/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/gemcutter/NewStatesSleepPersistentFixedOrder.epf --traceabstraction.cegar.restart.behaviour ONE_CEGAR_PER_THREAD_INSTANCE --traceabstraction.maximal.amount.of.steps.the.threads.are.allowed.to.take.successively 1 --traceabstraction.enable.heuristic.with.loops.as.step.type false --traceabstraction.considered.threads.and.their.maximal.amount.of.steps X --traceabstraction.defines.what.statements.are.considered.a.step.in.por LOOP -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.orders-218013a [2023-05-04 20:16:11,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-05-04 20:16:11,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-05-04 20:16:11,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-05-04 20:16:11,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-05-04 20:16:11,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-05-04 20:16:11,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-05-04 20:16:11,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-05-04 20:16:11,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-05-04 20:16:11,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-05-04 20:16:11,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-05-04 20:16:11,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-05-04 20:16:11,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-05-04 20:16:11,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-05-04 20:16:11,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-05-04 20:16:11,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-05-04 20:16:11,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-05-04 20:16:11,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-05-04 20:16:11,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-05-04 20:16:11,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-05-04 20:16:11,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-05-04 20:16:11,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-05-04 20:16:11,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-05-04 20:16:11,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-05-04 20:16:11,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-05-04 20:16:11,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-05-04 20:16:11,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-05-04 20:16:11,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-05-04 20:16:11,509 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-05-04 20:16:11,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-05-04 20:16:11,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-05-04 20:16:11,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-05-04 20:16:11,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-05-04 20:16:11,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-05-04 20:16:11,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-05-04 20:16:11,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-05-04 20:16:11,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-05-04 20:16:11,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-05-04 20:16:11,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-05-04 20:16:11,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-05-04 20:16:11,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-05-04 20:16:11,517 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/gemcutter/NewStatesSleepPersistentFixedOrder.epf [2023-05-04 20:16:11,545 INFO L113 SettingsManager]: Loading preferences was successful [2023-05-04 20:16:11,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-05-04 20:16:11,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-05-04 20:16:11,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-05-04 20:16:11,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-05-04 20:16:11,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-05-04 20:16:11,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-05-04 20:16:11,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-05-04 20:16:11,547 INFO L138 SettingsManager]: * Use SBE=true [2023-05-04 20:16:11,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-05-04 20:16:11,548 INFO L138 SettingsManager]: * sizeof long=4 [2023-05-04 20:16:11,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * sizeof long double=12 [2023-05-04 20:16:11,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-05-04 20:16:11,550 INFO L138 SettingsManager]: * Use constant arrays=true [2023-05-04 20:16:11,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-05-04 20:16:11,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-05-04 20:16:11,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-05-04 20:16:11,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-05-04 20:16:11,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-05-04 20:16:11,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-05-04 20:16:11,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-05-04 20:16:11,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-05-04 20:16:11,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-05-04 20:16:11,552 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-05-04 20:16:11,552 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2023-05-04 20:16:11,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-05-04 20:16:11,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-05-04 20:16:11,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2023-05-04 20:16:11,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-05-04 20:16:11,553 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2023-05-04 20:16:11,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: CEGAR restart behaviour -> ONE_CEGAR_PER_THREAD_INSTANCE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Maximal amount of steps the threads are allowed to take successively -> 1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Enable heuristic with loops as step type -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Considered threads and their maximal amount of steps -> X Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Defines what statements are considered a step in POR -> LOOP [2023-05-04 20:16:11,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-05-04 20:16:11,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-05-04 20:16:11,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-05-04 20:16:11,800 INFO L271 PluginConnector]: Initializing CDTParser... [2023-05-04 20:16:11,801 INFO L275 PluginConnector]: CDTParser initialized [2023-05-04 20:16:11,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i [2023-05-04 20:16:11,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec4425508/f62fdf1b71dc4ff2b845a7d8c26f7739/FLAGe480fbc9a [2023-05-04 20:16:12,307 INFO L306 CDTParser]: Found 1 translation units. [2023-05-04 20:16:12,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i [2023-05-04 20:16:12,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec4425508/f62fdf1b71dc4ff2b845a7d8c26f7739/FLAGe480fbc9a [2023-05-04 20:16:12,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec4425508/f62fdf1b71dc4ff2b845a7d8c26f7739 [2023-05-04 20:16:12,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-05-04 20:16:12,592 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-05-04 20:16:12,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-05-04 20:16:12,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-05-04 20:16:12,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-05-04 20:16:12,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.05 08:16:12" (1/1) ... [2023-05-04 20:16:12,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74cc96f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:12, skipping insertion in model container [2023-05-04 20:16:12,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.05 08:16:12" (1/1) ... [2023-05-04 20:16:12,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-05-04 20:16:12,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-05-04 20:16:12,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i[47038,47051] [2023-05-04 20:16:12,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-05-04 20:16:12,988 INFO L203 MainTranslator]: Completed pre-run [2023-05-04 20:16:13,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_83-list2_racing1.i[47038,47051] [2023-05-04 20:16:13,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-05-04 20:16:13,074 INFO L208 MainTranslator]: Completed translation [2023-05-04 20:16:13,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13 WrapperNode [2023-05-04 20:16:13,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-05-04 20:16:13,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-05-04 20:16:13,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-05-04 20:16:13,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-05-04 20:16:13,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,123 INFO L138 Inliner]: procedures = 279, calls = 86, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 339 [2023-05-04 20:16:13,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-05-04 20:16:13,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-05-04 20:16:13,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-05-04 20:16:13,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-05-04 20:16:13,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-05-04 20:16:13,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-05-04 20:16:13,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-05-04 20:16:13,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-05-04 20:16:13,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (1/1) ... [2023-05-04 20:16:13,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-05-04 20:16:13,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:13,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-05-04 20:16:13,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-05-04 20:16:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-05-04 20:16:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-05-04 20:16:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-05-04 20:16:13,230 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-05-04 20:16:13,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-05-04 20:16:13,235 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2023-05-04 20:16:13,235 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-05-04 20:16:13,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-05-04 20:16:13,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-05-04 20:16:13,237 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2023-05-04 20:16:13,481 INFO L235 CfgBuilder]: Building ICFG [2023-05-04 20:16:13,482 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-05-04 20:16:13,912 INFO L276 CfgBuilder]: Performing block encoding [2023-05-04 20:16:13,921 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-05-04 20:16:13,921 INFO L300 CfgBuilder]: Removed 28 assume(true) statements. [2023-05-04 20:16:13,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.05 08:16:13 BoogieIcfgContainer [2023-05-04 20:16:13,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-05-04 20:16:13,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-05-04 20:16:13,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-05-04 20:16:13,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-05-04 20:16:13,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.05 08:16:12" (1/3) ... [2023-05-04 20:16:13,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337a18a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.05 08:16:13, skipping insertion in model container [2023-05-04 20:16:13,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.05 08:16:13" (2/3) ... [2023-05-04 20:16:13,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337a18a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.05 08:16:13, skipping insertion in model container [2023-05-04 20:16:13,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.05 08:16:13" (3/3) ... [2023-05-04 20:16:13,938 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_83-list2_racing1.i [2023-05-04 20:16:13,945 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-05-04 20:16:13,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-05-04 20:16:13,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-05-04 20:16:13,952 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-05-04 20:16:14,098 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-05-04 20:16:14,154 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:16:14,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-05-04 20:16:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:14,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-05-04 20:16:14,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2023-05-04 20:16:14,195 INFO L162 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-05-04 20:16:14,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t3_funThread1of1ForFork0 ======== [2023-05-04 20:16:14,228 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7de9bf9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:16:14,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-05-04 20:16:23,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:16:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:16:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1369075369, now seen corresponding path program 1 times [2023-05-04 20:16:23,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:16:23,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057026377] [2023-05-04 20:16:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:16:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2023-05-04 20:16:24,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:16:24,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057026377] [2023-05-04 20:16:24,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057026377] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:16:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173079327] [2023-05-04 20:16:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:24,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:24,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:24,649 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) [2023-05-04 20:16:24,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-05-04 20:16:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 1 conjunts are in the unsatisfiable core [2023-05-04 20:16:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:16:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-05-04 20:16:24,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-05-04 20:16:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173079327] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:16:24,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-05-04 20:16:24,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-05-04 20:16:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105145089] [2023-05-04 20:16:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:16:25,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-05-04 20:16:25,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:16:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-05-04 20:16:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-05-04 20:16:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:25,018 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:16:25,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 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) [2023-05-04 20:16:25,019 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:48,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-05-04 20:16:48,282 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,SelfDestructingSolverStorable0 [2023-05-04 20:16:48,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:16:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:16:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2015546059, now seen corresponding path program 1 times [2023-05-04 20:16:48,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:16:48,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297278687] [2023-05-04 20:16:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:16:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-05-04 20:16:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:16:48,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297278687] [2023-05-04 20:16:48,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297278687] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:16:48,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826543500] [2023-05-04 20:16:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:48,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:48,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:48,736 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) [2023-05-04 20:16:48,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-05-04 20:16:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 2 conjunts are in the unsatisfiable core [2023-05-04 20:16:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:16:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-05-04 20:16:49,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-05-04 20:16:49,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826543500] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:16:49,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-05-04 20:16:49,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-05-04 20:16:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971071023] [2023-05-04 20:16:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:16:49,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-05-04 20:16:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:16:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-05-04 20:16:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-05-04 20:16:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:49,037 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:16:49,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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) [2023-05-04 20:16:49,037 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:49,038 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:49,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-05-04 20:16:49,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:49,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:16:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:16:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -660600233, now seen corresponding path program 1 times [2023-05-04 20:16:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:16:49,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947330594] [2023-05-04 20:16:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:16:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-05-04 20:16:49,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:16:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947330594] [2023-05-04 20:16:49,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947330594] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:16:49,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534614721] [2023-05-04 20:16:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:49,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:49,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:49,704 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) [2023-05-04 20:16:49,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-05-04 20:16:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:49,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2023-05-04 20:16:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:16:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-05-04 20:16:49,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-05-04 20:16:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534614721] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:16:49,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-05-04 20:16:49,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-05-04 20:16:49,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185731620] [2023-05-04 20:16:49,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:16:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-05-04 20:16:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:16:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-05-04 20:16:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-05-04 20:16:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:49,987 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:16:49,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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) [2023-05-04 20:16:49,988 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:49,988 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:49,988 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-05-04 20:16:50,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:50,249 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:16:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:16:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash -970075825, now seen corresponding path program 1 times [2023-05-04 20:16:50,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:16:50,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757135088] [2023-05-04 20:16:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:50,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:16:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-05-04 20:16:50,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:16:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757135088] [2023-05-04 20:16:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757135088] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:16:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926807333] [2023-05-04 20:16:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:50,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:50,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:50,447 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) [2023-05-04 20:16:50,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-05-04 20:16:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 2 conjunts are in the unsatisfiable core [2023-05-04 20:16:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:16:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-05-04 20:16:50,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-05-04 20:16:50,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926807333] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:16:50,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-05-04 20:16:50,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-05-04 20:16:50,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784126985] [2023-05-04 20:16:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:16:50,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-05-04 20:16:50,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:16:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-05-04 20:16:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-05-04 20:16:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:50,700 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:16:50,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2023-05-04 20:16:50,701 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:50,701 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,701 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,701 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:50,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-05-04 20:16:50,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:50,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:16:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:16:50,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1394713952, now seen corresponding path program 1 times [2023-05-04 20:16:50,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:16:50,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498254761] [2023-05-04 20:16:50,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:50,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:16:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-05-04 20:16:51,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:16:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498254761] [2023-05-04 20:16:51,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498254761] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:16:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724588003] [2023-05-04 20:16:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:16:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:16:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:16:51,166 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) [2023-05-04 20:16:51,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-05-04 20:16:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:16:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 4 conjunts are in the unsatisfiable core [2023-05-04 20:16:51,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:16:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-05-04 20:16:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-05-04 20:16:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-05-04 20:16:51,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724588003] provided 0 perfect and 2 imperfect interpolant sequences [2023-05-04 20:16:51,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-05-04 20:16:51,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-05-04 20:16:51,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127738716] [2023-05-04 20:16:51,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-05-04 20:16:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-05-04 20:16:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:16:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-05-04 20:16:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-05-04 20:16:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:51,573 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:16:51,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 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) [2023-05-04 20:16:51,573 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:16:51,574 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:51,574 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:51,574 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:16:51,574 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:17:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:17:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:17:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-05-04 20:17:00,206 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-05-04 20:17:00,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-05-04 20:17:00,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:17:00,436 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-05-04 20:17:00,437 INFO L307 ceAbstractionStarter]: Result for error location t3_funThread1of1ForFork0 was SAFE (1/3) [2023-05-04 20:17:00,442 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:17:00,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-05-04 20:17:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:17:00,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-05-04 20:17:00,447 INFO L162 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-05-04 20:17:00,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2023-05-04 20:17:00,450 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7de9bf9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:17:00,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-05-04 20:17:00,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process [2023-05-04 20:17:04,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-05-04 20:17:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:17:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1191044386, now seen corresponding path program 1 times [2023-05-04 20:17:04,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:17:04,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945810741] [2023-05-04 20:17:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:17:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:17:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-05-04 20:17:04,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-05-04 20:17:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-05-04 20:17:04,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-05-04 20:17:04,846 INFO L359 BasicCegarLoop]: Counterexample is feasible [2023-05-04 20:17:04,846 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-05-04 20:17:04,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-05-04 20:17:04,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-05-04 20:17:04,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-05-04 20:17:04,849 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2023-05-04 20:17:04,849 INFO L307 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN,UNKNOWN (2/3) [2023-05-04 20:17:04,850 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-05-04 20:17:04,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-05-04 20:17:04,920 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-05-04 20:17:04,925 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:17:04,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-05-04 20:17:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:17:04,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-05-04 20:17:04,937 INFO L162 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-05-04 20:17:04,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread1of2ForFork2 ======== [2023-05-04 20:17:04,941 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7de9bf9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:17:04,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-05-04 20:17:04,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (9)] Waiting until timeout for monitored process [2023-05-04 20:17:17,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:17:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:17:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2120575272, now seen corresponding path program 1 times [2023-05-04 20:17:17,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:17:17,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262715210] [2023-05-04 20:17:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:17:17,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:17:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:17:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-05-04 20:17:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:17:17,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262715210] [2023-05-04 20:17:17,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262715210] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:17:17,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-05-04 20:17:17,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-05-04 20:17:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459782540] [2023-05-04 20:17:17,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:17:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-05-04 20:17:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:17:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-05-04 20:17:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-05-04 20:17:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:17,829 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:17:17,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.0) internal successors, (252), 2 states have internal predecessors, (252), 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) [2023-05-04 20:17:17,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:17,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-05-04 20:17:17,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:17:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:17:17,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2077029827, now seen corresponding path program 1 times [2023-05-04 20:17:17,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:17:17,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448022740] [2023-05-04 20:17:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:17:17,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:17:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:17:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-05-04 20:17:18,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:17:18,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448022740] [2023-05-04 20:17:18,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448022740] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:17:18,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-05-04 20:17:18,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-05-04 20:17:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069118929] [2023-05-04 20:17:18,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:17:18,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-05-04 20:17:18,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:17:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-05-04 20:17:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-05-04 20:17:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:18,008 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:17:18,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2023-05-04 20:17:18,008 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:18,008 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:17:18,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-05-04 20:17:18,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:17:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:17:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1490397773, now seen corresponding path program 1 times [2023-05-04 20:17:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:17:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750333069] [2023-05-04 20:17:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:17:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:17:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:17:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-05-04 20:17:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:17:18,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750333069] [2023-05-04 20:17:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750333069] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:17:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483153529] [2023-05-04 20:17:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:17:18,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:17:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:17:18,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-05-04 20:17:18,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-05-04 20:17:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:17:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 6 conjunts are in the unsatisfiable core [2023-05-04 20:17:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:17:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-05-04 20:17:18,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-05-04 20:17:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-05-04 20:17:18,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483153529] provided 0 perfect and 2 imperfect interpolant sequences [2023-05-04 20:17:18,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-05-04 20:17:18,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-05-04 20:17:18,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951063408] [2023-05-04 20:17:18,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-05-04 20:17:18,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-05-04 20:17:18,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:17:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-05-04 20:17:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-05-04 20:17:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:18,939 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:17:18,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.357142857142858) internal successors, (341), 14 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-05-04 20:17:18,939 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:17:18,939 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:17:18,939 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:18:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-05-04 20:18:07,117 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-05-04 20:18:07,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-05-04 20:18:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:18:07,342 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-05-04 20:18:07,342 INFO L307 ceAbstractionStarter]: Result for error location t2_funThread1of2ForFork2 was SAFE (1/5) [2023-05-04 20:18:07,347 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:18:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-05-04 20:18:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:18:07,348 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-05-04 20:18:07,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (11)] Waiting until timeout for monitored process [2023-05-04 20:18:07,354 INFO L162 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-05-04 20:18:07,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2_funThread2of2ForFork2 ======== [2023-05-04 20:18:07,363 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7de9bf9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:18:07,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-05-04 20:18:20,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:18:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:18:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash -360807591, now seen corresponding path program 1 times [2023-05-04 20:18:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:18:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103562457] [2023-05-04 20:18:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:18:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:18:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:18:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-05-04 20:18:20,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:18:20,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103562457] [2023-05-04 20:18:20,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103562457] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:18:20,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-05-04 20:18:20,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-05-04 20:18:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419456616] [2023-05-04 20:18:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:18:20,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-05-04 20:18:20,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:18:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-05-04 20:18:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-05-04 20:18:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:20,360 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:18:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 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) [2023-05-04 20:18:20,361 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-05-04 20:18:29,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:18:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:18:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -751383167, now seen corresponding path program 1 times [2023-05-04 20:18:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:18:29,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028567387] [2023-05-04 20:18:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:18:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:18:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:18:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-05-04 20:18:29,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:18:29,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028567387] [2023-05-04 20:18:29,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028567387] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:18:29,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-05-04 20:18:29,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-05-04 20:18:29,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095518832] [2023-05-04 20:18:29,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:18:29,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-05-04 20:18:29,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:18:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-05-04 20:18:29,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-05-04 20:18:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:29,801 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:18:29,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-05-04 20:18:29,802 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:29,802 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:18:29,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-05-04 20:18:29,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:18:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:18:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1210366062, now seen corresponding path program 1 times [2023-05-04 20:18:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:18:29,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597366741] [2023-05-04 20:18:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:18:29,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:18:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:18:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-05-04 20:18:30,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:18:30,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597366741] [2023-05-04 20:18:30,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597366741] provided 0 perfect and 1 imperfect interpolant sequences [2023-05-04 20:18:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247405426] [2023-05-04 20:18:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:18:30,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-05-04 20:18:30,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:18:30,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-05-04 20:18:30,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-05-04 20:18:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:18:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 6 conjunts are in the unsatisfiable core [2023-05-04 20:18:30,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-05-04 20:18:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-05-04 20:18:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-05-04 20:18:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-05-04 20:18:30,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247405426] provided 0 perfect and 2 imperfect interpolant sequences [2023-05-04 20:18:30,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-05-04 20:18:30,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-05-04 20:18:30,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459396760] [2023-05-04 20:18:30,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-05-04 20:18:30,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-05-04 20:18:30,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:18:30,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-05-04 20:18:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-05-04 20:18:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:30,631 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:18:30,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.714285714285715) internal successors, (360), 14 states have internal predecessors, (360), 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) [2023-05-04 20:18:30,631 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:18:30,631 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:18:30,631 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:19:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:19:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-05-04 20:19:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-05-04 20:19:18,650 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-05-04 20:19:18,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-05-04 20:19:18,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-05-04 20:19:18,852 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-05-04 20:19:18,853 INFO L307 ceAbstractionStarter]: Result for error location t2_funThread2of2ForFork2 was SAFE (2/5) [2023-05-04 20:19:18,859 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:19:18,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2023-05-04 20:19:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-05-04 20:19:18,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2023-05-04 20:19:18,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (13)] Waiting until timeout for monitored process [2023-05-04 20:19:18,868 INFO L162 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2023-05-04 20:19:18,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t3_funThread1of2ForFork0 ======== [2023-05-04 20:19:18,871 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=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7de9bf9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-05-04 20:19:18,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-05-04 20:19:51,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t3_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-05-04 20:19:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-05-04 20:19:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -71172845, now seen corresponding path program 1 times [2023-05-04 20:19:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-05-04 20:19:51,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788893468] [2023-05-04 20:19:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-05-04 20:19:51,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-05-04 20:19:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-05-04 20:19:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2023-05-04 20:19:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-05-04 20:19:51,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788893468] [2023-05-04 20:19:51,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788893468] provided 1 perfect and 0 imperfect interpolant sequences [2023-05-04 20:19:51,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-05-04 20:19:51,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-05-04 20:19:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915545667] [2023-05-04 20:19:51,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-05-04 20:19:51,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-05-04 20:19:51,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-05-04 20:19:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-05-04 20:19:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-05-04 20:19:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-05-04 20:19:51,829 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2023-05-04 20:19:51,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 180.0) internal successors, (360), 2 states have internal predecessors, (360), 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) [2023-05-04 20:19:51,829 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.