/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:40:24,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:40:24,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:40:24,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:40:24,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:40:24,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:40:24,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:40:24,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:40:24,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:40:24,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:40:24,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:40:24,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:40:24,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:40:24,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:40:24,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:40:24,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:40:24,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:40:24,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:40:24,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:40:24,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:40:24,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:40:24,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:40:24,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:40:24,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:40:24,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:40:24,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:40:24,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:40:24,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:40:24,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:40:24,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:40:24,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:40:24,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:40:24,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:40:24,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:40:24,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:40:24,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:40:24,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:40:24,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:40:24,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:40:24,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:40:24,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:40:24,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:40:24,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:40:24,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:40:24,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:40:24,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:40:24,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:40:24,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:40:24,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:40:24,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:40:24,553 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:40:24,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:40:24,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:40:24,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:40:24,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:40:24,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:40:24,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:24,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:40:24,556 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:40:24,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:40:24,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:40:24,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:40:24,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:40:24,743 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:40:24,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2022-01-10 06:40:24,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71acbca05/73414e2acef0448cab4b70e29adaeee3/FLAG2384c1224 [2022-01-10 06:40:25,135 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:40:25,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2022-01-10 06:40:25,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71acbca05/73414e2acef0448cab4b70e29adaeee3/FLAG2384c1224 [2022-01-10 06:40:25,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71acbca05/73414e2acef0448cab4b70e29adaeee3 [2022-01-10 06:40:25,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:40:25,153 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:40:25,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:25,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:40:25,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:40:25,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f30eb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25, skipping insertion in model container [2022-01-10 06:40:25,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:40:25,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:40:25,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2022-01-10 06:40:25,294 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 06:40:25,295 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 06:40:25,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:25,324 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 06:40:25,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:40:25,329 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2022-01-10 06:40:25,333 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 06:40:25,334 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 06:40:25,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:25,347 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:40:25,355 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2022-01-10 06:40:25,361 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 06:40:25,361 WARN L1533 CHandler]: Possible shadowing of function min [2022-01-10 06:40:25,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:40:25,376 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:40:25,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25 WrapperNode [2022-01-10 06:40:25,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:40:25,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:25,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:40:25,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:40:25,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,405 INFO L137 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2022-01-10 06:40:25,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:40:25,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:40:25,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:40:25,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:40:25,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:40:25,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:40:25,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:40:25,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:40:25,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (1/1) ... [2022-01-10 06:40:25,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:40:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:40:25,474 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) [2022-01-10 06:40:25,475 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 [2022-01-10 06:40:25,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-01-10 06:40:25,501 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-01-10 06:40:25,501 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-01-10 06:40:25,501 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 06:40:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-01-10 06:40:25,501 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-01-10 06:40:25,502 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:40:25,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 06:40:25,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-01-10 06:40:25,502 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 06:40:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 06:40:25,569 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:40:25,571 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:40:25,919 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:40:25,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:40:25,923 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 06:40:25,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:25 BoogieIcfgContainer [2022-01-10 06:40:25,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:40:25,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:40:25,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:40:25,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:40:25,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:40:25" (1/3) ... [2022-01-10 06:40:25,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78921468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:25, skipping insertion in model container [2022-01-10 06:40:25,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:40:25" (2/3) ... [2022-01-10 06:40:25,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78921468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:40:25, skipping insertion in model container [2022-01-10 06:40:25,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:40:25" (3/3) ... [2022-01-10 06:40:25,930 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2022-01-10 06:40:25,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:40:25,933 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:40:25,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:40:25,968 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:40:25,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:40:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 06:40:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:40:25,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:25,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:25,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2087449709, now seen corresponding path program 1 times [2022-01-10 06:40:25,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:25,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805461104] [2022-01-10 06:40:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:25,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:25,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:25,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:25,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:40:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:40:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:40:26,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:26,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805461104] [2022-01-10 06:40:26,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805461104] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:26,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:26,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:40:26,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507576931] [2022-01-10 06:40:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:26,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:40:26,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:40:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:40:26,269 INFO L87 Difference]: Start difference. First operand has 87 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:40:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:26,310 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2022-01-10 06:40:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:40:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-01-10 06:40:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:26,318 INFO L225 Difference]: With dead ends: 151 [2022-01-10 06:40:26,318 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 06:40:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:40:26,323 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:26,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 431 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:40:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 06:40:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-10 06:40:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2022-01-10 06:40:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2022-01-10 06:40:26,359 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 37 [2022-01-10 06:40:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:26,359 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2022-01-10 06:40:26,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:40:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2022-01-10 06:40:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 06:40:26,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:26,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:26,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 06:40:26,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:26,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -277331900, now seen corresponding path program 1 times [2022-01-10 06:40:26,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:26,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916385422] [2022-01-10 06:40:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:26,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:26,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:26,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:40:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:40:26,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:40:26,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:40:27,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916385422] [2022-01-10 06:40:27,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916385422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:27,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:27,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-01-10 06:40:27,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727388006] [2022-01-10 06:40:27,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:27,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:40:27,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:40:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:40:27,091 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:40:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:27,259 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-01-10 06:40:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:40:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 49 [2022-01-10 06:40:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:27,263 INFO L225 Difference]: With dead ends: 148 [2022-01-10 06:40:27,263 INFO L226 Difference]: Without dead ends: 85 [2022-01-10 06:40:27,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:40:27,264 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 7 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:27,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 562 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:40:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-10 06:40:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-01-10 06:40:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 22 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (27), 22 states have call predecessors, (27), 22 states have call successors, (27) [2022-01-10 06:40:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2022-01-10 06:40:27,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 49 [2022-01-10 06:40:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:27,284 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2022-01-10 06:40:27,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:40:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2022-01-10 06:40:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:40:27,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:27,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:27,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:27,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:27,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash 560170657, now seen corresponding path program 1 times [2022-01-10 06:40:27,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:27,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603580424] [2022-01-10 06:40:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:27,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:27,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:27,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:40:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:40:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:40:27,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:27,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603580424] [2022-01-10 06:40:27,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603580424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:27,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:27,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:40:27,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560625705] [2022-01-10 06:40:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:40:27,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:40:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:40:27,777 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:40:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:27,933 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-01-10 06:40:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:40:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 59 [2022-01-10 06:40:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:27,937 INFO L225 Difference]: With dead ends: 148 [2022-01-10 06:40:27,938 INFO L226 Difference]: Without dead ends: 87 [2022-01-10 06:40:27,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:40:27,939 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 45 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:27,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 600 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:40:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-10 06:40:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-01-10 06:40:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (29), 22 states have call predecessors, (29), 22 states have call successors, (29) [2022-01-10 06:40:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2022-01-10 06:40:27,956 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 59 [2022-01-10 06:40:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:27,956 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2022-01-10 06:40:27,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 06:40:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2022-01-10 06:40:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:40:27,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:27,960 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:27,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:28,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:28,173 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash -83373148, now seen corresponding path program 1 times [2022-01-10 06:40:28,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744184889] [2022-01-10 06:40:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:28,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:28,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:28,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:28,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:40:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:40:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 06:40:28,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:40:31,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:31,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744184889] [2022-01-10 06:40:31,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744184889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:31,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-01-10 06:40:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54772595] [2022-01-10 06:40:31,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:31,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:40:31,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:40:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2022-01-10 06:40:31,092 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 15 states have internal predecessors, (53), 6 states have call successors, (15), 2 states have call predecessors, (15), 9 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-10 06:40:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:31,496 INFO L93 Difference]: Finished difference Result 208 states and 296 transitions. [2022-01-10 06:40:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:40:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 15 states have internal predecessors, (53), 6 states have call successors, (15), 2 states have call predecessors, (15), 9 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 72 [2022-01-10 06:40:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:31,498 INFO L225 Difference]: With dead ends: 208 [2022-01-10 06:40:31,498 INFO L226 Difference]: Without dead ends: 153 [2022-01-10 06:40:31,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2022-01-10 06:40:31,500 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 40 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:31,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1542 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-01-10 06:40:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-10 06:40:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2022-01-10 06:40:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 75 states have internal predecessors, (81), 31 states have call successors, (31), 7 states have call predecessors, (31), 13 states have return successors, (57), 33 states have call predecessors, (57), 31 states have call successors, (57) [2022-01-10 06:40:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 169 transitions. [2022-01-10 06:40:31,513 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 169 transitions. Word has length 72 [2022-01-10 06:40:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:31,513 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 169 transitions. [2022-01-10 06:40:31,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 15 states have internal predecessors, (53), 6 states have call successors, (15), 2 states have call predecessors, (15), 9 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-10 06:40:31,514 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 169 transitions. [2022-01-10 06:40:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:40:31,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:31,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:31,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:31,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:31,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:31,725 INFO L85 PathProgramCache]: Analyzing trace with hash 349596972, now seen corresponding path program 1 times [2022-01-10 06:40:31,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:31,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785100893] [2022-01-10 06:40:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:31,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:31,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:31,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:40:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:40:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 06:40:32,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 06:40:37,791 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:37,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785100893] [2022-01-10 06:40:37,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785100893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:37,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:37,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-01-10 06:40:37,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496498087] [2022-01-10 06:40:37,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:37,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:40:37,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:40:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2022-01-10 06:40:37,793 INFO L87 Difference]: Start difference. First operand 116 states and 169 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (15), 2 states have call predecessors, (15), 9 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-10 06:40:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:38,310 INFO L93 Difference]: Finished difference Result 209 states and 311 transitions. [2022-01-10 06:40:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 06:40:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (15), 2 states have call predecessors, (15), 9 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2022-01-10 06:40:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:38,312 INFO L225 Difference]: With dead ends: 209 [2022-01-10 06:40:38,312 INFO L226 Difference]: Without dead ends: 141 [2022-01-10 06:40:38,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2022-01-10 06:40:38,313 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 23 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:38,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1313 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-01-10 06:40:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-10 06:40:38,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2022-01-10 06:40:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.162162162162162) internal successors, (86), 79 states have internal predecessors, (86), 31 states have call successors, (31), 7 states have call predecessors, (31), 14 states have return successors, (60), 33 states have call predecessors, (60), 31 states have call successors, (60) [2022-01-10 06:40:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 177 transitions. [2022-01-10 06:40:38,325 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 177 transitions. Word has length 73 [2022-01-10 06:40:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:38,325 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 177 transitions. [2022-01-10 06:40:38,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 17 states have internal predecessors, (55), 6 states have call successors, (15), 2 states have call predecessors, (15), 9 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-10 06:40:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 177 transitions. [2022-01-10 06:40:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:40:38,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:38,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:38,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:40:38,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:38,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:38,537 INFO L85 PathProgramCache]: Analyzing trace with hash 359226412, now seen corresponding path program 2 times [2022-01-10 06:40:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:38,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78913049] [2022-01-10 06:40:38,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:40:38,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:38,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:38,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:38,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:40:38,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:40:38,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:40:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:40:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 06:40:38,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:40:38,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:38,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78913049] [2022-01-10 06:40:38,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78913049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:40:38,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:40:38,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:40:38,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228936523] [2022-01-10 06:40:38,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:40:38,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:40:38,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:40:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:40:38,828 INFO L87 Difference]: Start difference. First operand 120 states and 177 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:40:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:39,077 INFO L93 Difference]: Finished difference Result 202 states and 301 transitions. [2022-01-10 06:40:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:40:39,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 75 [2022-01-10 06:40:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:39,079 INFO L225 Difference]: With dead ends: 202 [2022-01-10 06:40:39,079 INFO L226 Difference]: Without dead ends: 122 [2022-01-10 06:40:39,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:40:39,080 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 36 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:39,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 597 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:40:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-10 06:40:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-01-10 06:40:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.16) internal successors, (87), 81 states have internal predecessors, (87), 31 states have call successors, (31), 7 states have call predecessors, (31), 15 states have return successors, (62), 33 states have call predecessors, (62), 31 states have call successors, (62) [2022-01-10 06:40:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 180 transitions. [2022-01-10 06:40:39,091 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 180 transitions. Word has length 75 [2022-01-10 06:40:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:39,091 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 180 transitions. [2022-01-10 06:40:39,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:40:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 180 transitions. [2022-01-10 06:40:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:40:39,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:39,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:39,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:39,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:39,305 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1720245887, now seen corresponding path program 1 times [2022-01-10 06:40:39,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038522683] [2022-01-10 06:40:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:39,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:39,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:39,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:39,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:40:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:39,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:40:39,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-10 06:40:39,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 06:40:42,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038522683] [2022-01-10 06:40:42,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038522683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:40:42,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:40:42,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-01-10 06:40:42,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245532282] [2022-01-10 06:40:42,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:40:42,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:40:42,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:40:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:40:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=522, Unknown=1, NotChecked=0, Total=600 [2022-01-10 06:40:42,892 INFO L87 Difference]: Start difference. First operand 122 states and 180 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 21 states have internal predecessors, (65), 6 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-01-10 06:40:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:40:43,758 INFO L93 Difference]: Finished difference Result 238 states and 350 transitions. [2022-01-10 06:40:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:40:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 21 states have internal predecessors, (65), 6 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 87 [2022-01-10 06:40:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:40:43,759 INFO L225 Difference]: With dead ends: 238 [2022-01-10 06:40:43,759 INFO L226 Difference]: Without dead ends: 164 [2022-01-10 06:40:43,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=125, Invalid=804, Unknown=1, NotChecked=0, Total=930 [2022-01-10 06:40:43,760 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 42 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:40:43,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 2314 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 322 Invalid, 0 Unknown, 64 Unchecked, 0.6s Time] [2022-01-10 06:40:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-10 06:40:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2022-01-10 06:40:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 80 states have internal predecessors, (88), 31 states have call successors, (31), 7 states have call predecessors, (31), 14 states have return successors, (59), 33 states have call predecessors, (59), 31 states have call successors, (59) [2022-01-10 06:40:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 178 transitions. [2022-01-10 06:40:43,770 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 178 transitions. Word has length 87 [2022-01-10 06:40:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:40:43,770 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 178 transitions. [2022-01-10 06:40:43,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 21 states have internal predecessors, (65), 6 states have call successors, (19), 2 states have call predecessors, (19), 9 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2022-01-10 06:40:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 178 transitions. [2022-01-10 06:40:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-10 06:40:43,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:40:43,774 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:40:43,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:40:43,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:40:43,984 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:40:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:40:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 80230615, now seen corresponding path program 1 times [2022-01-10 06:40:43,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:40:43,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574449237] [2022-01-10 06:40:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:43,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:40:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:40:43,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:40:43,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:40:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 06:40:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:44,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:40:44,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:40:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-10 06:40:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:45,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:40:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574449237] [2022-01-10 06:40:45,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574449237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:40:45,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [478141670] [2022-01-10 06:40:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:40:45,958 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:40:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:40:45,959 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:40:45,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-01-10 06:40:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:40:46,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:40:46,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:40:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-01-10 06:40:46,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:40:49,620 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_size_#t~ret27_BEFORE_CALL_10| (_ BitVec 32))) (or (bvult (_ bv0 64) (bvmul ((_ sign_extend 32) (bvadd |c_size_#res| |v_size_#t~ret27_BEFORE_CALL_10| (_ bv1 32))) (_ bv4 64))) (not (bvult (_ bv0 64) (bvmul (_ bv4 64) ((_ sign_extend 32) (bvadd (_ bv3 32) |v_size_#t~ret27_BEFORE_CALL_10|))))))) is different from false [2022-01-10 06:41:27,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [478141670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:27,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:27,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2022-01-10 06:41:27,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2185313] [2022-01-10 06:41:27,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:27,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:41:27,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:41:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1140, Unknown=15, NotChecked=68, Total=1332 [2022-01-10 06:41:27,600 INFO L87 Difference]: Start difference. First operand 121 states and 178 transitions. Second operand has 24 states, 23 states have (on average 3.391304347826087) internal successors, (78), 18 states have internal predecessors, (78), 9 states have call successors, (25), 3 states have call predecessors, (25), 12 states have return successors, (28), 14 states have call predecessors, (28), 9 states have call successors, (28) [2022-01-10 06:41:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:29,478 INFO L93 Difference]: Finished difference Result 296 states and 465 transitions. [2022-01-10 06:41:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 06:41:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.391304347826087) internal successors, (78), 18 states have internal predecessors, (78), 9 states have call successors, (25), 3 states have call predecessors, (25), 12 states have return successors, (28), 14 states have call predecessors, (28), 9 states have call successors, (28) Word has length 108 [2022-01-10 06:41:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:29,480 INFO L225 Difference]: With dead ends: 296 [2022-01-10 06:41:29,481 INFO L226 Difference]: Without dead ends: 203 [2022-01-10 06:41:29,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=234, Invalid=2205, Unknown=15, NotChecked=96, Total=2550 [2022-01-10 06:41:29,482 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 21 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:29,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 2412 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-01-10 06:41:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-10 06:41:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 187. [2022-01-10 06:41:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 123 states have internal predecessors, (132), 46 states have call successors, (46), 9 states have call predecessors, (46), 25 states have return successors, (120), 54 states have call predecessors, (120), 46 states have call successors, (120) [2022-01-10 06:41:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 298 transitions. [2022-01-10 06:41:29,494 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 298 transitions. Word has length 108 [2022-01-10 06:41:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 298 transitions. [2022-01-10 06:41:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.391304347826087) internal successors, (78), 18 states have internal predecessors, (78), 9 states have call successors, (25), 3 states have call predecessors, (25), 12 states have return successors, (28), 14 states have call predecessors, (28), 9 states have call successors, (28) [2022-01-10 06:41:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 298 transitions. [2022-01-10 06:41:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 06:41:29,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:29,496 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:29,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 06:41:29,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-01-10 06:41:29,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 06:41:29,911 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1173158921, now seen corresponding path program 2 times [2022-01-10 06:41:29,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:29,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501372341] [2022-01-10 06:41:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:41:29,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:29,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:29,912 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:41:29,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:41:30,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:41:30,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-01-10 06:41:30,453 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 06:41:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 06:41:30,937 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-01-10 06:41:30,937 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 06:41:30,937 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 06:41:30,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:31,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:41:31,154 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2022-01-10 06:41:31,157 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 06:41:31,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:41:31 BoogieIcfgContainer [2022-01-10 06:41:31,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 06:41:31,204 INFO L158 Benchmark]: Toolchain (without parser) took 66050.56ms. Allocated memory was 207.6MB in the beginning and 260.0MB in the end (delta: 52.4MB). Free memory was 157.3MB in the beginning and 168.3MB in the end (delta: -11.0MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2022-01-10 06:41:31,204 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory was 174.1MB in the beginning and 174.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:41:31,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.13ms. Allocated memory is still 207.6MB. Free memory was 157.2MB in the beginning and 179.8MB in the end (delta: -22.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-10 06:41:31,205 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.96ms. Allocated memory is still 207.6MB. Free memory was 179.8MB in the beginning and 178.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 06:41:31,205 INFO L158 Benchmark]: Boogie Preprocessor took 37.56ms. Allocated memory is still 207.6MB. Free memory was 178.2MB in the beginning and 176.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 06:41:31,205 INFO L158 Benchmark]: RCFGBuilder took 475.22ms. Allocated memory is still 207.6MB. Free memory was 176.2MB in the beginning and 155.7MB in the end (delta: 20.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-01-10 06:41:31,205 INFO L158 Benchmark]: TraceAbstraction took 65277.86ms. Allocated memory was 207.6MB in the beginning and 260.0MB in the end (delta: 52.4MB). Free memory was 155.2MB in the beginning and 168.3MB in the end (delta: -13.1MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. [2022-01-10 06:41:31,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 207.6MB. Free memory was 174.1MB in the beginning and 174.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 218.13ms. Allocated memory is still 207.6MB. Free memory was 157.2MB in the beginning and 179.8MB in the end (delta: -22.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.96ms. Allocated memory is still 207.6MB. Free memory was 179.8MB in the beginning and 178.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.56ms. Allocated memory is still 207.6MB. Free memory was 178.2MB in the beginning and 176.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 475.22ms. Allocated memory is still 207.6MB. Free memory was 176.2MB in the beginning and 155.7MB in the end (delta: 20.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 65277.86ms. Allocated memory was 207.6MB in the beginning and 260.0MB in the end (delta: 52.4MB). Free memory was 155.2MB in the beginning and 168.3MB in the end (delta: -13.1MB). Peak memory consumption was 39.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L102] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [n={5:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [n={5:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={5:0}, n={5:0}] [L102] RET, EXPR nondet_tree() VAL [nondet_tree()={5:0}] [L102] CALL task(nondet_tree()) [L78] CALL, EXPR min(t) VAL [n={5:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={5:0}, n={5:0}, n->left={0:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, min(n->left)=2147483647, n={5:0}, n={5:0}, n->left={0:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={5:0}, n={5:0}, n->right={0:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, min(n->right)=2147483647, n={5:0}, n={5:0}, n->right={0:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={5:0}, n={5:0}] [L78] RET, EXPR min(t) VAL [min(t)=2147483647, t={5:0}, t={5:0}] [L78] int a = min(t); [L79] int b; VAL [a=2147483647, b={7:0}, t={5:0}, t={5:0}] [L81] CALL, EXPR size(t) VAL [t={5:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={5:0}, t={5:0}, t->left={0:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [size(t->left)=0, t={5:0}, t={5:0}, t->left={0:0}] [L74] EXPR t->right VAL [size(t->left)=0, t={5:0}, t={5:0}, t->left={0:0}, t->right={0:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={5:0}, t={5:0}, t->left={0:0}, t->right={0:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) VAL [a=2147483647, b={7:0}, size(t)=1, t={5:0}, t={5:0}] [L81] int n = size(t); [L82] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L82] RET assume_cycle_if_not(n != 0) [L83] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={7:0}, calloc(n, sizeof(int))={4:0}, n=1, t={5:0}, t={5:0}] [L83] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={7:0}, calloc(n, sizeof(int))={4:0}, n=1, t={5:0}, t={5:0}, x={4:0}] [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={4:0}, t={5:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={4:0}, a={4:0}, i=1, t={5:0}, t={5:0}, t->left={0:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={4:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={4:0}, a={4:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={4:0}, a={4:0}, i=1, t={5:0}, t={5:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(i)=1, a={4:0}, a={4:0}, i=2, t={5:0}, t={5:0}, t->right={0:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={4:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={4:0}, a={4:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={4:0}, a={4:0}, i=2, t={5:0}, t={5:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={4:0}, a={4:0}, i=2, t={5:0}, t={5:0}] [L84] RET tree_inorder(t, x, n) VAL [a=2147483647, b={7:0}, calloc(n, sizeof(int))={4:0}, n=1, t={5:0}, t={5:0}, tree_inorder(t, x, n)=2, x={4:0}] [L85] EXPR x[0] VAL [a=2147483647, b={7:0}, calloc(n, sizeof(int))={4:0}, n=1, t={5:0}, t={5:0}, x={4:0}, x[0]=0] [L85] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 65.2s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 316 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 216 mSDsluCounter, 9771 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 267 IncrementalHoareTripleChecker+Unchecked, 8826 mSDsCounter, 86 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 984 IncrementalHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 86 mSolverCounterUnsat, 945 mSDtfsCounter, 984 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1056 GetRequests, 904 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 54.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=8, InterpolantAutomatonStates: 121, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 117 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 56.3s InterpolantComputationTime, 756 NumberOfCodeBlocks, 756 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 936 ConstructedInterpolants, 76 QuantifiedInterpolants, 3352 SizeOfPredicates, 38 NumberOfNonLiveVariables, 2414 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 480/578 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-01-10 06:41:31,413 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-01-10 06:41:31,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...