java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:04:22,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:04:22,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:04:22,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:04:22,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:04:22,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:04:22,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:04:22,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:04:22,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:04:22,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:04:22,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:04:22,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:04:22,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:04:22,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:04:22,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:04:22,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:04:22,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:04:22,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:04:22,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:04:22,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:04:22,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:04:22,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:04:22,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:04:22,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:04:22,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:04:22,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:04:22,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:04:22,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:04:22,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:04:22,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:04:22,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:04:22,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:04:22,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:04:22,608 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:04:22,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:04:22,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:04:22,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:04:22,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:04:22,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:04:22,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:04:22,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:04:22,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:04:22,610 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:04:22,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:04:22,611 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:04:22,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:04:22,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:04:22,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:04:22,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:04:22,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:04:22,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:22,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:04:22,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:04:22,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:04:22,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:04:22,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:04:22,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:04:22,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:04:22,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:04:22,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:04:22,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:04:22,893 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:04:22,893 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:04:22,894 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-10-15 01:04:22,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16565aee0/b9f09f777dbe4d519044721d13f5c67a/FLAG278eace7b [2019-10-15 01:04:23,417 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:04:23,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-10-15 01:04:23,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16565aee0/b9f09f777dbe4d519044721d13f5c67a/FLAG278eace7b [2019-10-15 01:04:23,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16565aee0/b9f09f777dbe4d519044721d13f5c67a [2019-10-15 01:04:23,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:04:23,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:04:23,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:23,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:04:23,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:04:23,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:23" (1/1) ... [2019-10-15 01:04:23,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:23, skipping insertion in model container [2019-10-15 01:04:23,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:23" (1/1) ... [2019-10-15 01:04:23,846 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:04:23,864 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:04:24,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:24,080 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:04:24,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:24,126 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:04:24,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24 WrapperNode [2019-10-15 01:04:24,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:24,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:04:24,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:04:24,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:04:24,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... [2019-10-15 01:04:24,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:04:24,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:04:24,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:04:24,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:04:24,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-15 01:04:24,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:04:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:04:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:04:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:04:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:04:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:04:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:04:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:04:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:04:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:04:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:04:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:04:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:04:24,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:04:24,484 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:04:24,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:24 BoogieIcfgContainer [2019-10-15 01:04:24,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:04:24,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:04:24,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:04:24,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:04:24,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:04:23" (1/3) ... [2019-10-15 01:04:24,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2896b992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:24, skipping insertion in model container [2019-10-15 01:04:24,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:24" (2/3) ... [2019-10-15 01:04:24,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2896b992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:24, skipping insertion in model container [2019-10-15 01:04:24,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:24" (3/3) ... [2019-10-15 01:04:24,512 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2019-10-15 01:04:24,530 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:04:24,551 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:04:24,578 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:04:24,605 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:04:24,605 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:04:24,605 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:04:24,605 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:04:24,606 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:04:24,606 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:04:24,606 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:04:24,606 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:04:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:04:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:04:24,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:24,651 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:24,653 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2019-10-15 01:04:24,673 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:24,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279498207] [2019-10-15 01:04:24,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:24,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:24,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:24,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279498207] [2019-10-15 01:04:24,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:24,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:04:24,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667552140] [2019-10-15 01:04:24,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:04:24,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:04:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:04:24,798 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-15 01:04:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:24,816 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-10-15 01:04:24,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:04:24,818 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-15 01:04:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:24,825 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:04:24,826 INFO L226 Difference]: Without dead ends: 14 [2019-10-15 01:04:24,829 INFO L600 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 [2019-10-15 01:04:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-15 01:04:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-15 01:04:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 01:04:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-15 01:04:24,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-15 01:04:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:24,863 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-15 01:04:24,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:04:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-15 01:04:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:04:24,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:24,864 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:24,865 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2019-10-15 01:04:24,866 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:24,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828483276] [2019-10-15 01:04:24,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:24,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:24,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:24,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828483276] [2019-10-15 01:04:24,918 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:24,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:04:24,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093264628] [2019-10-15 01:04:24,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:04:24,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:04:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:24,922 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2019-10-15 01:04:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:24,942 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-15 01:04:24,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:04:24,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:04:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:24,944 INFO L225 Difference]: With dead ends: 22 [2019-10-15 01:04:24,944 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:04:24,945 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:04:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-15 01:04:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:04:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 01:04:24,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-10-15 01:04:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:24,950 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 01:04:24,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:04:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 01:04:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:04:24,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:24,952 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:24,952 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2019-10-15 01:04:24,953 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:24,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440168960] [2019-10-15 01:04:24,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:24,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:24,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:25,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440168960] [2019-10-15 01:04:25,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920846220] [2019-10-15 01:04:25,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2019-10-15 01:04:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:25,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:04:25,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:25,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:25,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [591319610] [2019-10-15 01:04:25,176 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 15 [2019-10-15 01:04:25,212 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:04:25,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:04:25,264 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:04:25,266 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 17 variables. [2019-10-15 01:04:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:25,269 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:04:25,298 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-15 01:04:25,300 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:04:25,301 INFO L553 sIntCurrentIteration]: We unified 13 AI predicates to 13 [2019-10-15 01:04:25,301 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:04:25,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:25,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:04:25,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785891877] [2019-10-15 01:04:25,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:04:25,304 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:25,304 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:04:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:04:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:04:25,305 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 2 states. [2019-10-15 01:04:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:25,307 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-15 01:04:25,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:04:25,308 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-10-15 01:04:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:25,308 INFO L225 Difference]: With dead ends: 15 [2019-10-15 01:04:25,308 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:04:25,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:04:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:04:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:04:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:04:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:04:25,310 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-10-15 01:04:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:25,310 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:04:25,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:04:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:04:25,311 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:04:25,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:25,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:04:25,549 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:04:25,550 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:04:25,550 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:04:25,550 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:04:25,550 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:04:25,550 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:04:25,551 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:04:25,551 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2019-10-15 01:04:25,551 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2019-10-15 01:04:25,551 INFO L439 ceAbstractionStarter]: At program point L18(line 18) the Hoare annotation is: false [2019-10-15 01:04:25,551 INFO L443 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-10-15 01:04:25,551 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2019-10-15 01:04:25,552 INFO L443 ceAbstractionStarter]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2019-10-15 01:04:25,552 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 16) the Hoare annotation is: false [2019-10-15 01:04:25,552 INFO L443 ceAbstractionStarter]: For program point L14-4(lines 14 16) no Hoare annotation was computed. [2019-10-15 01:04:25,552 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-15 01:04:25,552 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-15 01:04:25,552 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-15 01:04:25,553 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-15 01:04:25,553 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-15 01:04:25,553 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-15 01:04:25,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:04:25 BoogieIcfgContainer [2019-10-15 01:04:25,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:04:25,563 INFO L168 Benchmark]: Toolchain (without parser) took 1732.64 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 103.0 MB in the beginning and 115.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:25,564 INFO L168 Benchmark]: CDTParser took 1.19 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:04:25,565 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.05 ms. Allocated memory is still 145.8 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:25,566 INFO L168 Benchmark]: Boogie Preprocessor took 114.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 180.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:25,566 INFO L168 Benchmark]: RCFGBuilder took 251.47 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 167.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:25,569 INFO L168 Benchmark]: TraceAbstraction took 1066.51 ms. Allocated memory is still 202.4 MB. Free memory was 167.7 MB in the beginning and 115.4 MB in the end (delta: 52.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:25,573 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.05 ms. Allocated memory is still 145.8 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 180.1 MB in the end (delta: -86.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 251.47 ms. Allocated memory is still 202.4 MB. Free memory was 180.1 MB in the beginning and 167.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1066.51 ms. Allocated memory is still 202.4 MB. Free memory was 167.7 MB in the beginning and 115.4 MB in the end (delta: 52.3 MB). Peak memory consumption was 52.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 1 SDslu, 10 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 1005 SizeOfPredicates, 1 NumberOfNonLiveVariables, 53 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 93, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9423076923076923, AVG_VARS_REMOVED_DURING_WEAKENING: 0.6923076923076923, AVG_WEAKENED_CONJUNCTS: 0.46153846153846156, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...