/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/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:00:39,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:00:39,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:00:39,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:00:39,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:00:39,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:00:39,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:00:39,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:00:39,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:00:39,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:00:39,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:00:39,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:00:39,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:00:39,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:00:39,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:00:39,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:00:39,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:00:39,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:00:39,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:00:39,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:00:39,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:00:39,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:00:39,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:00:39,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:00:39,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:00:39,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:00:39,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:00:39,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:00:39,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:00:39,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:00:39,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:00:39,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:00:39,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:00:39,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:00:39,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:00:39,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:00:39,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:00:39,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:00:39,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:00:39,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:00:39,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:00:39,667 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 06:00:39,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:00:39,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:00:39,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:00:39,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:00:39,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:00:39,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:00:39,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:00:39,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:00:39,690 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:00:39,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:00:39,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:00:39,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:00:39,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:00:39,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:00:39,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:00:39,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:00:39,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:00:39,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:00:39,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:00:39,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:00:39,695 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:00:39,695 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:00:39,695 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:00:39,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:00:39,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:00:39,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:00:39,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:00:39,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:00:39,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:00:39,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:00:39,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:00:39,909 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:00:39,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2022-01-10 06:00:39,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/829972453/e76714b51bb14caa880703fe16c32e6a/FLAG78a0f5ad2 [2022-01-10 06:00:40,359 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:00:40,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2022-01-10 06:00:40,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/829972453/e76714b51bb14caa880703fe16c32e6a/FLAG78a0f5ad2 [2022-01-10 06:00:40,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/829972453/e76714b51bb14caa880703fe16c32e6a [2022-01-10 06:00:40,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:00:40,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:00:40,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:00:40,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:00:40,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:00:40,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8aba78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40, skipping insertion in model container [2022-01-10 06:00:40,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:00:40,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:00:40,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-01-10 06:00:40,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:00:40,743 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:00:40,775 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-01-10 06:00:40,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:00:40,804 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:00:40,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40 WrapperNode [2022-01-10 06:00:40,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:00:40,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:00:40,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:00:40,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:00:40,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,860 INFO L137 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 198 [2022-01-10 06:00:40,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:00:40,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:00:40,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:00:40,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:00:40,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:00:40,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:00:40,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:00:40,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:00:40,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (1/1) ... [2022-01-10 06:00:40,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:00:40,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:00:40,948 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 06:00:40,963 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 06:00:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-01-10 06:00:40,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-01-10 06:00:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:00:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:00:40,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-01-10 06:00:40,981 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-01-10 06:00:40,981 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-01-10 06:00:40,981 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-01-10 06:00:40,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:00:40,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:00:41,116 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:00:41,117 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:00:41,548 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:00:41,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:00:41,553 INFO L299 CfgBuilder]: Removed 33 assume(true) statements. [2022-01-10 06:00:41,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:00:41 BoogieIcfgContainer [2022-01-10 06:00:41,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:00:41,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:00:41,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:00:41,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:00:41,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:00:40" (1/3) ... [2022-01-10 06:00:41,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d129a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:00:41, skipping insertion in model container [2022-01-10 06:00:41,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:00:40" (2/3) ... [2022-01-10 06:00:41,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d129a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:00:41, skipping insertion in model container [2022-01-10 06:00:41,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:00:41" (3/3) ... [2022-01-10 06:00:41,576 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-01-10 06:00:41,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:00:41,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:00:41,625 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:00:41,637 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 06:00:41,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:00:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 80 states have internal predecessors, (123), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 06:00:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:00:41,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:00:41,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:00:41,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:00:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:00:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1113007485, now seen corresponding path program 1 times [2022-01-10 06:00:41,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:00:41,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617440366] [2022-01-10 06:00:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:00:41,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:00:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:00:41,676 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 06:00:41,677 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 06:00:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:00:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:00:41,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:00:41,835 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 06:00:41,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:00:41,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:00:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617440366] [2022-01-10 06:00:41,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617440366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:00:41,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:00:41,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:00:41,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656211549] [2022-01-10 06:00:41,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:00:41,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:00:41,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:00:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:00:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:00:41,863 INFO L87 Difference]: Start difference. First operand has 93 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 80 states have internal predecessors, (123), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:00:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:00:41,902 INFO L93 Difference]: Finished difference Result 182 states and 320 transitions. [2022-01-10 06:00:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:00:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 06:00:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:00:41,911 INFO L225 Difference]: With dead ends: 182 [2022-01-10 06:00:41,911 INFO L226 Difference]: Without dead ends: 85 [2022-01-10 06:00:41,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:00:41,920 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:00:41,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:00:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-10 06:00:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-01-10 06:00:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.25) internal successors, (80), 73 states have internal predecessors, (80), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:00:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2022-01-10 06:00:41,969 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 16 [2022-01-10 06:00:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:00:41,969 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2022-01-10 06:00:41,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:00:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2022-01-10 06:00:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 06:00:41,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:00:41,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:00:41,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:00:42,179 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 06:00:42,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:00:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:00:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash -279005831, now seen corresponding path program 1 times [2022-01-10 06:00:42,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:00:42,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819093687] [2022-01-10 06:00:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:00:42,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:00:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:00:42,182 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 06:00:42,184 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 06:00:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:00:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-10 06:00:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:00:42,761 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:00:42,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:00:42,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 06:00:42,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:00:42,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 06:00:42,892 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:00:42,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-01-10 06:00:42,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-10 06:00:43,127 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 06:00:43,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-10 06:00:43,276 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 06:00:43,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-10 06:00:43,347 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:00:43,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2022-01-10 06:00:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:00:43,914 INFO L353 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2022-01-10 06:00:43,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 90 [2022-01-10 06:00:43,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 06:00:43,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-01-10 06:00:44,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2022-01-10 06:00:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:00:44,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-10 06:00:44,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:00:44,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-10 06:00:44,578 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:00:44,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-01-10 06:00:44,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-01-10 06:00:44,626 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-10 06:00:44,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 50 [2022-01-10 06:00:44,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-10 06:00:45,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:00:45,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 65 [2022-01-10 06:00:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:00:45,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:00:45,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:00:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819093687] [2022-01-10 06:00:45,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819093687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:00:45,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:00:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-10 06:00:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691303922] [2022-01-10 06:00:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:00:45,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:00:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:00:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:00:45,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2022-01-10 06:00:45,933 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:00:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:00:46,631 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2022-01-10 06:00:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:00:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-10 06:00:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:00:46,634 INFO L225 Difference]: With dead ends: 124 [2022-01-10 06:00:46,635 INFO L226 Difference]: Without dead ends: 121 [2022-01-10 06:00:46,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=422, Unknown=4, NotChecked=0, Total=506 [2022-01-10 06:00:46,636 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 34 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:00:46,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 715 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-01-10 06:00:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-10 06:00:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2022-01-10 06:00:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 97 states have internal predecessors, (108), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 06:00:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2022-01-10 06:00:46,646 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 30 [2022-01-10 06:00:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:00:46,647 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2022-01-10 06:00:46,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:00:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2022-01-10 06:00:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 06:00:46,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:00:46,648 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2022-01-10 06:00:46,661 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 06:00:46,857 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 06:00:46,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:00:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:00:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1843686653, now seen corresponding path program 1 times [2022-01-10 06:00:46,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:00:46,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270541484] [2022-01-10 06:00:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:00:46,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:00:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:00:46,864 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 06:00:46,869 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 06:00:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:00:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-10 06:00:47,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:00:47,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-10 06:00:47,296 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:00:47,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:00:47,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 06:00:47,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:00:47,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:00:47,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-01-10 06:00:47,386 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:00:47,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-01-10 06:00:47,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-10 06:00:47,544 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 06:00:47,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-01-10 06:00:47,662 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-01-10 06:00:47,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-01-10 06:00:47,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:00:47,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-10 06:00:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:00:48,169 INFO L353 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2022-01-10 06:00:48,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 83 [2022-01-10 06:00:48,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 06:00:48,302 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-01-10 06:00:48,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 51 [2022-01-10 06:00:48,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-10 06:00:48,527 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:00:48,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2022-01-10 06:00:48,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-01-10 06:00:48,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-01-10 06:00:48,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 06:00:48,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:00:49,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:00:49,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-10 06:00:49,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-10 06:00:49,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2022-01-10 06:00:49,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2022-01-10 06:00:50,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:00:50,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 64 [2022-01-10 06:00:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:00:50,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:00:50,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:00:50,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270541484] [2022-01-10 06:00:50,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270541484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:00:50,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:00:50,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-10 06:00:50,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203258705] [2022-01-10 06:00:50,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:00:50,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:00:50,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:00:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:00:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=254, Unknown=2, NotChecked=0, Total=306 [2022-01-10 06:00:50,730 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:00:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:00:51,349 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2022-01-10 06:00:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:00:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-01-10 06:00:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:00:51,351 INFO L225 Difference]: With dead ends: 120 [2022-01-10 06:00:51,351 INFO L226 Difference]: Without dead ends: 117 [2022-01-10 06:00:51,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=351, Unknown=2, NotChecked=0, Total=420 [2022-01-10 06:00:51,352 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 34 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:00:51,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 915 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 225 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-01-10 06:00:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-10 06:00:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2022-01-10 06:00:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 97 states have internal predecessors, (107), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 06:00:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2022-01-10 06:00:51,363 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 32 [2022-01-10 06:00:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:00:51,363 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2022-01-10 06:00:51,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:00:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2022-01-10 06:00:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:00:51,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:00:51,364 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2022-01-10 06:00:51,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 06:00:51,573 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 06:00:51,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:00:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:00:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1473932625, now seen corresponding path program 1 times [2022-01-10 06:00:51,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:00:51,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909732680] [2022-01-10 06:00:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:00:51,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:00:51,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:00:51,575 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 06:00:51,576 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 06:00:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 06:00:51,879 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 06:00:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 06:00:52,133 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-01-10 06:00:52,133 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 06:00:52,134 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 06:00:52,164 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 06:00:52,335 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 06:00:52,338 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-10 06:00:52,341 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 06:00:52,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:00:52 BoogieIcfgContainer [2022-01-10 06:00:52,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 06:00:52,381 INFO L158 Benchmark]: Toolchain (without parser) took 11997.02ms. Allocated memory was 197.1MB in the beginning and 336.6MB in the end (delta: 139.5MB). Free memory was 138.1MB in the beginning and 289.5MB in the end (delta: -151.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:00:52,381 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 156.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:00:52,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.72ms. Allocated memory was 197.1MB in the beginning and 336.6MB in the end (delta: 139.5MB). Free memory was 137.9MB in the beginning and 301.3MB in the end (delta: -163.4MB). Peak memory consumption was 17.0MB. Max. memory is 8.0GB. [2022-01-10 06:00:52,382 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.21ms. Allocated memory is still 336.6MB. Free memory was 301.3MB in the beginning and 298.6MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-10 06:00:52,382 INFO L158 Benchmark]: Boogie Preprocessor took 53.57ms. Allocated memory is still 336.6MB. Free memory was 298.6MB in the beginning and 296.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 06:00:52,382 INFO L158 Benchmark]: RCFGBuilder took 639.20ms. Allocated memory is still 336.6MB. Free memory was 296.0MB in the beginning and 273.5MB in the end (delta: 22.5MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2022-01-10 06:00:52,382 INFO L158 Benchmark]: TraceAbstraction took 10825.03ms. Allocated memory is still 336.6MB. Free memory was 272.9MB in the beginning and 289.5MB in the end (delta: -16.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:00:52,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 156.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 417.72ms. Allocated memory was 197.1MB in the beginning and 336.6MB in the end (delta: 139.5MB). Free memory was 137.9MB in the beginning and 301.3MB in the end (delta: -163.4MB). Peak memory consumption was 17.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 55.21ms. Allocated memory is still 336.6MB. Free memory was 301.3MB in the beginning and 298.6MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 53.57ms. Allocated memory is still 336.6MB. Free memory was 298.6MB in the beginning and 296.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 639.20ms. Allocated memory is still 336.6MB. Free memory was 296.0MB in the beginning and 273.5MB in the end (delta: 22.5MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 10825.03ms. Allocated memory is still 336.6MB. Free memory was 272.9MB in the beginning and 289.5MB in the end (delta: -16.5MB). There was no memory consumed. 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: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={-2295663180092112302:0}, pp1={-4067266158449226806:0}, pp1={-4067266158449226806:0}, pp2={-3490805415809479718:0}, pp2={-3490805415809479718:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={5165113085176480338:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={5165113085176480338:0}, ptr={5165113085176480338:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={5165113085176480338:0}, ppnode={-2295663180092112302:0}, ppnode={-2295663180092112302:0}] [L590] RET chain_node(&list) VAL [list={-2295663180092112302:0}, pp1={-4067266158449226806:0}, pp1={-4067266158449226806:0}, pp2={-3490805415809479718:0}, pp2={-3490805415809479718:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-4067266159522968630:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={-4067266159522968630:0}, ptr={-4067266159522968630:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={-4067266159522968630:0}, ppnode={-2295663180092112302:0}, ppnode={-2295663180092112302:0}] [L597] RET chain_node(&list) VAL [list={-2295663180092112302:0}, pp1={-4067266158449226806:0}, pp1={-4067266158449226806:0}, pp2={-3490805415809479718:0}, pp2={-3490805415809479718:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; VAL [\result={-4067266159522968630:0}, pp1={-4067266158449226806:0}, pp1={-4067266158449226806:0}, pp2={-3490805415809479718:0}, pp2={-3490805415809479718:0}] [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) VAL [\read(*p1)={5165113085176480338:0}, \read(*p2)={5165113085176480338:0}, list={-4067266159522968630:0}, p1={-4067266158449226806:0}, p2={-3490805415809479718:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={5165113085176480338:0}, end={5165113085176480338:0}] [L626] COND FALSE !(!(beg)) VAL [beg={5165113085176480338:0}, beg={5165113085176480338:0}, end={5165113085176480338:0}, end={5165113085176480338:0}] [L627] COND FALSE !(!(end)) VAL [beg={5165113085176480338:0}, beg={5165113085176480338:0}, end={5165113085176480338:0}, end={5165113085176480338:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={5165113085176480338:0}, beg={0:0}, end={5165113085176480338:0}, end={5165113085176480338:0}] [L629] COND TRUE !(beg) VAL [beg={5165113085176480338:0}, beg={0:0}, end={5165113085176480338:0}, end={5165113085176480338:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 1742 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 108 IncrementalHoareTripleChecker+Unchecked, 1439 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 395 IncrementalHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 303 mSDtfsCounter, 395 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=2, InterpolantAutomatonStates: 30, 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, 3 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 75 ConstructedInterpolants, 16 QuantifiedInterpolants, 1666 SizeOfPredicates, 49 NumberOfNonLiveVariables, 536 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 12/12 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 06:00:52,416 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 0 Received shutdown request...