/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/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:28:23,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:28:23,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:28:23,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:28:23,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:28:23,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:28:23,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:28:23,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:28:23,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:28:23,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:28:23,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:28:23,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:28:23,848 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:28:23,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:28:23,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:28:23,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:28:23,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:28:23,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:28:23,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:28:23,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:28:23,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:28:23,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:28:23,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:28:23,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:28:23,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:28:23,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:28:23,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:28:23,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:28:23,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:28:23,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:28:23,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:28:23,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:28:23,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:28:23,963 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:28:23,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:28:23,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:28:23,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:28:23,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:28:23,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:28:23,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:28:23,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:28:23,965 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:28:23,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:28:23,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:28:23,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:28:23,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:28:23,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:28:23,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:28:23,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:28:23,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:28:23,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:28:23,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:28:23,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:28:23,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:28:23,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:28:24,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:28:24,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:28:24,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:28:24,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:28:24,445 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:28:24,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-12-23 09:28:24,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/626090044/8db6558c8f6e43ca9c934ce0ca020b47/FLAGb4449232b [2020-12-23 09:28:25,131 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:28:25,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-12-23 09:28:25,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/626090044/8db6558c8f6e43ca9c934ce0ca020b47/FLAGb4449232b [2020-12-23 09:28:25,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/626090044/8db6558c8f6e43ca9c934ce0ca020b47 [2020-12-23 09:28:25,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:28:25,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:28:25,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:28:25,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:28:25,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:28:25,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4124d905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25, skipping insertion in model container [2020-12-23 09:28:25,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:28:25,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:28:25,682 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2020-12-23 09:28:25,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:28:25,721 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:28:25,738 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2020-12-23 09:28:25,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:28:25,768 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:28:25,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25 WrapperNode [2020-12-23 09:28:25,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:28:25,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:28:25,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:28:25,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:28:25,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:28:25,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:28:25,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:28:25,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:28:25,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (1/1) ... [2020-12-23 09:28:25,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:28:25,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:28:25,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:28:25,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:28:25,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (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 09:28:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:28:25,983 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-23 09:28:25,983 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-23 09:28:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:28:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 09:28:25,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:28:25,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:28:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 09:28:25,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 09:28:26,425 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:28:26,425 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 09:28:26,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:28:26 BoogieIcfgContainer [2020-12-23 09:28:26,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:28:26,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:28:26,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:28:26,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:28:26,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:28:25" (1/3) ... [2020-12-23 09:28:26,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cf3219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:28:26, skipping insertion in model container [2020-12-23 09:28:26,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:28:25" (2/3) ... [2020-12-23 09:28:26,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cf3219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:28:26, skipping insertion in model container [2020-12-23 09:28:26,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:28:26" (3/3) ... [2020-12-23 09:28:26,437 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-12-23 09:28:26,444 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:28:26,450 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 09:28:26,469 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 09:28:26,498 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:28:26,498 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:28:26,498 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:28:26,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:28:26,499 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:28:26,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:28:26,499 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:28:26,499 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:28:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 09:28:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:28:26,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:26,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:26,528 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1228012135, now seen corresponding path program 1 times [2020-12-23 09:28:26,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:26,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563293734] [2020-12-23 09:28:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:26,807 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 09:28:26,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563293734] [2020-12-23 09:28:26,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:28:26,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:28:26,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533903613] [2020-12-23 09:28:26,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:28:26,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:28:26,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:28:26,848 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-23 09:28:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:26,907 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-12-23 09:28:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:28:26,909 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 09:28:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:26,921 INFO L225 Difference]: With dead ends: 51 [2020-12-23 09:28:26,921 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 09:28:26,928 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 [2020-12-23 09:28:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 09:28:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 09:28:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 09:28:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 09:28:26,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2020-12-23 09:28:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:26,982 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 09:28:26,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:28:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 09:28:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:28:26,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:26,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:26,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:28:26,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2037358761, now seen corresponding path program 1 times [2020-12-23 09:28:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:26,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388930764] [2020-12-23 09:28:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,186 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 09:28:27,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388930764] [2020-12-23 09:28:27,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:28:27,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:28:27,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294034503] [2020-12-23 09:28:27,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:28:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:27,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:28:27,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:28:27,191 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-12-23 09:28:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:27,367 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-12-23 09:28:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:28:27,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:28:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:27,379 INFO L225 Difference]: With dead ends: 54 [2020-12-23 09:28:27,380 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 09:28:27,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:28:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 09:28:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-12-23 09:28:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 09:28:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-23 09:28:27,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 10 [2020-12-23 09:28:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:27,424 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-23 09:28:27,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:28:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-23 09:28:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:28:27,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:27,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:27,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:28:27,431 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1470600778, now seen corresponding path program 1 times [2020-12-23 09:28:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:27,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536299131] [2020-12-23 09:28:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:28:27,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536299131] [2020-12-23 09:28:27,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854492066] [2020-12-23 09:28:27,640 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 09:28:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:27,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:28:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:28:28,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:28,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 09:28:28,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871741801] [2020-12-23 09:28:28,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:28:28,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:28:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:28:28,053 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-12-23 09:28:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:28,387 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-12-23 09:28:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:28:28,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-12-23 09:28:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:28,401 INFO L225 Difference]: With dead ends: 52 [2020-12-23 09:28:28,401 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 09:28:28,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:28:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 09:28:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 21. [2020-12-23 09:28:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:28:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-23 09:28:28,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-12-23 09:28:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:28,425 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-23 09:28:28,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:28:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-23 09:28:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 09:28:28,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:28:28,427 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:28:28,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 09:28:28,629 INFO L429 AbstractCegarLoop]: === Iteration 4 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:28:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:28:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1849931057, now seen corresponding path program 1 times [2020-12-23 09:28:28,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:28:28,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634428482] [2020-12-23 09:28:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:28:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:28,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-12-23 09:28:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:28,853 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 09:28:28,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634428482] [2020-12-23 09:28:28,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770095368] [2020-12-23 09:28:28,876 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 09:28:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:28:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 09:28:28,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:28:28,998 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 7 treesize of output 6 [2020-12-23 09:28:28,999 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 09:28:29,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 09:28:29,004 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 09:28:29,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-12-23 09:28:31,164 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:31,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:31,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:28:31,206 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 09:28:31,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:28:31,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 13 [2020-12-23 09:28:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455585020] [2020-12-23 09:28:31,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:28:31,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:28:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:28:31,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=116, Unknown=1, NotChecked=0, Total=156 [2020-12-23 09:28:31,213 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 13 states. [2020-12-23 09:28:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:28:33,415 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-23 09:28:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:28:33,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-23 09:28:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:28:33,417 INFO L225 Difference]: With dead ends: 23 [2020-12-23 09:28:33,417 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:28:33,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=64, Invalid=175, Unknown=1, NotChecked=0, Total=240 [2020-12-23 09:28:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:28:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:28:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:28:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:28:33,419 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-12-23 09:28:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:28:33,420 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:28:33,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:28:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:28:33,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:28:33,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:28:33,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:28:33,794 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-23 09:28:33,830 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:28:33,831 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:28:33,831 INFO L189 CegarLoopUtils]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-12-23 09:28:33,831 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:28:33,831 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:28:33,831 INFO L192 CegarLoopUtils]: At program point L49(lines 41 50) the Hoare annotation is: true [2020-12-23 09:28:33,832 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc17.base|)) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0))) [2020-12-23 09:28:33,832 INFO L189 CegarLoopUtils]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-12-23 09:28:33,832 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2020-12-23 09:28:33,832 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-12-23 09:28:33,832 INFO L192 CegarLoopUtils]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2020-12-23 09:28:33,832 INFO L189 CegarLoopUtils]: For program point L25(lines 25 26) no Hoare annotation was computed. [2020-12-23 09:28:33,832 INFO L189 CegarLoopUtils]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-12-23 09:28:33,833 INFO L185 CegarLoopUtils]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse1 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (and (let ((.cse0 (= check___VERIFIER_assert_~cond 1))) (or (and .cse0 (= |check_#in~x| 0)) (and .cse0 (<= 1 check_~x)))) (<= 0 check_~x) (<= (+ check_~y 1) check_~n) (= (select |#memory_int| check_~a.base) .cse1)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse1)))) [2020-12-23 09:28:33,833 INFO L189 CegarLoopUtils]: For program point L17(line 17) no Hoare annotation was computed. [2020-12-23 09:28:33,833 INFO L189 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-23 09:28:33,833 INFO L189 CegarLoopUtils]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-12-23 09:28:33,833 INFO L189 CegarLoopUtils]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-12-23 09:28:33,833 INFO L189 CegarLoopUtils]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-12-23 09:28:33,834 INFO L189 CegarLoopUtils]: For program point L11-4(line 11) no Hoare annotation was computed. [2020-12-23 09:28:33,834 INFO L189 CegarLoopUtils]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2020-12-23 09:28:33,834 INFO L189 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2020-12-23 09:28:33,835 INFO L189 CegarLoopUtils]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-12-23 09:28:33,835 INFO L189 CegarLoopUtils]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2020-12-23 09:28:33,835 INFO L189 CegarLoopUtils]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-12-23 09:28:33,835 INFO L189 CegarLoopUtils]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-12-23 09:28:33,836 INFO L189 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2020-12-23 09:28:33,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:28:33 BoogieIcfgContainer [2020-12-23 09:28:33,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:28:33,848 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:28:33,848 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:28:33,848 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:28:33,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:28:26" (3/4) ... [2020-12-23 09:28:33,854 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:28:33,862 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-12-23 09:28:33,870 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-12-23 09:28:33,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-23 09:28:33,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 09:28:33,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:28:33,961 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/verifythis/elimination_max_rec.c-witness.graphml [2020-12-23 09:28:33,962 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:28:33,967 INFO L168 Benchmark]: Toolchain (without parser) took 8489.45 ms. Allocated memory is still 152.0 MB. Free memory was 126.0 MB in the beginning and 57.0 MB in the end (delta: 68.9 MB). Peak memory consumption was 70.8 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,967 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:28:33,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.51 ms. Allocated memory is still 152.0 MB. Free memory was 125.7 MB in the beginning and 115.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.26 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 113.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,972 INFO L168 Benchmark]: Boogie Preprocessor took 45.00 ms. Allocated memory is still 152.0 MB. Free memory was 113.7 MB in the beginning and 112.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,972 INFO L168 Benchmark]: RCFGBuilder took 563.71 ms. Allocated memory is still 152.0 MB. Free memory was 112.7 MB in the beginning and 95.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,973 INFO L168 Benchmark]: TraceAbstraction took 7418.26 ms. Allocated memory is still 152.0 MB. Free memory was 95.5 MB in the beginning and 60.2 MB in the end (delta: 35.3 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,978 INFO L168 Benchmark]: Witness Printer took 117.12 ms. Allocated memory is still 152.0 MB. Free memory was 60.2 MB in the beginning and 57.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:28:33,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 125.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.51 ms. Allocated memory is still 152.0 MB. Free memory was 125.7 MB in the beginning and 115.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 47.26 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 113.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.00 ms. Allocated memory is still 152.0 MB. Free memory was 113.7 MB in the beginning and 112.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 563.71 ms. Allocated memory is still 152.0 MB. Free memory was 112.7 MB in the beginning and 95.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7418.26 ms. Allocated memory is still 152.0 MB. Free memory was 95.5 MB in the beginning and 60.2 MB in the end (delta: 35.3 MB). Peak memory consumption was 37.2 MB. Max. memory is 8.0 GB. * Witness Printer took 117.12 ms. Allocated memory is still 152.0 MB. Free memory was 60.2 MB in the beginning and 57.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 205 SDslu, 178 SDs, 0 SdLazy, 200 SolverSat, 80 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=2, 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, 4 MinimizatonAttempts, 44 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 63 HoareAnnotationTreeSize, 10 FomulaSimplifications, 56 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 4 QuantifiedInterpolants, 7478 SizeOfPredicates, 29 NumberOfNonLiveVariables, 286 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 2/10 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...