./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8857f20b Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/bigshot_s.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-8857f20-m [2024-01-29 22:49:41,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-29 22:49:41,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-29 22:49:41,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-29 22:49:41,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-29 22:49:41,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-29 22:49:41,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-29 22:49:41,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-29 22:49:41,440 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-29 22:49:41,444 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-29 22:49:41,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-29 22:49:41,445 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-29 22:49:41,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-29 22:49:41,446 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-29 22:49:41,447 INFO L153 SettingsManager]: * Use SBE=true [2024-01-29 22:49:41,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-29 22:49:41,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-29 22:49:41,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-29 22:49:41,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-29 22:49:41,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-29 22:49:41,448 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-29 22:49:41,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-29 22:49:41,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-29 22:49:41,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-29 22:49:41,450 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-29 22:49:41,450 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-29 22:49:41,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-29 22:49:41,451 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-29 22:49:41,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-29 22:49:41,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-29 22:49:41,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-29 22:49:41,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-29 22:49:41,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 22:49:41,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-29 22:49:41,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-29 22:49:41,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-29 22:49:41,454 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-29 22:49:41,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-29 22:49:41,455 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-29 22:49:41,455 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-29 22:49:41,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-29 22:49:41,455 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-29 22:49:41,456 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-29 22:49:41,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-29 22:49:41,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-29 22:49:41,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-29 22:49:41,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-29 22:49:41,776 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-29 22:49:41,777 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-29 22:49:41,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bigshot_s.yml/witness.yml [2024-01-29 22:49:41,868 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-29 22:49:41,869 INFO L274 PluginConnector]: CDTParser initialized [2024-01-29 22:49:41,869 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s.i [2024-01-29 22:49:43,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-29 22:49:43,300 INFO L384 CDTParser]: Found 1 translation units. [2024-01-29 22:49:43,300 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i [2024-01-29 22:49:43,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af46362/2f3a6e08c340446eb9dc64c7eb6c0aa7/FLAGd00af6c9f [2024-01-29 22:49:43,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6af46362/2f3a6e08c340446eb9dc64c7eb6c0aa7 [2024-01-29 22:49:43,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-29 22:49:43,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-29 22:49:43,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-29 22:49:43,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-29 22:49:43,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-29 22:49:43,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:49:41" (1/2) ... [2024-01-29 22:49:43,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145b7f3a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:49:43, skipping insertion in model container [2024-01-29 22:49:43,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:49:41" (1/2) ... [2024-01-29 22:49:43,356 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9ee62f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 29.01 10:49:43, skipping insertion in model container [2024-01-29 22:49:43,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:49:43" (2/2) ... [2024-01-29 22:49:43,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145b7f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:43, skipping insertion in model container [2024-01-29 22:49:43,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:49:43" (2/2) ... [2024-01-29 22:49:43,357 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-29 22:49:43,385 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-29 22:49:43,386 INFO L98 nessWitnessExtractor]: Location invariant before [L1111-L1111] (unsigned long )arg == 0UL [2024-01-29 22:49:43,387 INFO L98 nessWitnessExtractor]: Location invariant before [L1116-L1116] ((unsigned long )arg == 0UL) && ((unsigned long )arg == 0UL) [2024-01-29 22:49:43,387 INFO L98 nessWitnessExtractor]: Location invariant before [L1116-L1116] (unsigned long )arg == 0UL [2024-01-29 22:49:43,387 INFO L98 nessWitnessExtractor]: Location invariant before [L1112-L1112] (unsigned long )arg == 0UL [2024-01-29 22:49:43,387 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] (expression == 0) && (expression == 1) [2024-01-29 22:49:43,387 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] ((expression == 0) && (expression == 1)) && (0 <= expression) [2024-01-29 22:49:43,388 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] ((expression == 0) && (expression == 1)) && (expression <= 1) [2024-01-29 22:49:43,388 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] ((expression == 0) && (expression == 1)) && (expression == 0 || expression == 1) [2024-01-29 22:49:43,388 INFO L98 nessWitnessExtractor]: Location invariant before [L1107-L1107] expression == 0 [2024-01-29 22:49:43,388 INFO L98 nessWitnessExtractor]: Location invariant before [L1117-L1117] (unsigned long )arg == 0UL [2024-01-29 22:49:43,388 INFO L98 nessWitnessExtractor]: Location invariant before [L1122-L1122] v == 0 [2024-01-29 22:49:43,435 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-29 22:49:43,841 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i[55202,55215] [2024-01-29 22:49:43,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 22:49:43,880 INFO L202 MainTranslator]: Completed pre-run [2024-01-29 22:49:43,930 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s.i[55202,55215] [2024-01-29 22:49:43,931 WARN L424 MainDispatcher]: Unable to annotate void __VERIFIER_assert(int expression) { if (!expression) { ERROR: {reach_error();abort();}}; return; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-29 22:49:44,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-29 22:49:44,068 INFO L206 MainTranslator]: Completed translation [2024-01-29 22:49:44,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44 WrapperNode [2024-01-29 22:49:44,069 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-29 22:49:44,070 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-29 22:49:44,070 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-29 22:49:44,070 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-29 22:49:44,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,109 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,144 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2024-01-29 22:49:44,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-29 22:49:44,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-29 22:49:44,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-29 22:49:44,145 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-29 22:49:44,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,167 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,191 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 9, 2, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-01-29 22:49:44,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,192 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,216 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,219 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-29 22:49:44,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-29 22:49:44,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-29 22:49:44,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-29 22:49:44,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (1/1) ... [2024-01-29 22:49:44,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-29 22:49:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:44,266 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) [2024-01-29 22:49:44,286 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 [2024-01-29 22:49:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-29 22:49:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-29 22:49:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-01-29 22:49:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-01-29 22:49:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-01-29 22:49:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-01-29 22:49:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-01-29 22:49:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-29 22:49:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-29 22:49:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-29 22:49:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-29 22:49:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-29 22:49:44,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-29 22:49:44,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-29 22:49:44,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-29 22:49:44,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-29 22:49:44,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-29 22:49:44,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-29 22:49:44,318 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-29 22:49:44,453 INFO L244 CfgBuilder]: Building ICFG [2024-01-29 22:49:44,455 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-29 22:49:44,610 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-29 22:49:44,611 INFO L293 CfgBuilder]: Performing block encoding [2024-01-29 22:49:44,727 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-29 22:49:44,727 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-01-29 22:49:44,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:49:44 BoogieIcfgContainer [2024-01-29 22:49:44,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-29 22:49:44,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-29 22:49:44,732 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-29 22:49:44,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-29 22:49:44,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 29.01 10:49:41" (1/4) ... [2024-01-29 22:49:44,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c45dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 29.01 10:49:44, skipping insertion in model container [2024-01-29 22:49:44,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:49:43" (2/4) ... [2024-01-29 22:49:44,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c45dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:49:44, skipping insertion in model container [2024-01-29 22:49:44,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:49:44" (3/4) ... [2024-01-29 22:49:44,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c45dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:49:44, skipping insertion in model container [2024-01-29 22:49:44,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:49:44" (4/4) ... [2024-01-29 22:49:44,739 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-01-29 22:49:44,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-29 22:49:44,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-01-29 22:49:44,758 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-29 22:49:44,839 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-29 22:49:44,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 37 transitions, 88 flow [2024-01-29 22:49:44,921 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-01-29 22:49:44,922 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-29 22:49:44,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-29 22:49:44,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 37 transitions, 88 flow [2024-01-29 22:49:44,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-01-29 22:49:44,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-29 22:49:44,966 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;@397c9110, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-29 22:49:44,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-01-29 22:49:44,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-29 22:49:44,974 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-29 22:49:44,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:49:44,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-29 22:49:44,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:44,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:44,982 INFO L85 PathProgramCache]: Analyzing trace with hash 8013, now seen corresponding path program 1 times [2024-01-29 22:49:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342698644] [2024-01-29 22:49:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:44,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342698644] [2024-01-29 22:49:45,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342698644] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:45,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:45,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-29 22:49:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336620522] [2024-01-29 22:49:45,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 22:49:45,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 22:49:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 22:49:45,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-29 22:49:45,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-01-29 22:49:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-29 22:49:45,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:45,396 INFO L124 PetriNetUnfolderBase]: 10/57 cut-off events. [2024-01-29 22:49:45,397 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-29 22:49:45,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 57 events. 10/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 4 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 73. Up to 27 conditions per place. [2024-01-29 22:49:45,401 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 20 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-01-29 22:49:45,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 131 flow [2024-01-29 22:49:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 22:49:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 22:49:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-29 22:49:45,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-01-29 22:49:45,417 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-01-29 22:49:45,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 131 flow [2024-01-29 22:49:45,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-29 22:49:45,423 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 70 flow [2024-01-29 22:49:45,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-01-29 22:49:45,428 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-01-29 22:49:45,428 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 70 flow [2024-01-29 22:49:45,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-01-29 22:49:45,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:45,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-01-29 22:49:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-29 22:49:45,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:45,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:45,433 INFO L85 PathProgramCache]: Analyzing trace with hash 238988649, now seen corresponding path program 1 times [2024-01-29 22:49:45,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:45,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275431582] [2024-01-29 22:49:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:45,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275431582] [2024-01-29 22:49:45,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275431582] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:45,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:45,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:45,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958498546] [2024-01-29 22:49:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:45,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-29 22:49:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-01-29 22:49:45,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-29 22:49:45,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:45,706 INFO L124 PetriNetUnfolderBase]: 10/53 cut-off events. [2024-01-29 22:49:45,707 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:49:45,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 53 events. 10/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 5 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 54. Up to 34 conditions per place. [2024-01-29 22:49:45,710 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-01-29 22:49:45,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 106 flow [2024-01-29 22:49:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-01-29 22:49:45,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202702702702703 [2024-01-29 22:49:45,714 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 70 flow. Second operand 4 states and 77 transitions. [2024-01-29 22:49:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 106 flow [2024-01-29 22:49:45,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:45,720 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 64 flow [2024-01-29 22:49:45,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2024-01-29 22:49:45,721 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-01-29 22:49:45,722 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 64 flow [2024-01-29 22:49:45,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2024-01-29 22:49:45,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:45,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:45,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-29 22:49:45,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:45,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2125850883, now seen corresponding path program 1 times [2024-01-29 22:49:45,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:45,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078233549] [2024-01-29 22:49:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:45,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078233549] [2024-01-29 22:49:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078233549] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:45,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525968956] [2024-01-29 22:49:45,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:45,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-29 22:49:45,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-29 22:49:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-29 22:49:45,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-29 22:49:45,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-01-29 22:49:45,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:45,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-29 22:49:45,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:45,990 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2024-01-29 22:49:45,991 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:49:45,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 43 events. 10/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 2 based on Foata normal form. 4/46 useless extension candidates. Maximal degree in co-relation 69. Up to 18 conditions per place. [2024-01-29 22:49:45,992 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 17 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2024-01-29 22:49:45,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 98 flow [2024-01-29 22:49:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-29 22:49:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-29 22:49:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-01-29 22:49:45,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-29 22:49:45,997 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 64 flow. Second operand 4 states and 74 transitions. [2024-01-29 22:49:45,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 98 flow [2024-01-29 22:49:45,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 26 transitions, 95 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:46,001 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2024-01-29 22:49:46,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-01-29 22:49:46,003 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2024-01-29 22:49:46,003 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2024-01-29 22:49:46,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-01-29 22:49:46,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:46,004 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] [2024-01-29 22:49:46,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-29 22:49:46,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:46,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash -97788446, now seen corresponding path program 1 times [2024-01-29 22:49:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:46,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928847955] [2024-01-29 22:49:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:46,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:46,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928847955] [2024-01-29 22:49:46,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928847955] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:46,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:46,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-29 22:49:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687590192] [2024-01-29 22:49:46,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:46,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-29 22:49:46,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-29 22:49:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-29 22:49:46,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:46,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2024-01-29 22:49:46,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:46,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:46,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:46,181 INFO L124 PetriNetUnfolderBase]: 8/38 cut-off events. [2024-01-29 22:49:46,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-29 22:49:46,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 38 events. 8/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 4 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 64. Up to 26 conditions per place. [2024-01-29 22:49:46,182 INFO L140 encePairwiseOnDemand]: 35/37 looper letters, 17 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-01-29 22:49:46,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 95 flow [2024-01-29 22:49:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-29 22:49:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-29 22:49:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-01-29 22:49:46,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-01-29 22:49:46,187 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 67 transitions. [2024-01-29 22:49:46,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 95 flow [2024-01-29 22:49:46,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-29 22:49:46,189 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 56 flow [2024-01-29 22:49:46,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-01-29 22:49:46,191 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -6 predicate places. [2024-01-29 22:49:46,191 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 56 flow [2024-01-29 22:49:46,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2024-01-29 22:49:46,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:46,193 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, 1] [2024-01-29 22:49:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-29 22:49:46,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:46,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2072079997, now seen corresponding path program 1 times [2024-01-29 22:49:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:46,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658950622] [2024-01-29 22:49:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:46,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:46,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658950622] [2024-01-29 22:49:46,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658950622] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-29 22:49:46,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-29 22:49:46,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-29 22:49:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519412108] [2024-01-29 22:49:46,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-29 22:49:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-29 22:49:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-29 22:49:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-29 22:49:46,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:46,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2024-01-29 22:49:46,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:46,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:46,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:46,548 INFO L124 PetriNetUnfolderBase]: 12/48 cut-off events. [2024-01-29 22:49:46,549 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-29 22:49:46,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 48 events. 12/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 7 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 87. Up to 33 conditions per place. [2024-01-29 22:49:46,550 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 19 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2024-01-29 22:49:46,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 116 flow [2024-01-29 22:49:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-29 22:49:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-29 22:49:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-01-29 22:49:46,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545045045045045 [2024-01-29 22:49:46,552 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 56 flow. Second operand 6 states and 121 transitions. [2024-01-29 22:49:46,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 116 flow [2024-01-29 22:49:46,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 22:49:46,553 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 79 flow [2024-01-29 22:49:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-01-29 22:49:46,554 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-01-29 22:49:46,554 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 79 flow [2024-01-29 22:49:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2024-01-29 22:49:46,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:46,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:46,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-29 22:49:46,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:46,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 791657522, now seen corresponding path program 1 times [2024-01-29 22:49:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773439073] [2024-01-29 22:49:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773439073] [2024-01-29 22:49:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773439073] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926779102] [2024-01-29 22:49:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:46,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:46,824 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) [2024-01-29 22:49:46,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-29 22:49:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:46,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-29 22:49:46,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:47,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-29 22:49:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:47,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926779102] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:47,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-01-29 22:49:47,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581400457] [2024-01-29 22:49:47,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:47,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-29 22:49:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-29 22:49:47,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-01-29 22:49:47,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:47,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 79 flow. Second operand has 14 states, 14 states have (on average 19.5) internal successors, (273), 14 states have internal predecessors, (273), 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) [2024-01-29 22:49:47,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:47,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:47,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:47,355 INFO L124 PetriNetUnfolderBase]: 14/54 cut-off events. [2024-01-29 22:49:47,356 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-29 22:49:47,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 54 events. 14/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 7 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 119. Up to 33 conditions per place. [2024-01-29 22:49:47,357 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-01-29 22:49:47,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 149 flow [2024-01-29 22:49:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-29 22:49:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-29 22:49:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-01-29 22:49:47,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-01-29 22:49:47,358 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 79 flow. Second operand 7 states and 140 transitions. [2024-01-29 22:49:47,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 149 flow [2024-01-29 22:49:47,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-29 22:49:47,360 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 108 flow [2024-01-29 22:49:47,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2024-01-29 22:49:47,361 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2024-01-29 22:49:47,361 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 108 flow [2024-01-29 22:49:47,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.5) internal successors, (273), 14 states have internal predecessors, (273), 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) [2024-01-29 22:49:47,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:47,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:47,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-29 22:49:47,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-29 22:49:47,577 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:47,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1700220177, now seen corresponding path program 2 times [2024-01-29 22:49:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300434255] [2024-01-29 22:49:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:47,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:47,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:47,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300434255] [2024-01-29 22:49:47,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300434255] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:47,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814611890] [2024-01-29 22:49:47,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-29 22:49:47,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:47,816 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) [2024-01-29 22:49:47,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-29 22:49:47,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-29 22:49:47,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 22:49:47,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-29 22:49:47,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:48,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-29 22:49:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:48,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:48,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814611890] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:48,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:48,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-29 22:49:48,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953312434] [2024-01-29 22:49:48,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:48,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-29 22:49:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-29 22:49:48,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-29 22:49:48,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:48,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 19.235294117647058) internal successors, (327), 17 states have internal predecessors, (327), 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) [2024-01-29 22:49:48,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:48,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:48,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:48,373 INFO L124 PetriNetUnfolderBase]: 16/60 cut-off events. [2024-01-29 22:49:48,374 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-01-29 22:49:48,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 60 events. 16/60 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 7 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 159. Up to 33 conditions per place. [2024-01-29 22:49:48,376 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 23 selfloop transitions, 7 changer transitions 0/36 dead transitions. [2024-01-29 22:49:48,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 36 transitions, 190 flow [2024-01-29 22:49:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-29 22:49:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-29 22:49:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-01-29 22:49:48,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371621621621622 [2024-01-29 22:49:48,378 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 108 flow. Second operand 8 states and 159 transitions. [2024-01-29 22:49:48,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 36 transitions, 190 flow [2024-01-29 22:49:48,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 178 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-29 22:49:48,382 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 132 flow [2024-01-29 22:49:48,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2024-01-29 22:49:48,383 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-01-29 22:49:48,383 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 132 flow [2024-01-29 22:49:48,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.235294117647058) internal successors, (327), 17 states have internal predecessors, (327), 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) [2024-01-29 22:49:48,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:48,384 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:48,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-29 22:49:48,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-01-29 22:49:48,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:48,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:48,608 INFO L85 PathProgramCache]: Analyzing trace with hash 197062252, now seen corresponding path program 3 times [2024-01-29 22:49:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:48,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475229040] [2024-01-29 22:49:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:48,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:48,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:48,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475229040] [2024-01-29 22:49:48,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475229040] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:48,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891351245] [2024-01-29 22:49:48,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-29 22:49:48,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:48,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:48,865 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) [2024-01-29 22:49:48,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-29 22:49:48,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-29 22:49:48,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 22:49:48,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-29 22:49:48,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:49,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-29 22:49:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:49,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:49,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891351245] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:49,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-01-29 22:49:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105161689] [2024-01-29 22:49:49,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:49,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-29 22:49:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-29 22:49:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-01-29 22:49:49,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:49,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 132 flow. Second operand has 20 states, 20 states have (on average 19.05) internal successors, (381), 20 states have internal predecessors, (381), 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) [2024-01-29 22:49:49,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:49,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:49,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:49,444 INFO L124 PetriNetUnfolderBase]: 18/66 cut-off events. [2024-01-29 22:49:49,444 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-01-29 22:49:49,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 66 events. 18/66 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 7 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 195. Up to 33 conditions per place. [2024-01-29 22:49:49,446 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 25 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2024-01-29 22:49:49,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 39 transitions, 226 flow [2024-01-29 22:49:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-29 22:49:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-29 22:49:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-01-29 22:49:49,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345345345345346 [2024-01-29 22:49:49,447 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 132 flow. Second operand 9 states and 178 transitions. [2024-01-29 22:49:49,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 39 transitions, 226 flow [2024-01-29 22:49:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 39 transitions, 208 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-01-29 22:49:49,452 INFO L231 Difference]: Finished difference. Result has 52 places, 33 transitions, 156 flow [2024-01-29 22:49:49,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2024-01-29 22:49:49,455 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-01-29 22:49:49,455 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 156 flow [2024-01-29 22:49:49,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.05) internal successors, (381), 20 states have internal predecessors, (381), 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) [2024-01-29 22:49:49,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:49,456 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:49,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-29 22:49:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:49,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:49,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1875624279, now seen corresponding path program 4 times [2024-01-29 22:49:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:49,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826717861] [2024-01-29 22:49:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:49,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826717861] [2024-01-29 22:49:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826717861] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146293039] [2024-01-29 22:49:50,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-29 22:49:50,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:50,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:50,021 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) [2024-01-29 22:49:50,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-29 22:49:50,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-29 22:49:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 22:49:50,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-29 22:49:50,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:50,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-29 22:49:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:50,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:50,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146293039] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:50,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:50,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-29 22:49:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622621389] [2024-01-29 22:49:50,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-29 22:49:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-29 22:49:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-01-29 22:49:50,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:50,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 156 flow. Second operand has 23 states, 23 states have (on average 18.91304347826087) internal successors, (435), 23 states have internal predecessors, (435), 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) [2024-01-29 22:49:50,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:50,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:50,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:50,865 INFO L124 PetriNetUnfolderBase]: 20/72 cut-off events. [2024-01-29 22:49:50,866 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-01-29 22:49:50,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 72 events. 20/72 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 7 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 231. Up to 33 conditions per place. [2024-01-29 22:49:50,870 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 27 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2024-01-29 22:49:50,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 42 transitions, 262 flow [2024-01-29 22:49:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-29 22:49:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-29 22:49:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-01-29 22:49:50,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324324324324324 [2024-01-29 22:49:50,872 INFO L175 Difference]: Start difference. First operand has 52 places, 33 transitions, 156 flow. Second operand 10 states and 197 transitions. [2024-01-29 22:49:50,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 42 transitions, 262 flow [2024-01-29 22:49:50,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 42 transitions, 238 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-01-29 22:49:50,875 INFO L231 Difference]: Finished difference. Result has 57 places, 35 transitions, 180 flow [2024-01-29 22:49:50,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=57, PETRI_TRANSITIONS=35} [2024-01-29 22:49:50,876 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2024-01-29 22:49:50,877 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 35 transitions, 180 flow [2024-01-29 22:49:50,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.91304347826087) internal successors, (435), 23 states have internal predecessors, (435), 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) [2024-01-29 22:49:50,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:50,877 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:50,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-29 22:49:51,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:51,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:51,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:51,093 INFO L85 PathProgramCache]: Analyzing trace with hash -862555226, now seen corresponding path program 5 times [2024-01-29 22:49:51,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:51,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489517358] [2024-01-29 22:49:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:51,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489517358] [2024-01-29 22:49:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489517358] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:51,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883261840] [2024-01-29 22:49:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-29 22:49:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:51,408 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) [2024-01-29 22:49:51,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-29 22:49:51,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-01-29 22:49:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 22:49:51,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-29 22:49:51,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:51,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-29 22:49:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:51,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:51,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883261840] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:51,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:51,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-01-29 22:49:51,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430215597] [2024-01-29 22:49:51,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:51,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-29 22:49:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-29 22:49:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-01-29 22:49:51,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:51,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 35 transitions, 180 flow. Second operand has 26 states, 26 states have (on average 18.807692307692307) internal successors, (489), 26 states have internal predecessors, (489), 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) [2024-01-29 22:49:51,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:51,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:51,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:52,294 INFO L124 PetriNetUnfolderBase]: 22/78 cut-off events. [2024-01-29 22:49:52,294 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2024-01-29 22:49:52,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 78 events. 22/78 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 7 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 267. Up to 33 conditions per place. [2024-01-29 22:49:52,295 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 29 selfloop transitions, 10 changer transitions 0/45 dead transitions. [2024-01-29 22:49:52,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 45 transitions, 298 flow [2024-01-29 22:49:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-29 22:49:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-29 22:49:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-01-29 22:49:52,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307125307125307 [2024-01-29 22:49:52,297 INFO L175 Difference]: Start difference. First operand has 57 places, 35 transitions, 180 flow. Second operand 11 states and 216 transitions. [2024-01-29 22:49:52,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 45 transitions, 298 flow [2024-01-29 22:49:52,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 45 transitions, 268 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-29 22:49:52,300 INFO L231 Difference]: Finished difference. Result has 62 places, 37 transitions, 204 flow [2024-01-29 22:49:52,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=204, PETRI_PLACES=62, PETRI_TRANSITIONS=37} [2024-01-29 22:49:52,300 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-01-29 22:49:52,301 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 37 transitions, 204 flow [2024-01-29 22:49:52,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.807692307692307) internal successors, (489), 26 states have internal predecessors, (489), 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) [2024-01-29 22:49:52,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:52,301 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:52,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-29 22:49:52,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-29 22:49:52,516 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:52,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2034195811, now seen corresponding path program 6 times [2024-01-29 22:49:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123036806] [2024-01-29 22:49:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:52,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123036806] [2024-01-29 22:49:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123036806] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023946158] [2024-01-29 22:49:52,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-29 22:49:52,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:52,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:52,848 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) [2024-01-29 22:49:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-29 22:49:52,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-01-29 22:49:52,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-29 22:49:52,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-29 22:49:52,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:53,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-29 22:49:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:53,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-29 22:49:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:53,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023946158] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-29 22:49:53,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-29 22:49:53,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-01-29 22:49:53,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708134866] [2024-01-29 22:49:53,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-29 22:49:53,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-29 22:49:53,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-29 22:49:53,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-29 22:49:53,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-01-29 22:49:53,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-29 22:49:53,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 37 transitions, 204 flow. Second operand has 29 states, 29 states have (on average 18.724137931034484) internal successors, (543), 29 states have internal predecessors, (543), 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) [2024-01-29 22:49:53,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-29 22:49:53,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-29 22:49:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-29 22:49:53,915 INFO L124 PetriNetUnfolderBase]: 24/84 cut-off events. [2024-01-29 22:49:53,915 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-01-29 22:49:53,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 84 events. 24/84 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 7 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 303. Up to 33 conditions per place. [2024-01-29 22:49:53,916 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 31 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-01-29 22:49:53,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 48 transitions, 334 flow [2024-01-29 22:49:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-29 22:49:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-29 22:49:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-01-29 22:49:53,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2024-01-29 22:49:53,918 INFO L175 Difference]: Start difference. First operand has 62 places, 37 transitions, 204 flow. Second operand 12 states and 235 transitions. [2024-01-29 22:49:53,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 48 transitions, 334 flow [2024-01-29 22:49:53,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 48 transitions, 298 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-01-29 22:49:53,921 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 228 flow [2024-01-29 22:49:53,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=228, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-01-29 22:49:53,922 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2024-01-29 22:49:53,922 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 228 flow [2024-01-29 22:49:53,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 18.724137931034484) internal successors, (543), 29 states have internal predecessors, (543), 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) [2024-01-29 22:49:53,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-29 22:49:53,923 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-29 22:49:53,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-29 22:49:54,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:54,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 11 more)] === [2024-01-29 22:49:54,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-29 22:49:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1621832736, now seen corresponding path program 7 times [2024-01-29 22:49:54,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-29 22:49:54,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673674737] [2024-01-29 22:49:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-29 22:49:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-29 22:49:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:55,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-29 22:49:55,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673674737] [2024-01-29 22:49:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673674737] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-29 22:49:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776780977] [2024-01-29 22:49:55,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-29 22:49:55,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-29 22:49:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-29 22:49:55,660 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) [2024-01-29 22:49:55,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-29 22:49:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-29 22:49:55,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-29 22:49:55,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-29 22:49:55,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-01-29 22:49:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-29 22:49:55,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:55,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-29 22:49:55,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-29 22:49:56,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:56,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-29 22:49:56,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-29 22:49:56,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:56,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-29 22:49:56,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:56,242 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2024-01-29 22:49:56,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-01-29 22:49:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-29 22:49:56,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... Killed by 15