/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_2x3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:27:50,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:27:50,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:27:50,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:27:50,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:27:50,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:27:50,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:27:50,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:27:50,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:27:50,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:27:50,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:27:50,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:27:50,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:27:50,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:27:50,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:27:50,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:27:50,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:27:50,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:27:50,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:27:50,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:27:50,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:27:50,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:27:50,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:27:50,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:27:50,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:27:50,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:27:50,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:27:50,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:27:50,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:27:50,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:27:50,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:27:50,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:27:50,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:27:50,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:27:50,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:27:50,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:27:50,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:27:50,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:27:50,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:27:50,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:27:50,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:27:50,207 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 09:27:50,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:27:50,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:27:50,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:27:50,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:27:50,254 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:27:50,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:27:50,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:27:50,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:27:50,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:27:50,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:27:50,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:27:50,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:27:50,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:27:50,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:27:50,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:27:50,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:27:50,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:27:50,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:50,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:27:50,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:27:50,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:27:50,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:27:50,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:27:50,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:27:50,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:27:50,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:27:50,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:27:50,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:27:50,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:27:50,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:27:50,710 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:27:50,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_2x3-2.c [2020-12-23 09:27:50,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eb37d4723/168d2cedcc5046f88434284c60d04892/FLAGe9b541423 [2020-12-23 09:27:51,367 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:27:51,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_2x3-2.c [2020-12-23 09:27:51,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eb37d4723/168d2cedcc5046f88434284c60d04892/FLAGe9b541423 [2020-12-23 09:27:51,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/eb37d4723/168d2cedcc5046f88434284c60d04892 [2020-12-23 09:27:51,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:27:51,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:27:51,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:51,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:27:51,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:27:51,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a078b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51, skipping insertion in model container [2020-12-23 09:27:51,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:27:51,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:27:52,000 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_2x3-2.c[479,492] [2020-12-23 09:27:52,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:52,023 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:27:52,041 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_2x3-2.c[479,492] [2020-12-23 09:27:52,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:52,058 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:27:52,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52 WrapperNode [2020-12-23 09:27:52,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:52,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:52,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:27:52,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:27:52,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:52,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:27:52,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:27:52,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:27:52,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (1/1) ... [2020-12-23 09:27:52,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:27:52,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:27:52,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:27:52,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:27:52,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (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 09:27:52,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:27:52,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:27:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-23 09:27:52,226 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-23 09:27:52,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:27:52,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:27:52,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:27:52,475 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:27:52,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:52 BoogieIcfgContainer [2020-12-23 09:27:52,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:27:52,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:27:52,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:27:52,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:27:52,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:27:51" (1/3) ... [2020-12-23 09:27:52,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c06d775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:52, skipping insertion in model container [2020-12-23 09:27:52,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:52" (2/3) ... [2020-12-23 09:27:52,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c06d775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:52, skipping insertion in model container [2020-12-23 09:27:52,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:52" (3/3) ... [2020-12-23 09:27:52,487 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c [2020-12-23 09:27:52,494 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:27:52,499 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:27:52,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:27:52,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:27:52,596 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:27:52,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:27:52,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:27:52,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:27:52,597 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:27:52,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:27:52,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:27:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:27:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:27:52,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:52,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:52,634 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:27:52,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:52,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814859567] [2020-12-23 09:27:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,983 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 09:27:52,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814859567] [2020-12-23 09:27:52,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:27:52,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:27:52,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807420984] [2020-12-23 09:27:52,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:27:52,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:27:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:27:53,020 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:27:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:53,131 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:27:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:27:53,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:27:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:53,142 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:53,142 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:27:53,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:27:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:27:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:27:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:27:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:27:53,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:27:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:53,184 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:27:53,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:27:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:27:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:27:53,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:53,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:53,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:27:53,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:27:53,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:53,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057265850] [2020-12-23 09:27:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:53,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057265850] [2020-12-23 09:27:53,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415659146] [2020-12-23 09:27:53,321 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 09:27:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:53,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:27:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:53,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:53,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 09:27:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991922118] [2020-12-23 09:27:53,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:27:53,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:53,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:27:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:27:53,538 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-12-23 09:27:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:53,686 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:27:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:27:53,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 09:27:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:53,688 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:27:53,688 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:27:53,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:27:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:27:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:27:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:27:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:27:53,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:27:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:53,697 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:27:53,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:27:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:27:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:27:53,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:53,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:53,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:27:53,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:27:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181772403] [2020-12-23 09:27:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:27:54,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181772403] [2020-12-23 09:27:54,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927799292] [2020-12-23 09:27:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:27:54,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:54,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:54,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 09:27:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:27:54,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:54,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 09:27:54,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838675851] [2020-12-23 09:27:54,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:27:54,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:27:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:27:54,696 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 14 states. [2020-12-23 09:27:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:55,029 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:27:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:27:55,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-12-23 09:27:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:55,031 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:55,031 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:27:55,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:27:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:27:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:27:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:27:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:27:55,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:27:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:55,040 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:27:55,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:27:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:27:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:27:55,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:55,042 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:55,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:55,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:27:55,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:55,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157396342] [2020-12-23 09:27:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:55,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:55,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:55,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:55,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 09:27:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157396342] [2020-12-23 09:27:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349837266] [2020-12-23 09:27:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:55,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:27:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:55,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:27:55,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 09:27:55,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:55,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-12-23 09:27:55,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082503518] [2020-12-23 09:27:55,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:27:55,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:55,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:27:55,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:27:55,554 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-12-23 09:27:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:55,647 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-12-23 09:27:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:27:55,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-23 09:27:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:55,649 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:27:55,650 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:27:55,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:27:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:27:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:27:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:27:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:27:55,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-12-23 09:27:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:55,652 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:27:55,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:27:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:27:55,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:27:55,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:55,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:27:55,910 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:27:55,910 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:27:55,910 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:27:55,910 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:27:55,911 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-23 09:27:55,911 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-23 09:27:55,911 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-23 09:27:55,911 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 2) [2020-12-23 09:27:55,911 INFO L189 CegarLoopUtils]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-23 09:27:55,911 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-23 09:27:55,912 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-12-23 09:27:55,912 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-12-23 09:27:55,912 INFO L189 CegarLoopUtils]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-12-23 09:27:55,912 INFO L189 CegarLoopUtils]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-12-23 09:27:55,912 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-12-23 09:27:55,912 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-12-23 09:27:55,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:55 BoogieIcfgContainer [2020-12-23 09:27:55,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:55,919 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:55,919 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:55,919 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:55,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:52" (3/4) ... [2020-12-23 09:27:55,922 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:27:55,929 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-12-23 09:27:55,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:27:55,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-23 09:27:55,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:55,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:55,971 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_2x3-2.c-witness.graphml [2020-12-23 09:27:55,971 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:55,973 INFO L168 Benchmark]: Toolchain (without parser) took 4234.68 ms. Allocated memory was 169.9 MB in the beginning and 211.8 MB in the end (delta: 41.9 MB). Free memory was 144.8 MB in the beginning and 105.2 MB in the end (delta: 39.6 MB). Peak memory consumption was 83.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,974 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 169.9 MB. Free memory is still 142.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:55,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.45 ms. Allocated memory is still 169.9 MB. Free memory was 144.5 MB in the beginning and 135.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,975 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.42 ms. Allocated memory is still 169.9 MB. Free memory was 135.4 MB in the beginning and 134.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,976 INFO L168 Benchmark]: Boogie Preprocessor took 20.22 ms. Allocated memory is still 169.9 MB. Free memory was 134.1 MB in the beginning and 133.1 MB in the end (delta: 974.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,976 INFO L168 Benchmark]: RCFGBuilder took 357.92 ms. Allocated memory is still 169.9 MB. Free memory was 133.1 MB in the beginning and 121.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,977 INFO L168 Benchmark]: TraceAbstraction took 3439.25 ms. Allocated memory was 169.9 MB in the beginning and 211.8 MB in the end (delta: 41.9 MB). Free memory was 121.3 MB in the beginning and 107.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,978 INFO L168 Benchmark]: Witness Printer took 52.48 ms. Allocated memory is still 211.8 MB. Free memory was 107.3 MB in the beginning and 105.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:55,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 169.9 MB. Free memory is still 142.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.45 ms. Allocated memory is still 169.9 MB. Free memory was 144.5 MB in the beginning and 135.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.42 ms. Allocated memory is still 169.9 MB. Free memory was 135.4 MB in the beginning and 134.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.22 ms. Allocated memory is still 169.9 MB. Free memory was 134.1 MB in the beginning and 133.1 MB in the end (delta: 974.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 357.92 ms. Allocated memory is still 169.9 MB. Free memory was 133.1 MB in the beginning and 121.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3439.25 ms. Allocated memory was 169.9 MB in the beginning and 211.8 MB in the end (delta: 41.9 MB). Free memory was 121.3 MB in the beginning and 107.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. * Witness Printer took 52.48 ms. Allocated memory is still 211.8 MB. Free memory was 107.3 MB in the beginning and 105.2 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: 18]: 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: 3.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 45 SDslu, 117 SDs, 0 SdLazy, 199 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 14 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 135 ConstructedInterpolants, 0 QuantifiedInterpolants, 10443 SizeOfPredicates, 15 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 70/96 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...