/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/recursive-simple/sum_non_eq-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:21:37,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:21:37,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:21:37,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:21:37,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:21:37,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:21:37,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:21:37,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:21:37,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:21:37,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:21:37,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:21:37,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:21:37,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:21:37,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:21:37,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:21:37,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:21:37,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:21:37,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:21:37,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:21:37,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:21:37,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:21:37,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:21:37,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:21:37,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:21:37,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:21:37,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:21:37,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:21:37,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:21:37,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:21:37,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:21:37,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:21:37,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:21:37,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:21:37,990 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:21:37,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:21:37,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:21:37,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:21:37,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:21:37,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:21:37,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:21:37,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:21:37,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:21:37,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:21:37,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:21:37,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:21:37,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:21:37,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:21:37,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:21:37,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:21:37,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:21:37,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:21:37,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:21:37,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:21:37,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:21:37,996 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:21:38,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:21:38,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:21:38,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:21:38,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:21:38,562 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:21:38,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_non_eq-2.c [2021-01-06 19:21:38,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/45091eec8/99b3742674d945e080f0148be0777d29/FLAG3ef91ab69 [2021-01-06 19:21:39,222 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:21:39,222 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_non_eq-2.c [2021-01-06 19:21:39,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/45091eec8/99b3742674d945e080f0148be0777d29/FLAG3ef91ab69 [2021-01-06 19:21:39,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/45091eec8/99b3742674d945e080f0148be0777d29 [2021-01-06 19:21:39,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:21:39,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:21:39,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:21:39,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:21:39,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:21:39,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ff8651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39, skipping insertion in model container [2021-01-06 19:21:39,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:21:39,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:21:39,809 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/recursive-simple/sum_non_eq-2.c[628,641] [2021-01-06 19:21:39,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:21:39,824 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:21:39,841 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/recursive-simple/sum_non_eq-2.c[628,641] [2021-01-06 19:21:39,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:21:39,858 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:21:39,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39 WrapperNode [2021-01-06 19:21:39,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:21:39,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:21:39,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:21:39,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:21:39,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:21:39,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:21:39,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:21:39,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:21:39,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (1/1) ... [2021-01-06 19:21:39,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:21:39,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:21:39,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:21:39,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:21:39,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (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 [2021-01-06 19:21:40,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:21:40,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:21:40,018 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-01-06 19:21:40,018 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-01-06 19:21:40,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:21:40,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:21:40,314 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:21:40,315 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:21:40,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:21:40 BoogieIcfgContainer [2021-01-06 19:21:40,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:21:40,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:21:40,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:21:40,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:21:40,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:21:39" (1/3) ... [2021-01-06 19:21:40,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ea2d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:21:40, skipping insertion in model container [2021-01-06 19:21:40,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:21:39" (2/3) ... [2021-01-06 19:21:40,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ea2d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:21:40, skipping insertion in model container [2021-01-06 19:21:40,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:21:40" (3/3) ... [2021-01-06 19:21:40,329 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_non_eq-2.c [2021-01-06 19:21:40,337 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:21:40,343 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:21:40,366 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:21:40,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:21:40,402 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:21:40,402 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:21:40,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:21:40,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:21:40,403 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:21:40,403 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:21:40,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:21:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:21:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:21:40,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:40,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:40,436 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:21:40,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:40,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225920433] [2021-01-06 19:21:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:21:40,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225920433] [2021-01-06 19:21:40,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:21:40,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:21:40,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101881497] [2021-01-06 19:21:40,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:21:40,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:21:41,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:21:41,012 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2021-01-06 19:21:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:41,194 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 19:21:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:21:41,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 19:21:41,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:41,214 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:21:41,214 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:21:41,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:21:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:21:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:21:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:21:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:21:41,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:21:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:41,275 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:21:41,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:21:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:21:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:21:41,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:41,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:41,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:21:41,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:41,283 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:21:41,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:41,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228440633] [2021-01-06 19:21:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:21:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228440633] [2021-01-06 19:21:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394954756] [2021-01-06 19:21:41,632 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 [2021-01-06 19:21:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 19:21:41,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:21:42,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:42,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-01-06 19:21:42,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747499007] [2021-01-06 19:21:42,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 19:21:42,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 19:21:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:21:42,045 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2021-01-06 19:21:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:42,322 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-01-06 19:21:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:21:42,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 19:21:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:42,324 INFO L225 Difference]: With dead ends: 20 [2021-01-06 19:21:42,324 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:21:42,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:21:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:21:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:21:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:21:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:21:42,327 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-01-06 19:21:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:42,327 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:21:42,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 19:21:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:21:42,328 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:21:42,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:21:42,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:21:42,570 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:21:42,571 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:21:42,571 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:21:42,571 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:21:42,571 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-01-06 19:21:42,572 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-01-06 19:21:42,572 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-01-06 19:21:42,572 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-01-06 19:21:42,572 INFO L189 CegarLoopUtils]: For program point L17-1(line 17) no Hoare annotation was computed. [2021-01-06 19:21:42,572 INFO L189 CegarLoopUtils]: For program point L14(lines 14 21) no Hoare annotation was computed. [2021-01-06 19:21:42,573 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 6 12) no Hoare annotation was computed. [2021-01-06 19:21:42,573 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (not (= (mod sum_~n 4294967296) 0))) [2021-01-06 19:21:42,573 INFO L189 CegarLoopUtils]: For program point L10-1(line 10) no Hoare annotation was computed. [2021-01-06 19:21:42,573 INFO L189 CegarLoopUtils]: For program point L7(lines 7 11) no Hoare annotation was computed. [2021-01-06 19:21:42,573 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 6 12) no Hoare annotation was computed. [2021-01-06 19:21:42,573 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 6 12) the Hoare annotation is: true [2021-01-06 19:21:42,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:21:42 BoogieIcfgContainer [2021-01-06 19:21:42,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:21:42,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:21:42,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:21:42,588 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:21:42,589 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:21:40" (3/4) ... [2021-01-06 19:21:42,598 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:21:42,606 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-01-06 19:21:42,611 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:21:42,611 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-01-06 19:21:42,611 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:21:42,612 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:21:42,654 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_non_eq-2.c-witness.graphml [2021-01-06 19:21:42,654 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:21:42,657 INFO L168 Benchmark]: Toolchain (without parser) took 3065.44 ms. Allocated memory was 159.4 MB in the beginning and 210.8 MB in the end (delta: 51.4 MB). Free memory was 134.4 MB in the beginning and 166.7 MB in the end (delta: -32.2 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:42,657 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 159.4 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:42,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.70 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 125.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:42,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.60 ms. Allocated memory is still 159.4 MB. Free memory was 125.0 MB in the beginning and 123.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:42,660 INFO L168 Benchmark]: Boogie Preprocessor took 21.13 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 122.9 MB in the end (delta: 850.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:42,660 INFO L168 Benchmark]: RCFGBuilder took 398.61 ms. Allocated memory is still 159.4 MB. Free memory was 122.7 MB in the beginning and 111.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:42,661 INFO L168 Benchmark]: TraceAbstraction took 2265.56 ms. Allocated memory was 159.4 MB in the beginning and 210.8 MB in the end (delta: 51.4 MB). Free memory was 110.7 MB in the beginning and 169.3 MB in the end (delta: -58.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:42,662 INFO L168 Benchmark]: Witness Printer took 66.59 ms. Allocated memory is still 210.8 MB. Free memory was 168.8 MB in the beginning and 166.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:42,666 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 159.4 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.70 ms. Allocated memory is still 159.4 MB. Free memory was 134.2 MB in the beginning and 125.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.60 ms. Allocated memory is still 159.4 MB. Free memory was 125.0 MB in the beginning and 123.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.13 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 122.9 MB in the end (delta: 850.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 398.61 ms. Allocated memory is still 159.4 MB. Free memory was 122.7 MB in the beginning and 111.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2265.56 ms. Allocated memory was 159.4 MB in the beginning and 210.8 MB in the end (delta: 51.4 MB). Free memory was 110.7 MB in the beginning and 169.3 MB in the end (delta: -58.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 66.59 ms. Allocated memory is still 210.8 MB. Free memory was 168.8 MB in the beginning and 166.7 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: 19]: 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 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 12 SDslu, 63 SDs, 0 SdLazy, 109 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 15 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 5190 SizeOfPredicates, 7 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...