/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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:40:29,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:40:29,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:40:29,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:40:29,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:40:29,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:40:29,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:40:29,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:40:29,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:40:29,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:40:29,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:40:29,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:40:29,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:40:29,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:40:29,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:40:29,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:40:29,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:40:29,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:40:29,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:40:29,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:40:29,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:40:29,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:40:29,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:40:29,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:40:29,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:40:29,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:40:29,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:40:29,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:40:29,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:40:29,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:40:29,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:40:29,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:40:29,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:40:29,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:40:29,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:40:29,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:40:29,676 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 16:40:29,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:40:29,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:40:29,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:40:29,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:40:29,740 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:40:29,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:40:29,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:40:29,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:40:29,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:40:29,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:40:29,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:40:29,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:40:29,743 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:40:29,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:40:29,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:40:29,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:40:29,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:40:29,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:29,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:40:29,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:40:29,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:40:29,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:40:29,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:40:29,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:40:29,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:40:29,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:40:30,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:40:30,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:40:30,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:40:30,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:40:30,263 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:40:30,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-01-06 16:40:30,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ef58d0cd/e89744a50ed8401fad484885870427da/FLAG6860d5b98 [2021-01-06 16:40:31,056 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:40:31,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-01-06 16:40:31,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ef58d0cd/e89744a50ed8401fad484885870427da/FLAG6860d5b98 [2021-01-06 16:40:31,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ef58d0cd/e89744a50ed8401fad484885870427da [2021-01-06 16:40:31,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:40:31,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:40:31,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:31,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:40:31,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:40:31,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ee1a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31, skipping insertion in model container [2021-01-06 16:40:31,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:40:31,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:40:31,589 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/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2021-01-06 16:40:31,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:31,623 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:40:31,639 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/loops/sum01_bug02_sum01_bug02_base.case.i[834,847] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2021-01-06 16:40:31,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:31,661 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:40:31,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31 WrapperNode [2021-01-06 16:40:31,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:31,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:31,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:40:31,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:40:31,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:31,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:40:31,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:40:31,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:40:31,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (1/1) ... [2021-01-06 16:40:31,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:40:31,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:40:31,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:40:31,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:40:31,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (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 16:40:31,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:40:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:40:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:40:31,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:40:32,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:40:32,071 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:40:32,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:32 BoogieIcfgContainer [2021-01-06 16:40:32,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:40:32,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:40:32,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:40:32,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:40:32,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:40:31" (1/3) ... [2021-01-06 16:40:32,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6ac633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:32, skipping insertion in model container [2021-01-06 16:40:32,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:31" (2/3) ... [2021-01-06 16:40:32,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6ac633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:32, skipping insertion in model container [2021-01-06 16:40:32,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:32" (3/3) ... [2021-01-06 16:40:32,084 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2021-01-06 16:40:32,092 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:40:32,098 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:40:32,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:40:32,199 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:40:32,199 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:40:32,200 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:40:32,200 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:40:32,200 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:40:32,200 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:40:32,200 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:40:32,200 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:40:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:40:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:40:32,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:32,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:40:32,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 16:40:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823473439] [2021-01-06 16:40:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:32,538 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 16:40:32,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823473439] [2021-01-06 16:40:32,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:32,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:40:32,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901103472] [2021-01-06 16:40:32,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:40:32,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:32,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:40:32,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:32,575 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 16:40:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:32,596 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-01-06 16:40:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:40:32,598 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:40:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:32,609 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:40:32,609 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:40:32,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:40:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:40:32,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:40:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-01-06 16:40:32,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-01-06 16:40:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:32,656 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-01-06 16:40:32,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:40:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-01-06 16:40:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:40:32,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:32,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:40:32,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:40:32,658 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-01-06 16:40:32,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:32,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344124631] [2021-01-06 16:40:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:32,779 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 16:40:32,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344124631] [2021-01-06 16:40:32,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:32,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:40:32,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714005041] [2021-01-06 16:40:32,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:40:32,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:40:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:40:32,785 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2021-01-06 16:40:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:32,842 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-01-06 16:40:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:32,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 16:40:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:32,844 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:40:32,845 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:40:32,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:40:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:40:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:40:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:40:32,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 16:40:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:32,851 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:40:32,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:40:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:40:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:40:32,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:32,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:32,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:40:32,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-01-06 16:40:32,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:32,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26777420] [2021-01-06 16:40:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:32,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26777420] [2021-01-06 16:40:32,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:32,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:40:32,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740600129] [2021-01-06 16:40:32,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:40:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:40:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:40:32,966 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-01-06 16:40:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:33,014 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-01-06 16:40:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:40:33,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 16:40:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:33,017 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:40:33,017 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:40:33,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:40:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:40:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 16:40:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:40:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 16:40:33,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-01-06 16:40:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:33,031 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 16:40:33,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:40:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 16:40:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:40:33,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:33,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:33,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:40:33,033 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:33,035 INFO L82 PathProgramCache]: Analyzing trace with hash -275361512, now seen corresponding path program 1 times [2021-01-06 16:40:33,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:33,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926300780] [2021-01-06 16:40:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:33,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926300780] [2021-01-06 16:40:33,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992106612] [2021-01-06 16:40:33,330 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 16:40:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:40:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:33,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:40:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:33,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:33,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-01-06 16:40:33,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893489855] [2021-01-06 16:40:33,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:40:33,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:33,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:40:33,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:40:33,663 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 11 states. [2021-01-06 16:40:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:33,796 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-01-06 16:40:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:40:33,797 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2021-01-06 16:40:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:33,798 INFO L225 Difference]: With dead ends: 17 [2021-01-06 16:40:33,798 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:40:33,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:40:33,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:40:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:40:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:40:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:40:33,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-01-06 16:40:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:33,804 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:40:33,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:40:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:40:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:40:33,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:33,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:34,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:34,021 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1631725588, now seen corresponding path program 1 times [2021-01-06 16:40:34,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:34,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750539115] [2021-01-06 16:40:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:34,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750539115] [2021-01-06 16:40:34,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117867674] [2021-01-06 16:40:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:40:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:34,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:34,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:40:34,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279606325] [2021-01-06 16:40:34,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:40:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:40:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:34,145 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2021-01-06 16:40:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:34,170 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-01-06 16:40:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:34,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 16:40:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:34,171 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:40:34,172 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:40:34,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:40:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 16:40:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:40:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:40:34,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-01-06 16:40:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:34,177 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:40:34,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:40:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:40:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:40:34,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:34,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:34,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:34,393 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1688983890, now seen corresponding path program 2 times [2021-01-06 16:40:34,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:34,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471060438] [2021-01-06 16:40:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:34,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471060438] [2021-01-06 16:40:34,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235059116] [2021-01-06 16:40:34,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:34,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:40:34,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:34,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:40:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:34,813 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:40:34,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:40:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:34,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:34,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-06 16:40:34,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834792199] [2021-01-06 16:40:34,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:40:34,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:34,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:40:34,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:40:34,840 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 14 states. [2021-01-06 16:40:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:35,127 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 16:40:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:40:35,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2021-01-06 16:40:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:35,129 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:40:35,129 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:40:35,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:40:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:40:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:40:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:40:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 16:40:35,135 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-01-06 16:40:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:35,135 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 16:40:35,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:40:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 16:40:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:40:35,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:35,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:35,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:35,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1778778726, now seen corresponding path program 2 times [2021-01-06 16:40:35,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:35,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628799614] [2021-01-06 16:40:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:35,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628799614] [2021-01-06 16:40:35,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194415243] [2021-01-06 16:40:35,416 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:35,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:40:35,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:40:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:35,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:35,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:40:35,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752118218] [2021-01-06 16:40:35,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:40:35,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:40:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:40:35,502 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2021-01-06 16:40:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:35,533 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-01-06 16:40:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:40:35,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 16:40:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:35,534 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:40:35,534 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:40:35,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:40:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:40:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:40:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:40:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 16:40:35,540 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-06 16:40:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:35,540 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 16:40:35,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:40:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 16:40:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:40:35,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:35,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:35,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:35,756 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1928524372, now seen corresponding path program 3 times [2021-01-06 16:40:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:35,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524518564] [2021-01-06 16:40:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:40:35,788 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:40:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:40:35,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:40:35,861 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:40:35,861 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:40:35,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 16:40:35,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:40:35 BoogieIcfgContainer [2021-01-06 16:40:35,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:40:35,915 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:40:35,915 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:40:35,916 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:40:35,916 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:32" (3/4) ... [2021-01-06 16:40:35,919 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:40:35,980 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum01_bug02_sum01_bug02_base.case.i-witness.graphml [2021-01-06 16:40:35,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:40:35,983 INFO L168 Benchmark]: Toolchain (without parser) took 4592.81 ms. Allocated memory was 158.3 MB in the beginning and 200.3 MB in the end (delta: 41.9 MB). Free memory was 134.3 MB in the beginning and 91.8 MB in the end (delta: 42.5 MB). Peak memory consumption was 85.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,984 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 158.3 MB. Free memory is still 130.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:40:35,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.55 ms. Allocated memory is still 158.3 MB. Free memory was 134.0 MB in the beginning and 124.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 158.3 MB. Free memory was 124.5 MB in the beginning and 123.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,986 INFO L168 Benchmark]: Boogie Preprocessor took 26.26 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 122.2 MB in the end (delta: 992.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,987 INFO L168 Benchmark]: RCFGBuilder took 341.20 ms. Allocated memory is still 158.3 MB. Free memory was 122.0 MB in the beginning and 111.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,988 INFO L168 Benchmark]: TraceAbstraction took 3839.12 ms. Allocated memory was 158.3 MB in the beginning and 200.3 MB in the end (delta: 41.9 MB). Free memory was 110.7 MB in the beginning and 93.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 59.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,988 INFO L168 Benchmark]: Witness Printer took 65.63 ms. Allocated memory is still 200.3 MB. Free memory was 93.9 MB in the beginning and 91.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:35,992 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 158.3 MB. Free memory is still 130.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.55 ms. Allocated memory is still 158.3 MB. Free memory was 134.0 MB in the beginning and 124.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.23 ms. Allocated memory is still 158.3 MB. Free memory was 124.5 MB in the beginning and 123.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.26 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 122.2 MB in the end (delta: 992.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 341.20 ms. Allocated memory is still 158.3 MB. Free memory was 122.0 MB in the beginning and 111.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3839.12 ms. Allocated memory was 158.3 MB in the beginning and 200.3 MB in the end (delta: 41.9 MB). Free memory was 110.7 MB in the beginning and 93.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 59.7 MB. Max. memory is 8.0 GB. * Witness Printer took 65.63 ms. Allocated memory is still 200.3 MB. Free memory was 93.9 MB in the beginning and 91.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 23 SDslu, 85 SDs, 0 SdLazy, 225 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=6, 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, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 5073 SizeOfPredicates, 9 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 17/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...