/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:57:13,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:57:13,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:57:13,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:57:13,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:57:13,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:57:13,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:57:13,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:57:13,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:57:13,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:57:13,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:57:13,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:57:13,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:57:13,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:57:13,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:57:13,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:57:13,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:57:13,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:57:13,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:57:13,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:57:13,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:57:13,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:57:13,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:57:13,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:57:13,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:57:13,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:57:13,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:57:13,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:57:13,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:57:13,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:57:13,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:57:13,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:57:13,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:57:13,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:57:13,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:57:13,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:57:13,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:57:13,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:57:13,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:57:13,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:57:13,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:57:13,840 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:57:13,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:57:13,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:57:13,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:57:13,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:57:13,844 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:57:13,844 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:57:13,844 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:57:13,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:57:13,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:57:13,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:57:13,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:57:13,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:57:13,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:57:13,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:13,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:57:13,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:57:13,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:57:13,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:57:13,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:57:13,849 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:57:14,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:57:14,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:57:14,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:57:14,436 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:57:14,437 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:57:14,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c [2020-12-23 16:57:14,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ca6a52d9b/776c54aa3b7c415fabfa42ead7a8509d/FLAG5252c67b0 [2020-12-23 16:57:15,063 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:57:15,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c [2020-12-23 16:57:15,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ca6a52d9b/776c54aa3b7c415fabfa42ead7a8509d/FLAG5252c67b0 [2020-12-23 16:57:15,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ca6a52d9b/776c54aa3b7c415fabfa42ead7a8509d [2020-12-23 16:57:15,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:57:15,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:57:15,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:15,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:57:15,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:57:15,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271f85df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15, skipping insertion in model container [2020-12-23 16:57:15,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:57:15,490 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 16:57:15,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:15,643 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 16:57:15,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:15,684 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:57:15,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15 WrapperNode [2020-12-23 16:57:15,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:15,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:15,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:57:15,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:57:15,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:15,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:57:15,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:57:15,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:57:15,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... [2020-12-23 16:57:15,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:57:15,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:57:15,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:57:15,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:57:15,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 16:57:15,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:57:15,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:57:15,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:57:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:57:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:57:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:57:16,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:57:16,313 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 16:57:16,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:16 BoogieIcfgContainer [2020-12-23 16:57:16,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:57:16,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:57:16,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:57:16,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:57:16,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:57:15" (1/3) ... [2020-12-23 16:57:16,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc1a382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:16, skipping insertion in model container [2020-12-23 16:57:16,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:15" (2/3) ... [2020-12-23 16:57:16,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc1a382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:16, skipping insertion in model container [2020-12-23 16:57:16,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:16" (3/3) ... [2020-12-23 16:57:16,341 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays03-ValueRestictsIndex-2.c [2020-12-23 16:57:16,364 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:57:16,378 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-23 16:57:16,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-23 16:57:16,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:57:16,487 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:57:16,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:57:16,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:57:16,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:57:16,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:57:16,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:57:16,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:57:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 16:57:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 16:57:16,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:16,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 16:57:16,516 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2020-12-23 16:57:16,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:16,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642887530] [2020-12-23 16:57:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642887530] [2020-12-23 16:57:16,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:16,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:16,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137249106] [2020-12-23 16:57:16,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:16,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:16,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:16,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:16,782 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-12-23 16:57:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:16,879 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 16:57:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:16,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 16:57:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:16,893 INFO L225 Difference]: With dead ends: 22 [2020-12-23 16:57:16,894 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 16:57:16,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 16:57:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 16:57:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 16:57:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-23 16:57:16,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 4 [2020-12-23 16:57:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:16,959 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-23 16:57:16,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-23 16:57:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 16:57:16,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:16,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 16:57:16,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:57:16,962 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2020-12-23 16:57:16,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:16,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056908064] [2020-12-23 16:57:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:17,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056908064] [2020-12-23 16:57:17,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:17,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:17,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566312026] [2020-12-23 16:57:17,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:17,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:17,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:17,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:17,058 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2020-12-23 16:57:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:17,089 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-23 16:57:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:17,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 16:57:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:17,091 INFO L225 Difference]: With dead ends: 24 [2020-12-23 16:57:17,091 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 16:57:17,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 16:57:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-23 16:57:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 16:57:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-23 16:57:17,097 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-12-23 16:57:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:17,097 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-23 16:57:17,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-23 16:57:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:57:17,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:17,098 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:17,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:57:17,099 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2020-12-23 16:57:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:17,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687858054] [2020-12-23 16:57:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:17,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687858054] [2020-12-23 16:57:17,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872669418] [2020-12-23 16:57:17,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 16:57:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:57:17,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:17,404 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 [2020-12-23 16:57:17,405 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:17,414 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:17,416 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:17,416 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-23 16:57:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:17,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:17,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-12-23 16:57:17,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958393225] [2020-12-23 16:57:17,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:57:17,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:17,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:57:17,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:57:17,457 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-12-23 16:57:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:17,523 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-23 16:57:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:17,524 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 16:57:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:17,525 INFO L225 Difference]: With dead ends: 27 [2020-12-23 16:57:17,525 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:57:17,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:57:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:57:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 16:57:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:57:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 16:57:17,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2020-12-23 16:57:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:17,532 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 16:57:17,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:57:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 16:57:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:57:17,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:17,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:17,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 16:57:17,748 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:17,751 INFO L82 PathProgramCache]: Analyzing trace with hash 502867326, now seen corresponding path program 1 times [2020-12-23 16:57:17,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:17,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699172799] [2020-12-23 16:57:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:17,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699172799] [2020-12-23 16:57:17,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980273123] [2020-12-23 16:57:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 16:57:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:17,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:17,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 16:57:17,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141481364] [2020-12-23 16:57:17,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:57:17,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:57:17,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:17,953 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-12-23 16:57:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:17,985 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 16:57:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:17,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 16:57:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:17,986 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:57:17,987 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:57:17,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:57:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-23 16:57:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:57:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 16:57:17,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 18 [2020-12-23 16:57:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:17,993 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 16:57:17,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:57:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 16:57:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:57:17,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:17,994 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:18,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:18,208 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1080337215, now seen corresponding path program 2 times [2020-12-23 16:57:18,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:18,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91526879] [2020-12-23 16:57:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91526879] [2020-12-23 16:57:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533856837] [2020-12-23 16:57:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:18,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:18,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 16:57:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:57:18,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:18,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-23 16:57:18,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052467819] [2020-12-23 16:57:18,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:18,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:18,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:18,482 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-12-23 16:57:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:18,505 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-23 16:57:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:18,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-23 16:57:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:18,507 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:57:18,507 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 16:57:18,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:57:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 16:57:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 16:57:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:57:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 16:57:18,511 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-23 16:57:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:18,512 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 16:57:18,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 16:57:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:57:18,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:18,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:18,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:18,728 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:57:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:18,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1145547875, now seen corresponding path program 1 times [2020-12-23 16:57:18,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:18,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97561595] [2020-12-23 16:57:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:57:18,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97561595] [2020-12-23 16:57:18,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:18,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:18,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510894917] [2020-12-23 16:57:18,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:18,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:18,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:18,804 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 4 states. [2020-12-23 16:57:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:18,811 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 16:57:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:18,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-12-23 16:57:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:18,812 INFO L225 Difference]: With dead ends: 24 [2020-12-23 16:57:18,813 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 16:57:18,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 16:57:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 16:57:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 16:57:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 16:57:18,814 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-12-23 16:57:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:18,814 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 16:57:18,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 16:57:18,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 16:57:18,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:57:18,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:57:18 BoogieIcfgContainer [2020-12-23 16:57:18,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:57:18,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:57:18,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:57:18,822 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:57:18,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:16" (3/4) ... [2020-12-23 16:57:18,827 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 16:57:18,838 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-23 16:57:18,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-23 16:57:18,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 16:57:18,889 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c-witness.graphml [2020-12-23 16:57:18,889 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:57:18,891 INFO L168 Benchmark]: Toolchain (without parser) took 3451.20 ms. Allocated memory was 154.1 MB in the beginning and 188.7 MB in the end (delta: 34.6 MB). Free memory was 111.3 MB in the beginning and 96.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,891 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 127.4 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:57:18,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.03 ms. Allocated memory is still 154.1 MB. Free memory was 111.2 MB in the beginning and 129.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,893 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.29 ms. Allocated memory is still 154.1 MB. Free memory was 129.4 MB in the beginning and 128.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,893 INFO L168 Benchmark]: Boogie Preprocessor took 51.87 ms. Allocated memory is still 154.1 MB. Free memory was 128.0 MB in the beginning and 137.3 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,894 INFO L168 Benchmark]: RCFGBuilder took 538.91 ms. Allocated memory is still 154.1 MB. Free memory was 137.3 MB in the beginning and 122.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,899 INFO L168 Benchmark]: TraceAbstraction took 2496.12 ms. Allocated memory was 154.1 MB in the beginning and 188.7 MB in the end (delta: 34.6 MB). Free memory was 122.1 MB in the beginning and 98.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,900 INFO L168 Benchmark]: Witness Printer took 67.88 ms. Allocated memory is still 188.7 MB. Free memory was 98.7 MB in the beginning and 96.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:57:18,903 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 127.4 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 242.03 ms. Allocated memory is still 154.1 MB. Free memory was 111.2 MB in the beginning and 129.4 MB in the end (delta: -18.2 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.29 ms. Allocated memory is still 154.1 MB. Free memory was 129.4 MB in the beginning and 128.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.87 ms. Allocated memory is still 154.1 MB. Free memory was 128.0 MB in the beginning and 137.3 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 538.91 ms. Allocated memory is still 154.1 MB. Free memory was 137.3 MB in the beginning and 122.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2496.12 ms. Allocated memory was 154.1 MB in the beginning and 188.7 MB in the end (delta: 34.6 MB). Free memory was 122.1 MB in the beginning and 98.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB. * Witness Printer took 67.88 ms. Allocated memory is still 188.7 MB. Free memory was 98.7 MB in the beginning and 96.6 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: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 72 SDslu, 93 SDs, 0 SdLazy, 97 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, 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, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 128 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 119 ConstructedInterpolants, 1 QuantifiedInterpolants, 13979 SizeOfPredicates, 0 NumberOfNonLiveVariables, 123 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 56/118 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 correct! Received shutdown request...