/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:58:42,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:58:42,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:58:42,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:58:42,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:58:42,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:58:42,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:58:42,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:58:42,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:58:42,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:58:42,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:58:42,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:58:42,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:58:42,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:58:42,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:58:42,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:58:42,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:58:42,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:58:42,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:58:42,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:58:42,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:58:42,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:58:42,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:58:42,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:58:42,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:58:42,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 03:58:42,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 03:58:42,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 03:58:42,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 03:58:42,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 03:58:42,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 03:58:42,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 03:58:42,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 03:58:42,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:58:42,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:58:42,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:58:42,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:58:42,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:58:42,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:58:42,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:58:42,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:58:42,737 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:58:42,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:58:42,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:58:42,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:58:42,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:58:42,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:58:42,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:58:42,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:58:42,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:58:42,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:58:42,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:58:42,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:58:42,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:58:42,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:58:42,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:58:42,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:58:42,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:58:42,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:58:42,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:58:42,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:58:42,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:58:42,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:58:43,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:58:43,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:58:43,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:58:43,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:58:43,186 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:58:43,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2020-12-22 03:58:43,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883579365/009ed2e7a3b84249af746e34ed3c9935/FLAG18695b143 [2020-12-22 03:58:44,002 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:58:44,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2020-12-22 03:58:44,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883579365/009ed2e7a3b84249af746e34ed3c9935/FLAG18695b143 [2020-12-22 03:58:44,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883579365/009ed2e7a3b84249af746e34ed3c9935 [2020-12-22 03:58:44,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:58:44,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:58:44,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:58:44,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:58:44,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:58:44,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:44,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f82af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44, skipping insertion in model container [2020-12-22 03:58:44,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:44,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:58:44,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:58:44,770 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2020-12-22 03:58:44,790 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2020-12-22 03:58:44,792 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2020-12-22 03:58:44,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:58:44,808 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:58:44,847 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2020-12-22 03:58:44,848 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2020-12-22 03:58:44,850 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2020-12-22 03:58:44,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:58:44,926 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:58:44,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44 WrapperNode [2020-12-22 03:58:44,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:58:44,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:58:44,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:58:44,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:58:44,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:44,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:58:45,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:58:45,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:58:45,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:58:45,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... [2020-12-22 03:58:45,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:58:45,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:58:45,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:58:45,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:58:45,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:58:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:58:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:58:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 03:58:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:58:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:58:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:58:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:58:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:58:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:58:45,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:58:45,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:58:45,725 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 03:58:45,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:58:45 BoogieIcfgContainer [2020-12-22 03:58:45,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:58:45,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:58:45,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:58:45,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:58:45,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:58:44" (1/3) ... [2020-12-22 03:58:45,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a29d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:58:45, skipping insertion in model container [2020-12-22 03:58:45,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:58:44" (2/3) ... [2020-12-22 03:58:45,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a29d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:58:45, skipping insertion in model container [2020-12-22 03:58:45,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:58:45" (3/3) ... [2020-12-22 03:58:45,736 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2020-12-22 03:58:45,743 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:58:45,748 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 03:58:45,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 03:58:45,795 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:58:45,795 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:58:45,796 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:58:45,796 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:58:45,796 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:58:45,796 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:58:45,796 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:58:45,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:58:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-22 03:58:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:58:45,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:58:45,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:58:45,821 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:58:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:58:45,828 INFO L82 PathProgramCache]: Analyzing trace with hash 889968582, now seen corresponding path program 1 times [2020-12-22 03:58:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:58:45,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776213625] [2020-12-22 03:58:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:58:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:58:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:58:46,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776213625] [2020-12-22 03:58:46,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:58:46,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:58:46,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860220755] [2020-12-22 03:58:46,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:58:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:58:46,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:58:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:58:46,047 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-12-22 03:58:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:58:46,069 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2020-12-22 03:58:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:58:46,070 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 03:58:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:58:46,081 INFO L225 Difference]: With dead ends: 53 [2020-12-22 03:58:46,082 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:58:46,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:58:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:58:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 03:58:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 03:58:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-22 03:58:46,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2020-12-22 03:58:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:58:46,128 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-22 03:58:46,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:58:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-22 03:58:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 03:58:46,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:58:46,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:58:46,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:58:46,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:58:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:58:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1806853233, now seen corresponding path program 1 times [2020-12-22 03:58:46,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:58:46,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880375503] [2020-12-22 03:58:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:58:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:58:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:58:46,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880375503] [2020-12-22 03:58:46,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:58:46,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 03:58:46,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250161311] [2020-12-22 03:58:46,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:58:46,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:58:46,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:58:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:58:46,214 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-12-22 03:58:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:58:46,280 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-12-22 03:58:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:58:46,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 03:58:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:58:46,282 INFO L225 Difference]: With dead ends: 31 [2020-12-22 03:58:46,282 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 03:58:46,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:58:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 03:58:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-22 03:58:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 03:58:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-22 03:58:46,289 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2020-12-22 03:58:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:58:46,289 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-22 03:58:46,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:58:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-22 03:58:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:58:46,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:58:46,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:58:46,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:58:46,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:58:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:58:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash -856511048, now seen corresponding path program 1 times [2020-12-22 03:58:46,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:58:46,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150773354] [2020-12-22 03:58:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:58:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:58:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:58:46,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150773354] [2020-12-22 03:58:46,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:58:46,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:58:46,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76684656] [2020-12-22 03:58:46,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:58:46,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:58:46,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:58:46,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:58:46,392 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-12-22 03:58:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:58:46,511 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-12-22 03:58:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:58:46,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 03:58:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:58:46,514 INFO L225 Difference]: With dead ends: 47 [2020-12-22 03:58:46,514 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 03:58:46,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:58:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 03:58:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2020-12-22 03:58:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 03:58:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-22 03:58:46,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2020-12-22 03:58:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:58:46,524 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-22 03:58:46,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:58:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-22 03:58:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:58:46,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:58:46,527 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:58:46,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:58:46,528 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:58:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:58:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1594081566, now seen corresponding path program 1 times [2020-12-22 03:58:46,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:58:46,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039747186] [2020-12-22 03:58:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:58:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:58:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:58:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039747186] [2020-12-22 03:58:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831893233] [2020-12-22 03:58:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:58:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:58:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 03:58:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:58:47,002 INFO L382 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 6 treesize of output 5 [2020-12-22 03:58:47,003 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,013 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,019 INFO L382 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 [2020-12-22 03:58:47,020 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,028 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,029 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,030 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2020-12-22 03:58:47,116 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,117 INFO L382 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-12-22 03:58:47,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:58:47,128 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,160 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:58:47,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:58:47,196 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2020-12-22 03:58:47,201 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,213 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,220 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:24 [2020-12-22 03:58:47,304 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-12-22 03:58:47,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 03:58:47,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 03:58:47,313 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,350 INFO L443 ElimStorePlain]: Different costs {2=[|v_#memory_int_24|, |v_#memory_int_25|], 4=[|v_#memory_int_27|]} [2020-12-22 03:58:47,359 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:58:47,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,388 INFO L547 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 03:58:47,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 03:58:47,438 INFO L348 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2020-12-22 03:58:47,439 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2020-12-22 03:58:47,443 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,487 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 03:58:47,487 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:77, output treesize:40 [2020-12-22 03:58:47,731 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2020-12-22 03:58:47,734 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,741 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:58:47,744 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:58:47,744 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:49, output treesize:3 [2020-12-22 03:58:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:58:47,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:58:47,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-22 03:58:47,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687935691] [2020-12-22 03:58:47,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:58:47,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:58:47,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:58:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:58:47,753 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-12-22 03:58:52,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:58:52,345 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-12-22 03:58:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:58:52,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 03:58:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:58:52,348 INFO L225 Difference]: With dead ends: 60 [2020-12-22 03:58:52,348 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 03:58:52,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:58:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 03:58:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 19. [2020-12-22 03:58:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 03:58:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-22 03:58:52,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2020-12-22 03:58:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:58:52,355 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-22 03:58:52,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:58:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-22 03:58:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:58:52,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:58:52,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:58:52,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:58:52,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:58:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:58:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash -839217458, now seen corresponding path program 1 times [2020-12-22 03:58:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:58:52,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568506213] [2020-12-22 03:58:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:58:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:58:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:58:52,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568506213] [2020-12-22 03:58:52,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:58:52,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:58:52,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213747123] [2020-12-22 03:58:52,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:58:52,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:58:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:58:52,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:58:52,709 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-12-22 03:58:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:58:52,779 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-22 03:58:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:58:52,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 03:58:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:58:52,780 INFO L225 Difference]: With dead ends: 35 [2020-12-22 03:58:52,781 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 03:58:52,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:58:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 03:58:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-12-22 03:58:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 03:58:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-22 03:58:52,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-12-22 03:58:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:58:52,787 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-22 03:58:52,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:58:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-22 03:58:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:58:52,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:58:52,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:58:52,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:58:52,804 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:58:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:58:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash -839157876, now seen corresponding path program 1 times [2020-12-22 03:58:52,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:58:52,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350544680] [2020-12-22 03:58:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:58:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:58:52,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:58:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:58:52,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:58:52,896 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:58:52,896 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:58:52,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:58:52,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:58:52 BoogieIcfgContainer [2020-12-22 03:58:52,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:58:52,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:58:52,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:58:52,930 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:58:52,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:58:45" (3/4) ... [2020-12-22 03:58:52,933 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:58:52,981 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/forester-heap/sll-rb-cnstr_1-2.i-witness.graphml [2020-12-22 03:58:52,982 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:58:52,983 INFO L168 Benchmark]: Toolchain (without parser) took 8682.75 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 129.1 MB in the beginning and 159.6 MB in the end (delta: -30.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:58:52,984 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:58:52,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 625.26 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 106.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:58:52,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.31 ms. Allocated memory is still 154.1 MB. Free memory was 106.4 MB in the beginning and 138.0 MB in the end (delta: -31.6 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:58:52,986 INFO L168 Benchmark]: Boogie Preprocessor took 36.78 ms. Allocated memory is still 154.1 MB. Free memory was 138.0 MB in the beginning and 136.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:58:52,987 INFO L168 Benchmark]: RCFGBuilder took 685.05 ms. Allocated memory is still 154.1 MB. Free memory was 135.8 MB in the beginning and 113.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:58:52,987 INFO L168 Benchmark]: TraceAbstraction took 7200.17 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 113.7 MB in the beginning and 161.7 MB in the end (delta: -47.9 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:58:52,988 INFO L168 Benchmark]: Witness Printer took 52.42 ms. Allocated memory is still 185.6 MB. Free memory was 161.7 MB in the beginning and 159.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:58:52,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 625.26 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 106.4 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 71.31 ms. Allocated memory is still 154.1 MB. Free memory was 106.4 MB in the beginning and 138.0 MB in the end (delta: -31.6 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.78 ms. Allocated memory is still 154.1 MB. Free memory was 138.0 MB in the beginning and 136.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 685.05 ms. Allocated memory is still 154.1 MB. Free memory was 135.8 MB in the beginning and 113.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7200.17 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 113.7 MB in the beginning and 161.7 MB in the end (delta: -47.9 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 52.42 ms. Allocated memory is still 185.6 MB. Free memory was 161.7 MB in the beginning and 159.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1049]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1006] SLL* list = malloc(sizeof(SLL)); [L1007] list->next = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1034] end = ((void*)0) [L1035] end = list [L1038] COND FALSE !(!(((void*)0) != end)) [L1039] EXPR end->colour [L1039] COND FALSE !(!(BLACK == end->colour)) [L1041] COND TRUE ((void*)0) != end [L1043] EXPR end->colour [L1043] COND FALSE !(RED == end->colour) [L1049] EXPR end->next [L1049] COND TRUE !(end->next) [L1049] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 148 SDslu, 233 SDs, 0 SdLazy, 250 SolverSat, 43 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 58 ConstructedInterpolants, 6 QuantifiedInterpolants, 6912 SizeOfPredicates, 10 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 0/4 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! Received shutdown request...