./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_bad.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_bad.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:43:25,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:43:25,685 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:43:25,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:43:25,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:43:25,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:43:25,721 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:43:25,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:43:25,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:43:25,725 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:43:25,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:43:25,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:43:25,727 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:43:25,728 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:43:25,728 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:43:25,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:43:25,729 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:43:25,729 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:43:25,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:43:25,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:43:25,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:43:25,730 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:43:25,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:43:25,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:43:25,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:43:25,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:43:25,732 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:43:25,732 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:43:25,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:43:25,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:43:25,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:43:25,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:43:25,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:43:25,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:43:25,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:43:25,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:43:25,735 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:43:25,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:43:25,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:43:25,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:43:25,735 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:43:25,736 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:43:25,736 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:43:25,736 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:43:26,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:43:26,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:43:26,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:43:26,043 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:43:26,043 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:43:26,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_bad.yml/witness.yml [2024-01-31 17:43:26,208 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:43:26,208 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:43:26,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-01-31 17:43:27,236 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:43:27,459 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:43:27,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2024-01-31 17:43:27,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6cc3576/41867444448244f29efbdabefd348bd9/FLAG0c662a858 [2024-01-31 17:43:27,488 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea6cc3576/41867444448244f29efbdabefd348bd9 [2024-01-31 17:43:27,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:43:27,490 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:43:27,494 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:43:27,494 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:43:27,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:43:27,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:43:26" (1/2) ... [2024-01-31 17:43:27,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240f9ffa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:43:27, skipping insertion in model container [2024-01-31 17:43:27,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:43:26" (1/2) ... [2024-01-31 17:43:27,503 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c258416 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:43:27, skipping insertion in model container [2024-01-31 17:43:27,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:43:27" (2/2) ... [2024-01-31 17:43:27,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240f9ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:27, skipping insertion in model container [2024-01-31 17:43:27,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:43:27" (2/2) ... [2024-01-31 17:43:27,504 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:43:27,660 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:43:27,661 INFO L98 nessWitnessExtractor]: Location invariant before [L746-L746] (((receive == (_Bool)1) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) || i == 4) [2024-01-31 17:43:27,702 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:43:27,964 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-01-31 17:43:27,976 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] [2024-01-31 17:43:27,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:43:27,997 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:43:28,031 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30440,30453] [2024-01-31 17:43:28,037 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i[30895,30908] Start Parsing Local [2024-01-31 17:43:28,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:43:28,098 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:43:28,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28 WrapperNode [2024-01-31 17:43:28,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:43:28,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:43:28,100 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:43:28,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:43:28,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,158 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2024-01-31 17:43:28,161 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:43:28,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:43:28,162 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:43:28,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:43:28,170 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,174 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,185 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 3, 8, 2, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 8, 0, 0]. The 4 writes are split as follows [0, 0, 2, 0, 1, 1]. [2024-01-31 17:43:28,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,195 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,196 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:43:28,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:43:28,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:43:28,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:43:28,200 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (1/1) ... [2024-01-31 17:43:28,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:43:28,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:28,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 17:43:28,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 17:43:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:43:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:43:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:43:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:43:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:43:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-31 17:43:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 17:43:28,264 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 17:43:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 17:43:28,264 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 17:43:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:43:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:43:28,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:43:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:43:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:43:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:43:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-31 17:43:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 17:43:28,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:43:28,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:43:28,268 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:43:28,384 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:43:28,386 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:43:28,644 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:43:28,644 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:43:28,815 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:43:28,815 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:43:28,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:43:28 BoogieIcfgContainer [2024-01-31 17:43:28,816 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:43:28,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:43:28,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:43:28,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:43:28,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:43:26" (1/4) ... [2024-01-31 17:43:28,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e5b42c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:43:28, skipping insertion in model container [2024-01-31 17:43:28,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:43:27" (2/4) ... [2024-01-31 17:43:28,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e5b42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:43:28, skipping insertion in model container [2024-01-31 17:43:28,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:43:28" (3/4) ... [2024-01-31 17:43:28,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e5b42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:43:28, skipping insertion in model container [2024-01-31 17:43:28,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:43:28" (4/4) ... [2024-01-31 17:43:28,822 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2024-01-31 17:43:28,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:43:28,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-01-31 17:43:28,856 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:43:28,904 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:43:28,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 44 transitions, 102 flow [2024-01-31 17:43:28,971 INFO L124 PetriNetUnfolderBase]: 7/42 cut-off events. [2024-01-31 17:43:28,971 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:43:28,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 7/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-01-31 17:43:28,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 44 transitions, 102 flow [2024-01-31 17:43:28,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 40 transitions, 89 flow [2024-01-31 17:43:28,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:43:29,001 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;@76f3549e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:43:29,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-01-31 17:43:29,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:43:29,015 INFO L124 PetriNetUnfolderBase]: 6/35 cut-off events. [2024-01-31 17:43:29,015 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 17:43:29,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:29,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:29,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:29,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2077914384, now seen corresponding path program 1 times [2024-01-31 17:43:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48131300] [2024-01-31 17:43:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:29,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:29,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533559043] [2024-01-31 17:43:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:29,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:29,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:29,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:43:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:29,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:43:29,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:29,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:43:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48131300] [2024-01-31 17:43:29,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533559043] [2024-01-31 17:43:29,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533559043] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:29,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:29,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:43:29,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379894615] [2024-01-31 17:43:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:43:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:43:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:43:29,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:29,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:29,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:29,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:29,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:29,891 INFO L124 PetriNetUnfolderBase]: 318/607 cut-off events. [2024-01-31 17:43:29,892 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-31 17:43:29,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 607 events. 318/607 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3021 event pairs, 225 based on Foata normal form. 40/560 useless extension candidates. Maximal degree in co-relation 1032. Up to 495 conditions per place. [2024-01-31 17:43:29,938 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 24 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2024-01-31 17:43:29,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 131 flow [2024-01-31 17:43:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:43:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:43:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-01-31 17:43:29,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-01-31 17:43:29,951 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 89 flow. Second operand 3 states and 69 transitions. [2024-01-31 17:43:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 131 flow [2024-01-31 17:43:29,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:43:29,969 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 78 flow [2024-01-31 17:43:29,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-01-31 17:43:29,974 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2024-01-31 17:43:29,974 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 78 flow [2024-01-31 17:43:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:29,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:29,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:30,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:30,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-01-31 17:43:30,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:30,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:30,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1838098132, now seen corresponding path program 1 times [2024-01-31 17:43:30,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:30,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291473604] [2024-01-31 17:43:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:30,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:30,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291473604] [2024-01-31 17:43:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291473604] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:30,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:30,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:43:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363326164] [2024-01-31 17:43:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:30,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:43:30,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:43:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:43:30,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:30,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:30,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:30,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:30,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:30,541 INFO L124 PetriNetUnfolderBase]: 524/970 cut-off events. [2024-01-31 17:43:30,541 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-31 17:43:30,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 970 events. 524/970 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4391 event pairs, 186 based on Foata normal form. 14/909 useless extension candidates. Maximal degree in co-relation 1803. Up to 487 conditions per place. [2024-01-31 17:43:30,547 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 38 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2024-01-31 17:43:30,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 54 transitions, 205 flow [2024-01-31 17:43:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:43:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:43:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-01-31 17:43:30,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-01-31 17:43:30,551 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 78 flow. Second operand 3 states and 87 transitions. [2024-01-31 17:43:30,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 54 transitions, 205 flow [2024-01-31 17:43:30,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:43:30,554 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 92 flow [2024-01-31 17:43:30,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-01-31 17:43:30,555 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-01-31 17:43:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 92 flow [2024-01-31 17:43:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:30,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:30,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:43:30,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:30,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1357216731, now seen corresponding path program 1 times [2024-01-31 17:43:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861798198] [2024-01-31 17:43:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861798198] [2024-01-31 17:43:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861798198] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:30,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:30,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:43:30,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338715152] [2024-01-31 17:43:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:43:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:43:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:43:30,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-01-31 17:43:30,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:30,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:30,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-01-31 17:43:30,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:30,859 INFO L124 PetriNetUnfolderBase]: 319/665 cut-off events. [2024-01-31 17:43:30,860 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-01-31 17:43:30,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258 conditions, 665 events. 319/665 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2997 event pairs, 87 based on Foata normal form. 28/651 useless extension candidates. Maximal degree in co-relation 1250. Up to 306 conditions per place. [2024-01-31 17:43:30,863 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 32 selfloop transitions, 4 changer transitions 1/48 dead transitions. [2024-01-31 17:43:30,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 191 flow [2024-01-31 17:43:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:43:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:43:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-31 17:43:30,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-01-31 17:43:30,867 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 92 flow. Second operand 3 states and 83 transitions. [2024-01-31 17:43:30,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 191 flow [2024-01-31 17:43:30,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:43:30,869 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 97 flow [2024-01-31 17:43:30,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-01-31 17:43:30,870 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-01-31 17:43:30,870 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 97 flow [2024-01-31 17:43:30,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:30,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:30,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:30,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:43:30,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:30,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1835149164, now seen corresponding path program 1 times [2024-01-31 17:43:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:30,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319679423] [2024-01-31 17:43:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:30,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319679423] [2024-01-31 17:43:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319679423] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:43:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369278573] [2024-01-31 17:43:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:43:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:43:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:43:31,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-01-31 17:43:31,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:31,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:31,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-01-31 17:43:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:31,460 INFO L124 PetriNetUnfolderBase]: 338/709 cut-off events. [2024-01-31 17:43:31,460 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-01-31 17:43:31,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 709 events. 338/709 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3363 event pairs, 135 based on Foata normal form. 50/720 useless extension candidates. Maximal degree in co-relation 1441. Up to 263 conditions per place. [2024-01-31 17:43:31,463 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 52 selfloop transitions, 5 changer transitions 3/69 dead transitions. [2024-01-31 17:43:31,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 304 flow [2024-01-31 17:43:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:43:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:43:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-01-31 17:43:31,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-01-31 17:43:31,465 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 97 flow. Second operand 5 states and 132 transitions. [2024-01-31 17:43:31,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 304 flow [2024-01-31 17:43:31,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:43:31,468 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 130 flow [2024-01-31 17:43:31,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-01-31 17:43:31,470 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2024-01-31 17:43:31,470 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 130 flow [2024-01-31 17:43:31,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:31,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:31,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:31,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:43:31,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:31,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:31,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1717846698, now seen corresponding path program 2 times [2024-01-31 17:43:31,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:31,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39722093] [2024-01-31 17:43:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:31,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:31,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:31,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39722093] [2024-01-31 17:43:31,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39722093] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:31,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:31,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:43:31,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082548555] [2024-01-31 17:43:31,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:31,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:43:31,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:43:31,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:43:31,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-01-31 17:43:31,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:31,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:31,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-01-31 17:43:31,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:31,987 INFO L124 PetriNetUnfolderBase]: 528/1157 cut-off events. [2024-01-31 17:43:31,987 INFO L125 PetriNetUnfolderBase]: For 423/425 co-relation queries the response was YES. [2024-01-31 17:43:31,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2506 conditions, 1157 events. 528/1157 cut-off events. For 423/425 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6367 event pairs, 173 based on Foata normal form. 50/1150 useless extension candidates. Maximal degree in co-relation 2495. Up to 437 conditions per place. [2024-01-31 17:43:31,993 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 65 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2024-01-31 17:43:31,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 411 flow [2024-01-31 17:43:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:43:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:43:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-01-31 17:43:31,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-01-31 17:43:31,995 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 130 flow. Second operand 5 states and 138 transitions. [2024-01-31 17:43:31,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 411 flow [2024-01-31 17:43:31,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 82 transitions, 404 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:43:31,998 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 177 flow [2024-01-31 17:43:31,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-01-31 17:43:31,998 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-01-31 17:43:31,998 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 177 flow [2024-01-31 17:43:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:31,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:31,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:43:31,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:32,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash -547982584, now seen corresponding path program 3 times [2024-01-31 17:43:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:32,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346174671] [2024-01-31 17:43:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:32,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346174671] [2024-01-31 17:43:32,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346174671] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:32,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:32,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:43:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097625606] [2024-01-31 17:43:32,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:32,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:43:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:32,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:43:32,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:43:32,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-01-31 17:43:32,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:32,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:32,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-01-31 17:43:32,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:32,370 INFO L124 PetriNetUnfolderBase]: 519/1150 cut-off events. [2024-01-31 17:43:32,371 INFO L125 PetriNetUnfolderBase]: For 788/790 co-relation queries the response was YES. [2024-01-31 17:43:32,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 1150 events. 519/1150 cut-off events. For 788/790 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6373 event pairs, 183 based on Foata normal form. 8/1107 useless extension candidates. Maximal degree in co-relation 2694. Up to 491 conditions per place. [2024-01-31 17:43:32,376 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 61 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2024-01-31 17:43:32,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 428 flow [2024-01-31 17:43:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:43:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:43:32,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-01-31 17:43:32,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-01-31 17:43:32,377 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 177 flow. Second operand 5 states and 129 transitions. [2024-01-31 17:43:32,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 428 flow [2024-01-31 17:43:32,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:43:32,381 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 232 flow [2024-01-31 17:43:32,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-01-31 17:43:32,381 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-01-31 17:43:32,382 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 232 flow [2024-01-31 17:43:32,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:32,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:32,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:32,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:43:32,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:32,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1268120656, now seen corresponding path program 1 times [2024-01-31 17:43:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:32,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796200002] [2024-01-31 17:43:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:32,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:32,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796200002] [2024-01-31 17:43:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796200002] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:32,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:32,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:43:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656509342] [2024-01-31 17:43:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:32,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:43:32,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:43:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:43:32,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:32,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:32,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:32,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:32,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:32,596 INFO L124 PetriNetUnfolderBase]: 573/1280 cut-off events. [2024-01-31 17:43:32,596 INFO L125 PetriNetUnfolderBase]: For 1369/1371 co-relation queries the response was YES. [2024-01-31 17:43:32,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 1280 events. 573/1280 cut-off events. For 1369/1371 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7177 event pairs, 308 based on Foata normal form. 0/1222 useless extension candidates. Maximal degree in co-relation 3142. Up to 733 conditions per place. [2024-01-31 17:43:32,603 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 46 selfloop transitions, 2 changer transitions 4/63 dead transitions. [2024-01-31 17:43:32,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 407 flow [2024-01-31 17:43:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:43:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:43:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-01-31 17:43:32,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-01-31 17:43:32,604 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 232 flow. Second operand 3 states and 84 transitions. [2024-01-31 17:43:32,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 407 flow [2024-01-31 17:43:32,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 400 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 17:43:32,608 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 238 flow [2024-01-31 17:43:32,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-01-31 17:43:32,609 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2024-01-31 17:43:32,609 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 238 flow [2024-01-31 17:43:32,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:32,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:32,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:32,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:43:32,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:32,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:32,610 INFO L85 PathProgramCache]: Analyzing trace with hash -456408789, now seen corresponding path program 1 times [2024-01-31 17:43:32,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:32,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776905240] [2024-01-31 17:43:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:32,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:32,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:32,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30564564] [2024-01-31 17:43:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:32,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:32,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:32,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:43:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:32,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:43:32,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:32,839 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 7 treesize of output 6 [2024-01-31 17:43:32,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-31 17:43:33,061 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 17 treesize of output 13 [2024-01-31 17:43:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:33,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:43:33,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:33,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776905240] [2024-01-31 17:43:33,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:33,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30564564] [2024-01-31 17:43:33,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30564564] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:33,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:33,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:43:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827787811] [2024-01-31 17:43:33,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:43:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:43:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:43:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 238 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:33,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:33,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:33,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:33,415 INFO L124 PetriNetUnfolderBase]: 700/1546 cut-off events. [2024-01-31 17:43:33,416 INFO L125 PetriNetUnfolderBase]: For 1539/1541 co-relation queries the response was YES. [2024-01-31 17:43:33,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 1546 events. 700/1546 cut-off events. For 1539/1541 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9158 event pairs, 302 based on Foata normal form. 18/1506 useless extension candidates. Maximal degree in co-relation 3863. Up to 755 conditions per place. [2024-01-31 17:43:33,422 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 69 selfloop transitions, 10 changer transitions 12/102 dead transitions. [2024-01-31 17:43:33,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 650 flow [2024-01-31 17:43:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:43:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:43:33,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-01-31 17:43:33,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-01-31 17:43:33,424 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 238 flow. Second operand 8 states and 192 transitions. [2024-01-31 17:43:33,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 650 flow [2024-01-31 17:43:33,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 646 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:43:33,428 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 313 flow [2024-01-31 17:43:33,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-01-31 17:43:33,429 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2024-01-31 17:43:33,429 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 313 flow [2024-01-31 17:43:33,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:33,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:33,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:33,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:33,644 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,SelfDestructingSolverStorable7 [2024-01-31 17:43:33,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:33,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash -763158189, now seen corresponding path program 2 times [2024-01-31 17:43:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:33,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508945603] [2024-01-31 17:43:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:33,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:33,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175209409] [2024-01-31 17:43:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:43:33,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:33,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:33,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:43:33,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 17:43:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:43:33,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:43:33,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:33,885 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 7 treesize of output 6 [2024-01-31 17:43:34,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-31 17:43:34,084 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 17 treesize of output 13 [2024-01-31 17:43:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:34,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:43:34,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:34,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508945603] [2024-01-31 17:43:34,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:34,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175209409] [2024-01-31 17:43:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175209409] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:34,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:34,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:43:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840970963] [2024-01-31 17:43:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:43:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:43:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:43:34,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:34,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:34,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:34,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:34,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:34,444 INFO L124 PetriNetUnfolderBase]: 780/1748 cut-off events. [2024-01-31 17:43:34,444 INFO L125 PetriNetUnfolderBase]: For 2417/2423 co-relation queries the response was YES. [2024-01-31 17:43:34,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 1748 events. 780/1748 cut-off events. For 2417/2423 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 10840 event pairs, 324 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 4835. Up to 831 conditions per place. [2024-01-31 17:43:34,452 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 19 changer transitions 10/114 dead transitions. [2024-01-31 17:43:34,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 789 flow [2024-01-31 17:43:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:43:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:43:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-01-31 17:43:34,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539772727272727 [2024-01-31 17:43:34,453 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 313 flow. Second operand 8 states and 195 transitions. [2024-01-31 17:43:34,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 789 flow [2024-01-31 17:43:34,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 771 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 17:43:34,461 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 465 flow [2024-01-31 17:43:34,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=465, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-01-31 17:43:34,461 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 38 predicate places. [2024-01-31 17:43:34,462 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 465 flow [2024-01-31 17:43:34,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:34,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:34,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:34,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:34,674 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:34,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1306848689, now seen corresponding path program 3 times [2024-01-31 17:43:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130547609] [2024-01-31 17:43:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:34,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:34,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052215281] [2024-01-31 17:43:34,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:43:34,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:34,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:34,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:34,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:43:34,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 17:43:34,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:43:34,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:43:34,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:34,888 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 7 treesize of output 6 [2024-01-31 17:43:35,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-31 17:43:35,102 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 17 treesize of output 13 [2024-01-31 17:43:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:35,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:43:35,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130547609] [2024-01-31 17:43:35,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:35,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052215281] [2024-01-31 17:43:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052215281] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:35,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:43:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416099121] [2024-01-31 17:43:35,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:35,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:43:35,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:43:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:43:35,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:35,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 465 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:35,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:35,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:35,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:35,538 INFO L124 PetriNetUnfolderBase]: 832/1875 cut-off events. [2024-01-31 17:43:35,538 INFO L125 PetriNetUnfolderBase]: For 3451/3471 co-relation queries the response was YES. [2024-01-31 17:43:35,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5592 conditions, 1875 events. 832/1875 cut-off events. For 3451/3471 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11869 event pairs, 324 based on Foata normal form. 0/1823 useless extension candidates. Maximal degree in co-relation 5564. Up to 923 conditions per place. [2024-01-31 17:43:35,550 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 21 changer transitions 8/120 dead transitions. [2024-01-31 17:43:35,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 930 flow [2024-01-31 17:43:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:43:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:43:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-01-31 17:43:35,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-01-31 17:43:35,552 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 465 flow. Second operand 8 states and 196 transitions. [2024-01-31 17:43:35,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 930 flow [2024-01-31 17:43:35,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 920 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-01-31 17:43:35,566 INFO L231 Difference]: Finished difference. Result has 89 places, 77 transitions, 617 flow [2024-01-31 17:43:35,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=617, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2024-01-31 17:43:35,567 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-01-31 17:43:35,567 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 617 flow [2024-01-31 17:43:35,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:35,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:35,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:35,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:35,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:35,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:35,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash 798938075, now seen corresponding path program 4 times [2024-01-31 17:43:35,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:35,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725454983] [2024-01-31 17:43:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:35,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:35,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386398451] [2024-01-31 17:43:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:43:35,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:35,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:35,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:35,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:43:35,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:43:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:43:35,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:43:35,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:35,942 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 7 treesize of output 6 [2024-01-31 17:43:36,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-31 17:43:36,112 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 17 treesize of output 13 [2024-01-31 17:43:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:36,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:43:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:36,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725454983] [2024-01-31 17:43:36,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:36,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386398451] [2024-01-31 17:43:36,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386398451] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:36,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:36,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:43:36,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700353692] [2024-01-31 17:43:36,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:36,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:43:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:43:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:43:36,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:36,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:36,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:36,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:36,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:36,503 INFO L124 PetriNetUnfolderBase]: 1034/2353 cut-off events. [2024-01-31 17:43:36,503 INFO L125 PetriNetUnfolderBase]: For 5271/5303 co-relation queries the response was YES. [2024-01-31 17:43:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7287 conditions, 2353 events. 1034/2353 cut-off events. For 5271/5303 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 15577 event pairs, 263 based on Foata normal form. 4/2303 useless extension candidates. Maximal degree in co-relation 7253. Up to 840 conditions per place. [2024-01-31 17:43:36,516 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 94 selfloop transitions, 24 changer transitions 12/141 dead transitions. [2024-01-31 17:43:36,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 141 transitions, 1201 flow [2024-01-31 17:43:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:43:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:43:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-01-31 17:43:36,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-01-31 17:43:36,518 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 617 flow. Second operand 8 states and 204 transitions. [2024-01-31 17:43:36,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 141 transitions, 1201 flow [2024-01-31 17:43:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1166 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-01-31 17:43:36,564 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 714 flow [2024-01-31 17:43:36,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=714, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2024-01-31 17:43:36,564 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2024-01-31 17:43:36,565 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 714 flow [2024-01-31 17:43:36,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:36,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:36,565 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, 1, 1, 1, 1] [2024-01-31 17:43:36,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:36,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 17:43:36,777 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:36,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:36,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1606496125, now seen corresponding path program 1 times [2024-01-31 17:43:36,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:36,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414144043] [2024-01-31 17:43:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:36,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:36,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970949263] [2024-01-31 17:43:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:36,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:36,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:36,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:43:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:36,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 17:43:36,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:37,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:43:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:38,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:38,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414144043] [2024-01-31 17:43:38,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:38,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970949263] [2024-01-31 17:43:38,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970949263] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:43:38,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:43:38,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2024-01-31 17:43:38,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488172885] [2024-01-31 17:43:38,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:43:38,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:43:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:43:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:43:38,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-01-31 17:43:38,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 714 flow. Second operand has 16 states, 16 states have (on average 13.5) internal successors, (216), 16 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:38,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:38,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-01-31 17:43:38,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:39,847 INFO L124 PetriNetUnfolderBase]: 2468/5329 cut-off events. [2024-01-31 17:43:39,847 INFO L125 PetriNetUnfolderBase]: For 13012/13028 co-relation queries the response was YES. [2024-01-31 17:43:39,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16581 conditions, 5329 events. 2468/5329 cut-off events. For 13012/13028 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 37764 event pairs, 447 based on Foata normal form. 216/5439 useless extension candidates. Maximal degree in co-relation 16545. Up to 871 conditions per place. [2024-01-31 17:43:39,883 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 238 selfloop transitions, 99 changer transitions 47/391 dead transitions. [2024-01-31 17:43:39,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 391 transitions, 3150 flow [2024-01-31 17:43:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:43:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:43:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 654 transitions. [2024-01-31 17:43:39,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512539184952978 [2024-01-31 17:43:39,886 INFO L175 Difference]: Start difference. First operand has 96 places, 83 transitions, 714 flow. Second operand 29 states and 654 transitions. [2024-01-31 17:43:39,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 391 transitions, 3150 flow [2024-01-31 17:43:39,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 391 transitions, 3063 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-01-31 17:43:39,933 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1633 flow [2024-01-31 17:43:39,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1633, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-01-31 17:43:39,934 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 101 predicate places. [2024-01-31 17:43:39,935 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1633 flow [2024-01-31 17:43:39,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5) internal successors, (216), 16 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:39,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:39,935 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, 1, 1, 1, 1] [2024-01-31 17:43:39,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:40,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:40,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1207840827, now seen corresponding path program 2 times [2024-01-31 17:43:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:40,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359444711] [2024-01-31 17:43:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:40,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:40,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185444331] [2024-01-31 17:43:40,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:43:40,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:40,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:40,165 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) [2024-01-31 17:43:40,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:43:40,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:43:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:43:40,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:43:40,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:40,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:43:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:41,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359444711] [2024-01-31 17:43:41,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:41,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185444331] [2024-01-31 17:43:41,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185444331] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:43:41,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:43:41,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2024-01-31 17:43:41,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046859104] [2024-01-31 17:43:41,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:43:41,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:43:41,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:41,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:43:41,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:43:41,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-01-31 17:43:41,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1633 flow. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:41,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:41,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-01-31 17:43:41,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:42,619 INFO L124 PetriNetUnfolderBase]: 3332/7272 cut-off events. [2024-01-31 17:43:42,619 INFO L125 PetriNetUnfolderBase]: For 51759/51825 co-relation queries the response was YES. [2024-01-31 17:43:42,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27179 conditions, 7272 events. 3332/7272 cut-off events. For 51759/51825 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 54932 event pairs, 823 based on Foata normal form. 154/7268 useless extension candidates. Maximal degree in co-relation 27122. Up to 1268 conditions per place. [2024-01-31 17:43:42,667 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 207 selfloop transitions, 101 changer transitions 25/343 dead transitions. [2024-01-31 17:43:42,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 343 transitions, 3629 flow [2024-01-31 17:43:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:43:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:43:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 409 transitions. [2024-01-31 17:43:42,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467914438502673 [2024-01-31 17:43:42,669 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1633 flow. Second operand 17 states and 409 transitions. [2024-01-31 17:43:42,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 343 transitions, 3629 flow [2024-01-31 17:43:42,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 343 transitions, 3453 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-01-31 17:43:42,875 INFO L231 Difference]: Finished difference. Result has 161 places, 185 transitions, 2270 flow [2024-01-31 17:43:42,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2270, PETRI_PLACES=161, PETRI_TRANSITIONS=185} [2024-01-31 17:43:42,876 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-01-31 17:43:42,876 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 185 transitions, 2270 flow [2024-01-31 17:43:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:42,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:42,876 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, 1, 1, 1, 1] [2024-01-31 17:43:42,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:43,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:43,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash 24140913, now seen corresponding path program 3 times [2024-01-31 17:43:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992900760] [2024-01-31 17:43:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:43,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:43,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:43,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850688235] [2024-01-31 17:43:43,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:43:43,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:43,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:43,111 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) [2024-01-31 17:43:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:43:43,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:43:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:43:43,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:43:43,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:43,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:43:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:44,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:44,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992900760] [2024-01-31 17:43:44,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:43:44,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850688235] [2024-01-31 17:43:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850688235] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:43:44,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:43:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2024-01-31 17:43:44,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876095740] [2024-01-31 17:43:44,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:43:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:43:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:43:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:43:44,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-01-31 17:43:44,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 185 transitions, 2270 flow. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:44,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:44,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-01-31 17:43:44,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:45,739 INFO L124 PetriNetUnfolderBase]: 3519/7707 cut-off events. [2024-01-31 17:43:45,740 INFO L125 PetriNetUnfolderBase]: For 86264/86326 co-relation queries the response was YES. [2024-01-31 17:43:45,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30111 conditions, 7707 events. 3519/7707 cut-off events. For 86264/86326 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 58564 event pairs, 747 based on Foata normal form. 228/7771 useless extension candidates. Maximal degree in co-relation 30046. Up to 1157 conditions per place. [2024-01-31 17:43:45,789 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 255 selfloop transitions, 107 changer transitions 31/403 dead transitions. [2024-01-31 17:43:45,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 403 transitions, 4460 flow [2024-01-31 17:43:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:43:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:43:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 490 transitions. [2024-01-31 17:43:45,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861244019138756 [2024-01-31 17:43:45,791 INFO L175 Difference]: Start difference. First operand has 161 places, 185 transitions, 2270 flow. Second operand 19 states and 490 transitions. [2024-01-31 17:43:45,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 403 transitions, 4460 flow [2024-01-31 17:43:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 403 transitions, 4315 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-01-31 17:43:46,091 INFO L231 Difference]: Finished difference. Result has 181 places, 194 transitions, 2592 flow [2024-01-31 17:43:46,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2592, PETRI_PLACES=181, PETRI_TRANSITIONS=194} [2024-01-31 17:43:46,091 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 141 predicate places. [2024-01-31 17:43:46,092 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 194 transitions, 2592 flow [2024-01-31 17:43:46,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:46,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:46,092 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, 1, 1, 1, 1] [2024-01-31 17:43:46,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:46,304 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,SelfDestructingSolverStorable13 [2024-01-31 17:43:46,305 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:46,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1883438983, now seen corresponding path program 1 times [2024-01-31 17:43:46,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:46,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273595584] [2024-01-31 17:43:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:43:46,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273595584] [2024-01-31 17:43:46,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2024-01-31 17:43:46,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235768583] [2024-01-31 17:43:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:46,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:46,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:46,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:43:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:43:46,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2024-01-31 17:43:46,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:43:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:43:46,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:43:46,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235768583] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:43:46,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:43:46,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:43:46,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950127357] [2024-01-31 17:43:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:43:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:43:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:43:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:43:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:43:46,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-01-31 17:43:46,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 194 transitions, 2592 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:46,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:43:46,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-01-31 17:43:46,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:43:47,501 INFO L124 PetriNetUnfolderBase]: 3454/7602 cut-off events. [2024-01-31 17:43:47,501 INFO L125 PetriNetUnfolderBase]: For 81257/81287 co-relation queries the response was YES. [2024-01-31 17:43:47,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 7602 events. 3454/7602 cut-off events. For 81257/81287 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 58319 event pairs, 1249 based on Foata normal form. 69/7524 useless extension candidates. Maximal degree in co-relation 30412. Up to 4591 conditions per place. [2024-01-31 17:43:47,546 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 112 selfloop transitions, 51 changer transitions 31/217 dead transitions. [2024-01-31 17:43:47,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 217 transitions, 3205 flow [2024-01-31 17:43:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:43:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:43:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-31 17:43:47,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-01-31 17:43:47,547 INFO L175 Difference]: Start difference. First operand has 181 places, 194 transitions, 2592 flow. Second operand 3 states and 83 transitions. [2024-01-31 17:43:47,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 217 transitions, 3205 flow [2024-01-31 17:43:47,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 217 transitions, 2952 flow, removed 32 selfloop flow, removed 13 redundant places. [2024-01-31 17:43:47,944 INFO L231 Difference]: Finished difference. Result has 172 places, 180 transitions, 2423 flow [2024-01-31 17:43:47,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2423, PETRI_PLACES=172, PETRI_TRANSITIONS=180} [2024-01-31 17:43:47,945 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2024-01-31 17:43:47,945 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 180 transitions, 2423 flow [2024-01-31 17:43:47,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:43:47,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:43:47,945 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, 1, 1, 1, 1, 1] [2024-01-31 17:43:47,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:43:48,157 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-31 17:43:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:43:48,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1738227257, now seen corresponding path program 1 times [2024-01-31 17:43:48,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:43:48,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294042438] [2024-01-31 17:43:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:48,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:43:48,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:43:48,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414529098] [2024-01-31 17:43:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:43:48,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:43:48,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:43:48,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:43:48,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:43:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:43:48,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-31 17:43:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-31 17:43:48,547 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-31 17:43:48,547 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-31 17:43:48,548 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 8 remaining) [2024-01-31 17:43:48,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 8 remaining) [2024-01-31 17:43:48,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-01-31 17:43:48,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-01-31 17:43:48,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 8 remaining) [2024-01-31 17:43:48,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-01-31 17:43:48,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-01-31 17:43:48,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 8 remaining) [2024-01-31 17:43:48,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:43:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:43:48,752 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1, 1] [2024-01-31 17:43:48,757 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-31 17:43:48,757 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-31 17:43:48,802 INFO L503 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-01-31 17:43:48,802 INFO L504 ceAbstractionStarter]: WitnessConsidered=1 [2024-01-31 17:43:48,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 05:43:48 BasicIcfg [2024-01-31 17:43:48,803 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-31 17:43:48,803 INFO L158 Benchmark]: Toolchain (without parser) took 21313.56ms. Allocated memory was 151.0MB in the beginning and 1.1GB in the end (delta: 918.6MB). Free memory was 122.5MB in the beginning and 688.9MB in the end (delta: -566.4MB). Peak memory consumption was 352.0MB. Max. memory is 16.1GB. [2024-01-31 17:43:48,804 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 104.9MB. Free memory was 76.2MB in the beginning and 76.1MB in the end (delta: 120.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 17:43:48,804 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 151.0MB. Free memory is still 121.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 17:43:48,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 605.05ms. Allocated memory is still 151.0MB. Free memory was 121.8MB in the beginning and 84.0MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-01-31 17:43:48,804 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.69ms. Allocated memory is still 151.0MB. Free memory was 84.0MB in the beginning and 82.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 17:43:48,804 INFO L158 Benchmark]: Boogie Preprocessor took 37.11ms. Allocated memory is still 151.0MB. Free memory was 82.0MB in the beginning and 78.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 17:43:48,805 INFO L158 Benchmark]: RCFGBuilder took 616.84ms. Allocated memory is still 151.0MB. Free memory was 78.8MB in the beginning and 92.1MB in the end (delta: -13.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-31 17:43:48,805 INFO L158 Benchmark]: TraceAbstraction took 19985.95ms. Allocated memory was 151.0MB in the beginning and 1.1GB in the end (delta: 918.6MB). Free memory was 91.2MB in the beginning and 688.9MB in the end (delta: -597.7MB). Peak memory consumption was 320.5MB. Max. memory is 16.1GB. [2024-01-31 17:43:48,806 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 0.18ms. Allocated memory is still 104.9MB. Free memory was 76.2MB in the beginning and 76.1MB in the end (delta: 120.4kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 151.0MB. Free memory is still 121.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 605.05ms. Allocated memory is still 151.0MB. Free memory was 121.8MB in the beginning and 84.0MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.69ms. Allocated memory is still 151.0MB. Free memory was 84.0MB in the beginning and 82.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.11ms. Allocated memory is still 151.0MB. Free memory was 82.0MB in the beginning and 78.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 616.84ms. Allocated memory is still 151.0MB. Free memory was 78.8MB in the beginning and 92.1MB in the end (delta: -13.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 19985.95ms. Allocated memory was 151.0MB in the beginning and 1.1GB in the end (delta: 918.6MB). Free memory was 91.2MB in the beginning and 688.9MB in the end (delta: -597.7MB). Peak memory consumption was 320.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 746]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 static char buffer[10]; [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L743] COND FALSE 2 !(\read(receive)) VAL [buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b [L710] 1 next = (next+1)%buffer_size VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=1, receive=0, send=1] [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] 2 CodeAnnotStmt[Assertion[BinaryExpression[LOGICAND,BinaryExpression[LOGICAND,BinaryExpression[LOGICAND,BinaryExpression[COMPEQ,IdentifierExpression[receive],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]],BinaryExpression[COMPEQ,CastExpression[ACSLType[unsigned long],IdentifierExpression[arg]],IntegerLiteral[0UL]]],BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[send],CastExpression[ACSLType[_Bool],IntegerLiteral[0]]],BinaryExpression[COMPEQ,IdentifierExpression[send],CastExpression[ACSLType[_Bool],IntegerLiteral[1]]]]],BinaryExpression[LOGICOR,BinaryExpression[LOGICOR,BinaryExpression[LOGICOR,BinaryExpression[LOGICOR,BinaryExpression[LOGICOR,BinaryExpression[COMPEQ,IdentifierExpression[i],IntegerLiteral[3]],BinaryExpression[COMPEQ,IdentifierExpression[i],IntegerLiteral[2]]],BinaryExpression[COMPEQ,IdentifierExpression[i],IntegerLiteral[1]]],BinaryExpression[LOGICAND,BinaryExpression[COMPEQ,IntegerLiteral[0],IdentifierExpression[i]],BinaryExpression[COMPEQ,IdentifierExpression[i],IntegerLiteral[0]]]],BinaryExpression[LOGICAND,BinaryExpression[COMPLEQ,IntegerLiteral[5],IdentifierExpression[i]],BinaryExpression[COMPLEQ,IdentifierExpression[i],IntegerLiteral[6]]]],BinaryExpression[COMPEQ,IdentifierExpression[i],IntegerLiteral[4]]]]]] VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] [L746] 2 reach_error() VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=1, i=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 746]: Unable to prove that invariant of correctness witness holds Unable to prove that invariant of correctness witness holds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 68 locations, 8 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: 19.8s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1831 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1737 mSDsluCounter, 207 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 175 mSDsCounter, 115 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4256 IncrementalHoareTripleChecker+Invalid, 4371 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 115 mSolverCounterUnsat, 32 mSDtfsCounter, 4256 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2592occurred in iteration=14, InterpolantAutomatonStates: 127, 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: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 369 NumberOfCodeBlocks, 369 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 376 ConstructedInterpolants, 1 QuantifiedInterpolants, 5803 SizeOfPredicates, 59 NumberOfNonLiveVariables, 2000 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 5/29 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 RESULT: Ultimate proved your program to be incorrect! [2024-01-31 17:43:48,829 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE