:11,245 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 18:18:11,247 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] ! multithreaded || (m_locked || ((((((((((((-10LL + (long long )buffer_size) + (long long )send >= 0LL && (-10LL + (long long )buffer_size) + (long long )receive >= 0LL) && (-1LL + (long long )receive) + (long long )send >= 0LL) && (1LL - (long long )receive) + (long long )send >= 0LL) && (10LL - (long long )buffer_size) + (long long )send >= 0LL) && (10LL - (long long )buffer_size) + (long long )receive >= 0LL) && (-9LL + (long long )buffer_size) - (long long )send >= 0LL) && (-9LL + (long long )buffer_size) - (long long )receive >= 0LL) && (1LL + (long long )receive) - (long long )send >= 0LL) && (1LL - (long long )receive) - (long long )send >= 0LL) && (11LL - (long long )buffer_size) - (long long )send >= 0LL) && (11LL - (long long )buffer_size) - (long long )receive >= 0LL)) [2024-06-04 18:18:11,247 INFO L97 edCorrectnessWitness]: Location invariant before [L763-L763] ! multithreaded || (m_locked || ((((((((((((-10LL + (long long )buffer_size) + (long long )send >= 0LL && (-10LL + (long long )buffer_size) + (long long )receive >= 0LL) && (-1LL + (long long )receive) + (long long )send >= 0LL) && (1LL - (long long )receive) + (long long )send >= 0LL) && (10LL - (long long )buffer_size) + (long long )send >= 0LL) && (10LL - (long long )buffer_size) + (long long )receive >= 0LL) && (-9LL + (long long )buffer_size) - (long long )send >= 0LL) && (-9LL + (long long )buffer_size) - (long long )receive >= 0LL) && (1LL + (long long )receive) - (long long )send >= 0LL) && (1LL - (long long )receive) - (long long )send >= 0LL) && (11LL - (long long )buffer_size) - (long long )send >= 0LL) && (11LL - (long long )buffer_size) - (long long )receive >= 0LL)) [2024-06-04 18:18:11,247 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-04 18:18:11,247 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 18:18:11,247 INFO L106 edCorrectnessWitness]: ghost_update [L761-L761] multithreaded = 1; [2024-06-04 18:18:11,248 INFO L106 edCorrectnessWitness]: ghost_update [L742-L742] m_locked = 1; [2024-06-04 18:18:11,248 INFO L106 edCorrectnessWitness]: ghost_update [L726-L726] m_locked = 1; [2024-06-04 18:18:11,248 INFO L106 edCorrectnessWitness]: ghost_update [L750-L750] m_locked = 0; [2024-06-04 18:18:11,248 INFO L106 edCorrectnessWitness]: ghost_update [L733-L733] m_locked = 0; [2024-06-04 18:18:11,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 18:18:11,600 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 18:18:11,609 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 18:18:11,711 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 18:18:11,736 INFO L206 MainTranslator]: Completed translation [2024-06-04 18:18:11,737 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11 WrapperNode [2024-06-04 18:18:11,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 18:18:11,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 18:18:11,739 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 18:18:11,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 18:18:11,744 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 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,759 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 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,783 INFO L138 Inliner]: procedures = 168, calls = 30, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 143 [2024-06-04 18:18:11,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 18:18:11,785 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 18:18:11,785 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 18:18:11,785 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 18:18:11,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,814 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 1, 3, 8]. 57 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-06-04 18:18:11,814 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 18:18:11,837 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 18:18:11,837 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 18:18:11,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 18:18:11,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (1/1) ... [2024-06-04 18:18:11,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 18:18:11,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 18:18:11,886 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) [2024-06-04 18:18:11,918 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 [2024-06-04 18:18:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-04 18:18:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-04 18:18:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-04 18:18:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-04 18:18:11,929 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-04 18:18:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-04 18:18:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-04 18:18:11,930 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-04 18:18:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-04 18:18:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-04 18:18:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-04 18:18:11,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-06-04 18:18:11,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 18:18:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-04 18:18:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-04 18:18:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-04 18:18:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-04 18:18:11,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 18:18:11,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 18:18:11,933 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 18:18:12,043 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 18:18:12,045 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 18:18:12,322 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 18:18:12,323 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 18:18:12,475 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 18:18:12,475 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-04 18:18:12,477 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 06:18:12 BoogieIcfgContainer [2024-06-04 18:18:12,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 18:18:12,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 18:18:12,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 18:18:12,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 18:18:12,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 06:18:11" (1/4) ... [2024-06-04 18:18:12,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a1a022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 06:18:12, skipping insertion in model container [2024-06-04 18:18:12,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 06:18:11" (2/4) ... [2024-06-04 18:18:12,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a1a022 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 06:18:12, skipping insertion in model container [2024-06-04 18:18:12,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 06:18:11" (3/4) ... [2024-06-04 18:18:12,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a1a022 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 06:18:12, skipping insertion in model container [2024-06-04 18:18:12,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 06:18:12" (4/4) ... [2024-06-04 18:18:12,486 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-06-04 18:18:12,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 18:18:12,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-04 18:18:12,501 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 18:18:12,568 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-04 18:18:12,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 30 transitions, 74 flow [2024-06-04 18:18:12,627 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-06-04 18:18:12,627 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-04 18:18:12,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 43 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-04 18:18:12,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 30 transitions, 74 flow [2024-06-04 18:18:12,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 61 flow [2024-06-04 18:18:12,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 18:18:12,653 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;@12a3c1a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 18:18:12,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-04 18:18:12,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 18:18:12,658 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 18:18:12,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 18:18:12,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 18:18:12,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 18:18:12,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 18:18:12,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 18:18:12,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1085435173, now seen corresponding path program 1 times [2024-06-04 18:18:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 18:18:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056967980] [2024-06-04 18:18:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 18:18:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 18:18:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 18:18:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 18:18:13,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056967980] [2024-06-04 18:18:13,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056967980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 18:18:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 18:18:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 18:18:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743026408] [2024-06-04 18:18:13,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 18:18:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 18:18:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 18:18:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 18:18:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 18:18:13,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 18:18:13,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2024-06-04 18:18:13,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 18:18:13,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 18:18:13,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 18:18:13,360 INFO L124 PetriNetUnfolderBase]: 267/485 cut-off events. [2024-06-04 18:18:13,360 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-04 18:18:13,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 485 events. 267/485 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2012 event pairs, 95 based on Foata normal form. 24/498 useless extension candidates. Maximal degree in co-relation 899. Up to 308 conditions per place. [2024-06-04 18:18:13,365 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 32 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2024-06-04 18:18:13,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 169 flow [2024-06-04 18:18:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 18:18:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 18:18:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-04 18:18:13,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 18:18:13,376 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 61 flow. Second operand 3 states and 54 transitions. [2024-06-04 18:18:13,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 169 flow [2024-06-04 18:18:13,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 18:18:13,380 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 67 flow [2024-06-04 18:18:13,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-06-04 18:18:13,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-06-04 18:18:13,384 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 67 flow [2024-06-04 18:18:13,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2024-06-04 18:18:13,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 18:18:13,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 18:18:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 18:18:13,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 18:18:13,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 18:18:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1855552493, now seen corresponding path program 1 times [2024-06-04 18:18:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 18:18:13,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561453403] [2024-06-04 18:18:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 18:18:13,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-04 18:18:13,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94261515] [2024-06-04 18:18:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:13,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 18:18:13,402 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) [2024-06-04 18:18:13,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-04 18:18:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 18:18:13,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2024-06-04 18:18:13,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 18:18:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 18:18:13,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-04 18:18:13,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 18:18:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561453403] [2024-06-04 18:18:13,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-04 18:18:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94261515] [2024-06-04 18:18:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94261515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 18:18:13,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 18:18:13,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 18:18:13,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642903869] [2024-06-04 18:18:13,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 18:18:13,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 18:18:13,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 18:18:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 18:18:13,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 18:18:13,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 18:18:13,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-06-04 18:18:13,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 18:18:13,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 18:18:13,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 18:18:13,733 INFO L124 PetriNetUnfolderBase]: 304/561 cut-off events. [2024-06-04 18:18:13,734 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-06-04 18:18:13,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 561 events. 304/561 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2339 event pairs, 123 based on Foata normal form. 20/576 useless extension candidates. Maximal degree in co-relation 574. Up to 303 conditions per place. [2024-06-04 18:18:13,740 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 36 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 18:18:13,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 188 flow [2024-06-04 18:18:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 18:18:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 18:18:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-06-04 18:18:13,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 18:18:13,743 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 67 flow. Second operand 3 states and 55 transitions. [2024-06-04 18:18:13,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 188 flow [2024-06-04 18:18:13,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 18:18:13,747 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 101 flow [2024-06-04 18:18:13,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-06-04 18:18:13,748 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2024-06-04 18:18:13,748 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 101 flow [2024-06-04 18:18:13,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-06-04 18:18:13,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 18:18:13,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 18:18:13,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-04 18:18:13,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:13,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 18:18:13,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 18:18:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1687792392, now seen corresponding path program 1 times [2024-06-04 18:18:13,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 18:18:13,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294397386] [2024-06-04 18:18:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:13,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 18:18:13,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-04 18:18:13,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459857334] [2024-06-04 18:18:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:13,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 18:18:14,006 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) [2024-06-04 18:18:14,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-04 18:18:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 18:18:14,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-04 18:18:14,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 18:18:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 18:18:14,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-04 18:18:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 18:18:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294397386] [2024-06-04 18:18:14,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-04 18:18:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459857334] [2024-06-04 18:18:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459857334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 18:18:14,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 18:18:14,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 18:18:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513590561] [2024-06-04 18:18:14,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 18:18:14,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 18:18:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 18:18:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 18:18:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 18:18:14,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 18:18:14,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2024-06-04 18:18:14,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 18:18:14,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 18:18:14,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 18:18:14,521 INFO L124 PetriNetUnfolderBase]: 396/742 cut-off events. [2024-06-04 18:18:14,523 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-06-04 18:18:14,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1890 conditions, 742 events. 396/742 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3124 event pairs, 69 based on Foata normal form. 42/783 useless extension candidates. Maximal degree in co-relation 1733. Up to 314 conditions per place. [2024-06-04 18:18:14,528 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 52 selfloop transitions, 5 changer transitions 1/61 dead transitions. [2024-06-04 18:18:14,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 61 transitions, 321 flow [2024-06-04 18:18:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 18:18:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 18:18:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-04 18:18:14,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-06-04 18:18:14,532 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 101 flow. Second operand 5 states and 76 transitions. [2024-06-04 18:18:14,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 61 transitions, 321 flow [2024-06-04 18:18:14,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 18:18:14,537 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 120 flow [2024-06-04 18:18:14,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-04 18:18:14,538 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-04 18:18:14,539 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 120 flow [2024-06-04 18:18:14,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2024-06-04 18:18:14,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 18:18:14,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 18:18:14,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-04 18:18:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-04 18:18:14,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 18:18:14,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 18:18:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1508298853, now seen corresponding path program 1 times [2024-06-04 18:18:14,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 18:18:14,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115697373] [2024-06-04 18:18:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:14,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 18:18:14,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-04 18:18:14,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850070467] [2024-06-04 18:18:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 18:18:14,809 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) [2024-06-04 18:18:14,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-04 18:18:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 18:18:14,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-04 18:18:14,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 18:18:14,963 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 [2024-06-04 18:18:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 18:18:14,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-04 18:18:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 18:18:14,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115697373] [2024-06-04 18:18:14,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-04 18:18:14,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850070467] [2024-06-04 18:18:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850070467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 18:18:14,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 18:18:14,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 18:18:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660162494] [2024-06-04 18:18:14,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 18:18:14,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 18:18:14,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 18:18:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 18:18:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 18:18:14,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-04 18:18:14,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-04 18:18:14,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 18:18:14,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-04 18:18:14,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 18:18:15,067 INFO L124 PetriNetUnfolderBase]: 211/425 cut-off events. [2024-06-04 18:18:15,069 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-06-04 18:18:15,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 425 events. 211/425 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1535 event pairs, 79 based on Foata normal form. 24/439 useless extension candidates. Maximal degree in co-relation 622. Up to 204 conditions per place. [2024-06-04 18:18:15,071 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 29 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-06-04 18:18:15,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 198 flow [2024-06-04 18:18:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 18:18:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 18:18:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-04 18:18:15,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-04 18:18:15,073 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 120 flow. Second operand 3 states and 53 transitions. [2024-06-04 18:18:15,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 198 flow [2024-06-04 18:18:15,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 191 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 18:18:15,075 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 105 flow [2024-06-04 18:18:15,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-06-04 18:18:15,076 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-04 18:18:15,076 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 105 flow [2024-06-04 18:18:15,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-04 18:18:15,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 18:18:15,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 18:18:15,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-04 18:18:15,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:15,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 18:18:15,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 18:18:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1884684719, now seen corresponding path program 1 times [2024-06-04 18:18:15,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 18:18:15,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707140643] [2024-06-04 18:18:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:15,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 18:18:15,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-04 18:18:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619053183] [2024-06-04 18:18:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 18:18:15,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 18:18:15,303 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) [2024-06-04 18:18:15,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-04 18:18:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 18:18:15,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-04 18:18:15,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-04 18:18:15,545 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 8 treesize of output 1 [2024-06-04 18:18:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 18:18:16,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-04 18:18:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 18:18:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707140643] [2024-06-04 18:18:16,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-04 18:18:16,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619053183] [2024-06-04 18:18:16,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619053183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 18:18:16,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 18:18:16,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 18:18:16,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727128982] [2024-06-04 18:18:16,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 18:18:16,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 18:18:16,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 18:18:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 18:18:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 18:18:16,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-04 18:18:16,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 105 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) [2024-06-04 18:18:16,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 18:18:16,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-04 18:18:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 18:18:16,273 INFO L124 PetriNetUnfolderBase]: 178/352 cut-off events. [2024-06-04 18:18:16,273 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-06-04 18:18:16,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 352 events. 178/352 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1269 event pairs, 27 based on Foata normal form. 9/360 useless extension candidates. Maximal degree in co-relation 759. Up to 108 conditions per place. [2024-06-04 18:18:16,274 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2024-06-04 18:18:16,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 294 flow [2024-06-04 18:18:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 18:18:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 18:18:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-04 18:18:16,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 18:18:16,278 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 105 flow. Second operand 7 states and 90 transitions. [2024-06-04 18:18:16,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 294 flow [2024-06-04 18:18:16,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 18:18:16,280 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2024-06-04 18:18:16,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2024-06-04 18:18:16,282 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-06-04 18:18:16,282 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2024-06-04 18:18:16,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) [2024-06-04 18:18:16,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-04 18:18:16,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-04 18:18:16,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-04 18:18:16,286 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-04 18:18:16,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-04 18:18:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-04 18:18:16,498 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-06-04 18:18:16,504 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 18:18:16,505 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 18:18:16,509 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-04 18:18:16,510 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-04 18:18:16,511 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 06:18:16 BasicIcfg [2024-06-04 18:18:16,511 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 18:18:16,512 INFO L158 Benchmark]: Toolchain (without parser) took 5305.41ms. Allocated memory was 230.7MB in the beginning and 295.7MB in the end (delta: 65.0MB). Free memory was 198.3MB in the beginning and 213.0MB in the end (delta: -14.6MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. [2024-06-04 18:18:16,512 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory was 99.2MB in the beginning and 99.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 18:18:16,513 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 230.7MB. Free memory was 201.5MB in the beginning and 201.5MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 18:18:16,513 INFO L158 Benchmark]: CACSL2BoogieTranslator took 524.53ms. Allocated memory is still 230.7MB. Free memory was 200.7MB in the beginning and 174.4MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-04 18:18:16,513 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.71ms. Allocated memory is still 230.7MB. Free memory was 174.4MB in the beginning and 171.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-04 18:18:16,513 INFO L158 Benchmark]: Boogie Preprocessor took 51.49ms. Allocated memory is still 230.7MB. Free memory was 171.3MB in the beginning and 168.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 18:18:16,514 INFO L158 Benchmark]: RCFGBuilder took 640.20ms. Allocated memory is still 230.7MB. Free memory was 168.2MB in the beginning and 114.7MB in the end (delta: 53.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2024-06-04 18:18:16,514 INFO L158 Benchmark]: TraceAbstraction took 4031.83ms. Allocated memory was 230.7MB in the beginning and 295.7MB in the end (delta: 65.0MB). Free memory was 113.6MB in the beginning and 213.0MB in the end (delta: -99.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 18:18:16,515 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory was 99.2MB in the beginning and 99.0MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 230.7MB. Free memory was 201.5MB in the beginning and 201.5MB in the end (delta: 36.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 524.53ms. Allocated memory is still 230.7MB. Free memory was 200.7MB in the beginning and 174.4MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.71ms. Allocated memory is still 230.7MB. Free memory was 174.4MB in the beginning and 171.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.49ms. Allocated memory is still 230.7MB. Free memory was 171.3MB in the beginning and 168.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 640.20ms. Allocated memory is still 230.7MB. Free memory was 168.2MB in the beginning and 114.7MB in the end (delta: 53.5MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4031.83ms. Allocated memory was 230.7MB in the beginning and 295.7MB in the end (delta: 65.0MB). Free memory was 113.6MB in the beginning and 213.0MB in the end (delta: -99.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 762]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 763]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 45 locations, 4 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: 3.9s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 155 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 138 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 413 IncrementalHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 8 mSDtfsCounter, 413 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=3, InterpolantAutomatonStates: 21, 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, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 59 ConstructedInterpolants, 8 QuantifiedInterpolants, 844 SizeOfPredicates, 19 NumberOfNonLiveVariables, 588 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 18:18:16,531 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