./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.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_ok.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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_ok.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/circular_buffer_ok.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-cde23df-m [2024-06-14 14:21:32,211 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:21:32,263 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:21:32,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:21:32,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:21:32,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:21:32,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:21:32,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:21:32,294 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:21:32,297 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:21:32,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:21:32,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:21:32,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:21:32,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:21:32,299 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:21:32,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:21:32,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:21:32,300 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:21:32,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:21:32,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:21:32,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:21:32,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:21:32,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:21:32,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:21:32,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:21:32,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:21:32,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:21:32,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:21:32,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:21:32,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:21:32,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:21:32,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:21:32,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:21:32,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:21:32,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:21:32,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:21:32,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:21:32,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:21:32,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:21:32,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:21:32,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:21:32,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:21:32,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:21:32,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:21:32,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:21:32,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:21:32,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:21:32,546 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:21:32,547 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:21:32,548 INFO L431 ainManager$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_ok.yml/witness.yml [2024-06-14 14:21:32,626 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:21:32,626 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:21:32,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-06-14 14:21:33,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:21:33,867 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:21:33,867 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-06-14 14:21:33,876 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578c39e6d/d7a3ffd658a74817a5776cd600033340/FLAG17471aacd [2024-06-14 14:21:33,885 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578c39e6d/d7a3ffd658a74817a5776cd600033340 [2024-06-14 14:21:33,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:21:33,886 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:21:33,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:21:33,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:21:33,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:21:33,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:21:32" (1/2) ... [2024-06-14 14:21:33,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c51ce71 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:21:33, skipping insertion in model container [2024-06-14 14:21:33,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:21:32" (1/2) ... [2024-06-14 14:21:33,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@318f4414 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:21:33, skipping insertion in model container [2024-06-14 14:21:33,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:21:33" (2/2) ... [2024-06-14 14:21:33,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c51ce71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:33, skipping insertion in model container [2024-06-14 14:21:33,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:21:33" (2/2) ... [2024-06-14 14:21:33,898 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:21:33,928 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:21:33,929 INFO L97 edCorrectnessWitness]: Location invariant before [L765-L765] ((! multithreaded || (m_locked || (((((((((((((((-10LL + (long long )buffer_size) + (long long )send >= 0LL && (-10LL + (long long )buffer_size) + (long long )value >= 0LL) && (-1LL + (long long )receive) + (long long )send >= 0LL) && (1LL - (long long )receive) + (long long )send >= 0LL) && (1LL - (long long )receive) + (long long )value >= 0LL) && (10LL - (long long )buffer_size) + (long long )send >= 0LL) && (10LL - (long long )buffer_size) + (long long )value >= 0LL) && (long long )send + (long long )value >= 0LL) && (-9LL + (long long )buffer_size) - (long long )receive >= 0LL) && (-4LL + (long long )buffer_size) - (long long )value >= 0LL) && (6LL + (long long )send) - (long long )value >= 0LL) && (1LL - (long long )receive) - (long long )send >= 0LL) && (7LL - (long long )receive) - (long long )value >= 0LL) && (11LL - (long long )buffer_size) - (long long )receive >= 0LL) && (16LL - (long long )buffer_size) - (long long )value >= 0LL))) && (! multithreaded || ((0 <= value && value <= 6) && value <= 127))) && (! multithreaded || (m_locked || (0 <= value && value <= 127))) [2024-06-14 14:21:33,930 INFO L97 edCorrectnessWitness]: Location invariant before [L764-L764] ((! multithreaded || (m_locked || (((((((((((((((-10LL + (long long )buffer_size) + (long long )send >= 0LL && (-10LL + (long long )buffer_size) + (long long )value >= 0LL) && (-1LL + (long long )receive) + (long long )send >= 0LL) && (1LL - (long long )receive) + (long long )send >= 0LL) && (1LL - (long long )receive) + (long long )value >= 0LL) && (10LL - (long long )buffer_size) + (long long )send >= 0LL) && (10LL - (long long )buffer_size) + (long long )value >= 0LL) && (long long )send + (long long )value >= 0LL) && (-9LL + (long long )buffer_size) - (long long )receive >= 0LL) && (-4LL + (long long )buffer_size) - (long long )value >= 0LL) && (6LL + (long long )send) - (long long )value >= 0LL) && (1LL - (long long )receive) - (long long )send >= 0LL) && (7LL - (long long )receive) - (long long )value >= 0LL) && (11LL - (long long )buffer_size) - (long long )receive >= 0LL) && (16LL - (long long )buffer_size) - (long long )value >= 0LL))) && (! multithreaded || ((0 <= value && value <= 6) && value <= 127))) && (! multithreaded || (m_locked || (0 <= value && value <= 127))) [2024-06-14 14:21:33,930 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:21:33,930 INFO L103 edCorrectnessWitness]: ghost_variable m_locked = 0 [2024-06-14 14:21:33,930 INFO L106 edCorrectnessWitness]: ghost_update [L745-L745] m_locked = 1; [2024-06-14 14:21:33,931 INFO L106 edCorrectnessWitness]: ghost_update [L727-L727] m_locked = 1; [2024-06-14 14:21:33,931 INFO L106 edCorrectnessWitness]: ghost_update [L763-L763] multithreaded = 1; [2024-06-14 14:21:33,931 INFO L106 edCorrectnessWitness]: ghost_update [L736-L736] m_locked = 0; [2024-06-14 14:21:33,931 INFO L106 edCorrectnessWitness]: ghost_update [L753-L753] m_locked = 0; [2024-06-14 14:21:33,968 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:21:34,221 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:21:34,237 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 [2024-06-14 14:21:34,357 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:21:34,391 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:21:34,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34 WrapperNode [2024-06-14 14:21:34,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:21:34,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:21:34,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:21:34,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:21:34,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,422 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,479 INFO L138 Inliner]: procedures = 168, calls = 31, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 152 [2024-06-14 14:21:34,496 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:21:34,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:21:34,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:21:34,497 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:21:34,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,508 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,520 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]. [2024-06-14 14:21:34,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:21:34,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:21:34,554 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:21:34,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:21:34,555 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (1/1) ... [2024-06-14 14:21:34,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:21:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:34,687 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) [2024-06-14 14:21:34,688 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 [2024-06-14 14:21:34,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 14:21:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 14:21:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-14 14:21:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-14 14:21:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-14 14:21:34,732 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-14 14:21:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-14 14:21:34,733 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-14 14:21:34,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 14:21:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 14:21:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-14 14:21:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-14 14:21:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-14 14:21:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:21:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-06-14 14:21:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-06-14 14:21:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-06-14 14:21:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-06-14 14:21:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:21:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 14:21:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-14 14:21:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-14 14:21:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-14 14:21:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:21:34,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:21:34,739 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:21:34,876 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:21:34,877 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:21:35,215 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:21:35,216 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:21:35,376 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:21:35,376 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-14 14:21:35,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:21:35 BoogieIcfgContainer [2024-06-14 14:21:35,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:21:35,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:21:35,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:21:35,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:21:35,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:21:32" (1/4) ... [2024-06-14 14:21:35,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33730df6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:21:35, skipping insertion in model container [2024-06-14 14:21:35,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:21:33" (2/4) ... [2024-06-14 14:21:35,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33730df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:21:35, skipping insertion in model container [2024-06-14 14:21:35,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:21:34" (3/4) ... [2024-06-14 14:21:35,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33730df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:21:35, skipping insertion in model container [2024-06-14 14:21:35,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:21:35" (4/4) ... [2024-06-14 14:21:35,385 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-06-14 14:21:35,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:21:35,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-14 14:21:35,400 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:21:35,437 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-14 14:21:35,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 30 transitions, 74 flow [2024-06-14 14:21:35,515 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-06-14 14:21:35,515 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-14 14:21:35,518 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 41 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. [2024-06-14 14:21:35,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 30 transitions, 74 flow [2024-06-14 14:21:35,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 61 flow [2024-06-14 14:21:35,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:21:35,554 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;@477d1306, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:21:35,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-14 14:21:35,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:21:35,560 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:21:35,560 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:21:35,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:35,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:21:35,562 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)] === [2024-06-14 14:21:35,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -300262953, now seen corresponding path program 1 times [2024-06-14 14:21:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:35,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032801823] [2024-06-14 14:21:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:36,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:36,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032801823] [2024-06-14 14:21:36,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032801823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:36,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:36,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:21:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961303766] [2024-06-14 14:21:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:36,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:21:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:36,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:21:36,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:21:36,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-14 14:21:36,068 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) [2024-06-14 14:21:36,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:36,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-14 14:21:36,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:36,267 INFO L124 PetriNetUnfolderBase]: 267/482 cut-off events. [2024-06-14 14:21:36,267 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-14 14:21:36,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 482 events. 267/482 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1969 event pairs, 95 based on Foata normal form. 24/499 useless extension candidates. Maximal degree in co-relation 895. Up to 308 conditions per place. [2024-06-14 14:21:36,271 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 32 selfloop transitions, 2 changer transitions 3/40 dead transitions. [2024-06-14 14:21:36,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 169 flow [2024-06-14 14:21:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:21:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:21:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-14 14:21:36,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:21:36,298 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 61 flow. Second operand 3 states and 54 transitions. [2024-06-14 14:21:36,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 169 flow [2024-06-14 14:21:36,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:21:36,304 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 67 flow [2024-06-14 14:21:36,305 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} [2024-06-14 14:21:36,309 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-06-14 14:21:36,309 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 67 flow [2024-06-14 14:21:36,310 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) [2024-06-14 14:21:36,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:36,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:36,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:21:36,311 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)] === [2024-06-14 14:21:36,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1606586641, now seen corresponding path program 1 times [2024-06-14 14:21:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:36,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952245821] [2024-06-14 14:21:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:36,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:36,333 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:21:36,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585328764] [2024-06-14 14:21:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:36,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:36,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:36,336 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) [2024-06-14 14:21:36,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-14 14:21:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:36,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-14 14:21:36,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:36,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-14 14:21:36,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:36,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952245821] [2024-06-14 14:21:36,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:21:36,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585328764] [2024-06-14 14:21:36,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585328764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:36,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:36,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:21:36,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204341632] [2024-06-14 14:21:36,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:21:36,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:21:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:21:36,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-14 14:21:36,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 67 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2024-06-14 14:21:36,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:36,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-14 14:21:36,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:36,828 INFO L124 PetriNetUnfolderBase]: 437/786 cut-off events. [2024-06-14 14:21:36,829 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-14 14:21:36,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 786 events. 437/786 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3429 event pairs, 73 based on Foata normal form. 30/815 useless extension candidates. Maximal degree in co-relation 879. Up to 303 conditions per place. [2024-06-14 14:21:36,833 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 65 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-06-14 14:21:36,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 81 transitions, 354 flow [2024-06-14 14:21:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:21:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:21:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 14:21:36,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-14 14:21:36,835 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 67 flow. Second operand 6 states and 113 transitions. [2024-06-14 14:21:36,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 81 transitions, 354 flow [2024-06-14 14:21:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 81 transitions, 351 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:21:36,837 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 171 flow [2024-06-14 14:21:36,837 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-06-14 14:21:36,838 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-14 14:21:36,838 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 171 flow [2024-06-14 14:21:36,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2024-06-14 14:21:36,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:36,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-14 14:21:37,050 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 [2024-06-14 14:21:37,050 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)] === [2024-06-14 14:21:37,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:37,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1214479301, now seen corresponding path program 1 times [2024-06-14 14:21:37,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:37,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090787505] [2024-06-14 14:21:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:37,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:37,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:21:37,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556748154] [2024-06-14 14:21:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:37,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:37,076 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) [2024-06-14 14:21:37,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-14 14:21:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:37,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-14 14:21:37,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:37,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-14 14:21:37,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090787505] [2024-06-14 14:21:37,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:21:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556748154] [2024-06-14 14:21:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556748154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:37,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:37,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:21:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250865862] [2024-06-14 14:21:37,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:37,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:21:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:21:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:21:37,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-14 14:21:37,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 171 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) [2024-06-14 14:21:37,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:37,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-14 14:21:37,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:37,480 INFO L124 PetriNetUnfolderBase]: 685/1221 cut-off events. [2024-06-14 14:21:37,480 INFO L125 PetriNetUnfolderBase]: For 1290/1294 co-relation queries the response was YES. [2024-06-14 14:21:37,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3747 conditions, 1221 events. 685/1221 cut-off events. For 1290/1294 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5696 event pairs, 95 based on Foata normal form. 70/1291 useless extension candidates. Maximal degree in co-relation 3462. Up to 431 conditions per place. [2024-06-14 14:21:37,487 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 68 selfloop transitions, 8 changer transitions 2/81 dead transitions. [2024-06-14 14:21:37,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 81 transitions, 508 flow [2024-06-14 14:21:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:21:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:21:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-14 14:21:37,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-14 14:21:37,491 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 171 flow. Second operand 5 states and 87 transitions. [2024-06-14 14:21:37,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 81 transitions, 508 flow [2024-06-14 14:21:37,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 81 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 14:21:37,497 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 216 flow [2024-06-14 14:21:37,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-06-14 14:21:37,498 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-14 14:21:37,498 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 216 flow [2024-06-14 14:21:37,499 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) [2024-06-14 14:21:37,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:37,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:37,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-14 14:21:37,711 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 [2024-06-14 14:21:37,712 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)] === [2024-06-14 14:21:37,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash -314589603, now seen corresponding path program 1 times [2024-06-14 14:21:37,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:37,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235300489] [2024-06-14 14:21:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:37,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235300489] [2024-06-14 14:21:37,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-06-14 14:21:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672347198] [2024-06-14 14:21:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:37,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:37,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:37,752 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) [2024-06-14 14:21:37,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-14 14:21:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:37,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-14 14:21:37,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:37,863 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 [2024-06-14 14:21:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:37,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-14 14:21:37,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672347198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:37,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:37,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:21:37,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930074457] [2024-06-14 14:21:37,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:37,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:21:37,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:21:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:21:37,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-14 14:21:37,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 216 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) [2024-06-14 14:21:37,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:37,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-14 14:21:37,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:37,988 INFO L124 PetriNetUnfolderBase]: 429/825 cut-off events. [2024-06-14 14:21:37,990 INFO L125 PetriNetUnfolderBase]: For 866/886 co-relation queries the response was YES. [2024-06-14 14:21:37,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2606 conditions, 825 events. 429/825 cut-off events. For 866/886 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3577 event pairs, 169 based on Foata normal form. 47/844 useless extension candidates. Maximal degree in co-relation 1823. Up to 389 conditions per place. [2024-06-14 14:21:37,995 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 33 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-06-14 14:21:37,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 302 flow [2024-06-14 14:21:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:21:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:21:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-14 14:21:37,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-14 14:21:37,999 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 216 flow. Second operand 3 states and 53 transitions. [2024-06-14 14:21:37,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 302 flow [2024-06-14 14:21:38,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 14:21:38,002 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 196 flow [2024-06-14 14:21:38,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-14 14:21:38,003 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-14 14:21:38,003 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 196 flow [2024-06-14 14:21:38,003 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) [2024-06-14 14:21:38,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:38,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:38,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-14 14:21:38,214 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 [2024-06-14 14:21:38,215 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)] === [2024-06-14 14:21:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 77694902, now seen corresponding path program 1 times [2024-06-14 14:21:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:38,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847901707] [2024-06-14 14:21:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:38,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:21:38,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983179784] [2024-06-14 14:21:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:38,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:38,227 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) [2024-06-14 14:21:38,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-14 14:21:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:38,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-14 14:21:38,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:38,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-14 14:21:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847901707] [2024-06-14 14:21:38,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:21:38,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983179784] [2024-06-14 14:21:38,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983179784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:38,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:38,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:21:38,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552981697] [2024-06-14 14:21:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:38,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:21:38,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:21:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:21:38,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-06-14 14:21:38,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-14 14:21:38,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:38,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-06-14 14:21:38,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:38,684 INFO L124 PetriNetUnfolderBase]: 1156/2111 cut-off events. [2024-06-14 14:21:38,685 INFO L125 PetriNetUnfolderBase]: For 3441/3441 co-relation queries the response was YES. [2024-06-14 14:21:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6971 conditions, 2111 events. 1156/2111 cut-off events. For 3441/3441 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 11627 event pairs, 262 based on Foata normal form. 16/2119 useless extension candidates. Maximal degree in co-relation 1555. Up to 997 conditions per place. [2024-06-14 14:21:38,694 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 53 selfloop transitions, 16 changer transitions 10/81 dead transitions. [2024-06-14 14:21:38,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 81 transitions, 640 flow [2024-06-14 14:21:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:21:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:21:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-06-14 14:21:38,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-14 14:21:38,696 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 196 flow. Second operand 5 states and 71 transitions. [2024-06-14 14:21:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 81 transitions, 640 flow [2024-06-14 14:21:38,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 81 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:21:38,702 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 376 flow [2024-06-14 14:21:38,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2024-06-14 14:21:38,703 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-14 14:21:38,704 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 376 flow [2024-06-14 14:21:38,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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) [2024-06-14 14:21:38,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:38,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:38,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-14 14:21:38,916 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 [2024-06-14 14:21:38,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 14:21:38,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 77815058, now seen corresponding path program 1 times [2024-06-14 14:21:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:38,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995082257] [2024-06-14 14:21:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:38,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:21:38,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843405271] [2024-06-14 14:21:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:38,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:38,931 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) [2024-06-14 14:21:38,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-14 14:21:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:39,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-14 14:21:39,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:39,165 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 [2024-06-14 14:21:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:39,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-14 14:21:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995082257] [2024-06-14 14:21:39,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:21:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843405271] [2024-06-14 14:21:39,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843405271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:39,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:39,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:39,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068158282] [2024-06-14 14:21:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:39,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:39,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-14 14:21:39,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2024-06-14 14:21:39,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:39,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-14 14:21:39,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:39,931 INFO L124 PetriNetUnfolderBase]: 625/1201 cut-off events. [2024-06-14 14:21:39,931 INFO L125 PetriNetUnfolderBase]: For 3141/3145 co-relation queries the response was YES. [2024-06-14 14:21:39,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4245 conditions, 1201 events. 625/1201 cut-off events. For 3141/3145 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5850 event pairs, 83 based on Foata normal form. 56/1257 useless extension candidates. Maximal degree in co-relation 2322. Up to 336 conditions per place. [2024-06-14 14:21:39,938 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 74 selfloop transitions, 19 changer transitions 7/102 dead transitions. [2024-06-14 14:21:39,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 102 transitions, 850 flow [2024-06-14 14:21:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:21:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:21:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 14:21:39,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2024-06-14 14:21:39,939 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 376 flow. Second operand 8 states and 113 transitions. [2024-06-14 14:21:39,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 102 transitions, 850 flow [2024-06-14 14:21:39,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 102 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:21:39,944 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 513 flow [2024-06-14 14:21:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-06-14 14:21:39,945 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 25 predicate places. [2024-06-14 14:21:39,945 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 513 flow [2024-06-14 14:21:39,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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) [2024-06-14 14:21:39,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:39,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:39,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-14 14:21:40,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:40,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 14:21:40,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:40,158 INFO L85 PathProgramCache]: Analyzing trace with hash 334188212, now seen corresponding path program 1 times [2024-06-14 14:21:40,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:40,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195464909] [2024-06-14 14:21:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:40,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:40,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:21:40,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097581945] [2024-06-14 14:21:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:40,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:40,173 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) [2024-06-14 14:21:40,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-14 14:21:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:40,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-14 14:21:40,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:40,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-14 14:21:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:41,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:41,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195464909] [2024-06-14 14:21:41,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:21:41,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097581945] [2024-06-14 14:21:41,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097581945] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-14 14:21:41,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-14 14:21:41,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2024-06-14 14:21:41,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130872605] [2024-06-14 14:21:41,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-14 14:21:41,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-14 14:21:41,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:41,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-14 14:21:41,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-06-14 14:21:41,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-14 14:21:41,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 513 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 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) [2024-06-14 14:21:41,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:41,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-14 14:21:41,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:42,090 INFO L124 PetriNetUnfolderBase]: 1212/2372 cut-off events. [2024-06-14 14:21:42,090 INFO L125 PetriNetUnfolderBase]: For 8139/8157 co-relation queries the response was YES. [2024-06-14 14:21:42,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8963 conditions, 2372 events. 1212/2372 cut-off events. For 8139/8157 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13047 event pairs, 172 based on Foata normal form. 96/2468 useless extension candidates. Maximal degree in co-relation 5123. Up to 619 conditions per place. [2024-06-14 14:21:42,103 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 149 selfloop transitions, 79 changer transitions 13/243 dead transitions. [2024-06-14 14:21:42,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 243 transitions, 2197 flow [2024-06-14 14:21:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-14 14:21:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-14 14:21:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 273 transitions. [2024-06-14 14:21:42,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789473684210526 [2024-06-14 14:21:42,105 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 513 flow. Second operand 19 states and 273 transitions. [2024-06-14 14:21:42,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 243 transitions, 2197 flow [2024-06-14 14:21:42,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 243 transitions, 2132 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:21:42,117 INFO L231 Difference]: Finished difference. Result has 77 places, 117 transitions, 1414 flow [2024-06-14 14:21:42,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1414, PETRI_PLACES=77, PETRI_TRANSITIONS=117} [2024-06-14 14:21:42,117 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-14 14:21:42,117 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 117 transitions, 1414 flow [2024-06-14 14:21:42,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 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) [2024-06-14 14:21:42,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:42,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:42,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-14 14:21:42,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:42,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 14:21:42,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash 220504132, now seen corresponding path program 2 times [2024-06-14 14:21:42,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:42,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314617274] [2024-06-14 14:21:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:42,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:42,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:21:42,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265614884] [2024-06-14 14:21:42,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-14 14:21:42,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:21:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:21:42,344 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) [2024-06-14 14:21:42,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-14 14:21:42,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-14 14:21:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-14 14:21:42,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-14 14:21:42,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:21:42,553 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 [2024-06-14 14:21:42,557 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 [2024-06-14 14:21:42,562 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 [2024-06-14 14:21:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:43,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-14 14:21:44,591 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 9 treesize of output 1 [2024-06-14 14:21:44,631 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 10 treesize of output 4 [2024-06-14 14:21:44,640 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-06-14 14:21:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314617274] [2024-06-14 14:21:50,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:21:50,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265614884] [2024-06-14 14:21:50,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265614884] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-14 14:21:50,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-14 14:21:50,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2024-06-14 14:21:50,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541427433] [2024-06-14 14:21:50,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-14 14:21:50,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-14 14:21:50,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:50,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-14 14:21:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=273, Unknown=1, NotChecked=0, Total=380 [2024-06-14 14:21:51,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2024-06-14 14:21:51,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 117 transitions, 1414 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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) [2024-06-14 14:21:51,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:51,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2024-06-14 14:21:51,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:22:02,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-06-14 14:22:10,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-06-14 14:22:13,663 INFO L124 PetriNetUnfolderBase]: 2984/5530 cut-off events. [2024-06-14 14:22:13,663 INFO L125 PetriNetUnfolderBase]: For 42615/42619 co-relation queries the response was YES. [2024-06-14 14:22:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24244 conditions, 5530 events. 2984/5530 cut-off events. For 42615/42619 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 34067 event pairs, 204 based on Foata normal form. 197/5727 useless extension candidates. Maximal degree in co-relation 19122. Up to 1104 conditions per place. [2024-06-14 14:22:13,708 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 350 selfloop transitions, 150 changer transitions 66/567 dead transitions. [2024-06-14 14:22:13,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 567 transitions, 6213 flow [2024-06-14 14:22:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-06-14 14:22:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-06-14 14:22:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 489 transitions. [2024-06-14 14:22:13,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704545454545455 [2024-06-14 14:22:13,711 INFO L175 Difference]: Start difference. First operand has 77 places, 117 transitions, 1414 flow. Second operand 44 states and 489 transitions. [2024-06-14 14:22:13,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 567 transitions, 6213 flow [2024-06-14 14:22:13,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 567 transitions, 5751 flow, removed 203 selfloop flow, removed 4 redundant places. [2024-06-14 14:22:13,774 INFO L231 Difference]: Finished difference. Result has 133 places, 243 transitions, 3035 flow [2024-06-14 14:22:13,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=3035, PETRI_PLACES=133, PETRI_TRANSITIONS=243} [2024-06-14 14:22:13,774 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-06-14 14:22:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 243 transitions, 3035 flow [2024-06-14 14:22:13,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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) [2024-06-14 14:22:13,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:22:13,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:22:13,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-14 14:22:13,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:22:13,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-14 14:22:13,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:22:13,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1440552836, now seen corresponding path program 3 times [2024-06-14 14:22:13,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:22:13,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560813711] [2024-06-14 14:22:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:22:13,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:22:13,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-06-14 14:22:13,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827521608] [2024-06-14 14:22:13,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-14 14:22:13,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-14 14:22:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:22:13,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-14 14:22:13,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-14 14:22:14,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-14 14:22:14,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-14 14:22:14,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-14 14:22:14,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-14 14:22:14,279 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 [2024-06-14 14:22:14,282 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 [2024-06-14 14:22:14,314 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 [2024-06-14 14:22:14,849 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 23 treesize of output 9 [2024-06-14 14:22:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:22:14,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-14 14:22:16,563 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 9 treesize of output 1 [2024-06-14 14:22:16,615 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 10 treesize of output 4 [2024-06-14 14:22:16,634 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-06-14 14:22:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:22:19,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:22:19,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560813711] [2024-06-14 14:22:19,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-06-14 14:22:19,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827521608] [2024-06-14 14:22:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827521608] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-14 14:22:19,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-06-14 14:22:19,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2024-06-14 14:22:19,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945257842] [2024-06-14 14:22:19,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-06-14 14:22:19,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-14 14:22:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:22:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-14 14:22:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-06-14 14:22:20,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2024-06-14 14:22:20,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 243 transitions, 3035 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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) [2024-06-14 14:22:20,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:22:20,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2024-06-14 14:22:20,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:22:24,945 INFO L124 PetriNetUnfolderBase]: 4906/9018 cut-off events. [2024-06-14 14:22:24,945 INFO L125 PetriNetUnfolderBase]: For 102611/102613 co-relation queries the response was YES. [2024-06-14 14:22:24,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43651 conditions, 9018 events. 4906/9018 cut-off events. For 102611/102613 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 61871 event pairs, 1004 based on Foata normal form. 444/9462 useless extension candidates. Maximal degree in co-relation 43224. Up to 2509 conditions per place. [2024-06-14 14:22:24,992 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 0 selfloop transitions, 0 changer transitions 609/609 dead transitions. [2024-06-14 14:22:24,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 609 transitions, 8010 flow [2024-06-14 14:22:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-14 14:22:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-14 14:22:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 230 transitions. [2024-06-14 14:22:24,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-14 14:22:24,994 INFO L175 Difference]: Start difference. First operand has 133 places, 243 transitions, 3035 flow. Second operand 22 states and 230 transitions. [2024-06-14 14:22:24,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 609 transitions, 8010 flow [2024-06-14 14:22:25,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 609 transitions, 6413 flow, removed 669 selfloop flow, removed 19 redundant places. [2024-06-14 14:22:25,459 INFO L231 Difference]: Finished difference. Result has 125 places, 0 transitions, 0 flow [2024-06-14 14:22:25,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1904, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=0, PETRI_PLACES=125, PETRI_TRANSITIONS=0} [2024-06-14 14:22:25,460 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-14 14:22:25,460 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 0 transitions, 0 flow [2024-06-14 14:22:25,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 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) [2024-06-14 14:22:25,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-14 14:22:25,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-14 14:22:25,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-14 14:22:25,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-14 14:22:25,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-14 14:22:25,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-06-14 14:22:25,676 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2024-06-14 14:22:25,678 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-14 14:22:25,678 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-14 14:22:25,680 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-14 14:22:25,680 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-14 14:22:25,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.06 02:22:25 BasicIcfg [2024-06-14 14:22:25,681 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-14 14:22:25,682 INFO L158 Benchmark]: Toolchain (without parser) took 51795.29ms. Allocated memory was 148.9MB in the beginning and 627.0MB in the end (delta: 478.2MB). Free memory was 96.7MB in the beginning and 436.2MB in the end (delta: -339.5MB). Peak memory consumption was 461.5MB. Max. memory is 16.1GB. [2024-06-14 14:22:25,682 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 14:22:25,682 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 100.7MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-14 14:22:25,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 502.83ms. Allocated memory is still 148.9MB. Free memory was 96.7MB in the beginning and 69.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-14 14:22:25,682 INFO L158 Benchmark]: Boogie Procedure Inliner took 103.59ms. Allocated memory is still 148.9MB. Free memory was 69.5MB in the beginning and 115.9MB in the end (delta: -46.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-14 14:22:25,683 INFO L158 Benchmark]: Boogie Preprocessor took 56.81ms. Allocated memory is still 148.9MB. Free memory was 115.9MB in the beginning and 112.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-14 14:22:25,683 INFO L158 Benchmark]: RCFGBuilder took 823.08ms. Allocated memory is still 148.9MB. Free memory was 112.9MB in the beginning and 55.1MB in the end (delta: 57.8MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2024-06-14 14:22:25,683 INFO L158 Benchmark]: TraceAbstraction took 50302.52ms. Allocated memory was 148.9MB in the beginning and 627.0MB in the end (delta: 478.2MB). Free memory was 54.2MB in the beginning and 436.2MB in the end (delta: -382.0MB). Peak memory consumption was 422.0MB. Max. memory is 16.1GB. [2024-06-14 14:22:25,684 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 100.7MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 502.83ms. Allocated memory is still 148.9MB. Free memory was 96.7MB in the beginning and 69.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 103.59ms. Allocated memory is still 148.9MB. Free memory was 69.5MB in the beginning and 115.9MB in the end (delta: -46.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.81ms. Allocated memory is still 148.9MB. Free memory was 115.9MB in the beginning and 112.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 823.08ms. Allocated memory is still 148.9MB. Free memory was 112.9MB in the beginning and 55.1MB in the end (delta: 57.8MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. * TraceAbstraction took 50302.52ms. Allocated memory was 148.9MB in the beginning and 627.0MB in the end (delta: 478.2MB). Free memory was 54.2MB in the beginning and 436.2MB in the end (delta: -382.0MB). Peak memory consumption was 422.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 764]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 765]: 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: 50.2s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1306 SdHoareTripleChecker+Valid, 13.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1282 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 13.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26 mSDsCounter, 206 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3091 IncrementalHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 206 mSolverCounterUnsat, 1 mSDtfsCounter, 3091 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 267 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 21.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3035occurred in iteration=8, InterpolantAutomatonStates: 115, 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, 16.5s InterpolantComputationTime, 172 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 213 ConstructedInterpolants, 61 QuantifiedInterpolants, 9152 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1363 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 2/22 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! [2024-06-14 14:22:25,819 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