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 -i ../../../trunk/examples/svcomp/array-crafted/bAnd5.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:41:12,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:41:12,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:41:12,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:41:12,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:41:12,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:41:12,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:41:12,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:41:12,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:41:12,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:41:12,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:41:12,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:41:12,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:41:12,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:41:12,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:41:12,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:41:12,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:41:12,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:41:12,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:41:12,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:41:12,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:41:12,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:41:12,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:41:12,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:41:12,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:41:12,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:41:12,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:41:12,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:41:12,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:41:12,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:41:12,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:41:12,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:41:12,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:41:12,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:41:12,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:41:12,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:41:12,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:41:12,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:41:12,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:41:12,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:41:12,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:41:12,746 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 [2019-10-13 17:41:12,784 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:41:12,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:41:12,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:41:12,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:41:12,791 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:41:12,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:41:12,792 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:41:12,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:41:12,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:41:12,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:41:12,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:41:12,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:41:12,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:41:12,793 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:41:12,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:41:12,794 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:41:12,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:41:12,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:41:12,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:41:12,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:41:12,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:41:12,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:41:12,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:41:12,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:41:12,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:41:12,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:41:13,135 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:41:13,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:41:13,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:41:13,155 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:41:13,156 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:41:13,157 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd5.i [2019-10-13 17:41:13,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc3ef560e/61d6ac8bc4a84e3a961d75661f43935d/FLAG5cf9ed590 [2019-10-13 17:41:13,683 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:41:13,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd5.i [2019-10-13 17:41:13,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc3ef560e/61d6ac8bc4a84e3a961d75661f43935d/FLAG5cf9ed590 [2019-10-13 17:41:14,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc3ef560e/61d6ac8bc4a84e3a961d75661f43935d [2019-10-13 17:41:14,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:41:14,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:41:14,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:41:14,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:41:14,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320bbd13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,122 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:41:14,140 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:41:14,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,374 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:41:14,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,563 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:41:14,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14 WrapperNode [2019-10-13 17:41:14,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:41:14,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:41:14,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:41:14,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:41:14,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:41:14,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (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 [2019-10-13 17:41:14,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:41:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:41:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-13 17:41:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:41:14,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:41:14,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:41:14,686 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-13 17:41:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:41:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:41:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:41:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:41:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:41:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:41:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:41:15,024 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:41:15,025 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:41:15,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:15 BoogieIcfgContainer [2019-10-13 17:41:15,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:41:15,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:41:15,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:41:15,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:41:15,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:41:14" (1/3) ... [2019-10-13 17:41:15,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93526a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:15, skipping insertion in model container [2019-10-13 17:41:15,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (2/3) ... [2019-10-13 17:41:15,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93526a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:15, skipping insertion in model container [2019-10-13 17:41:15,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:15" (3/3) ... [2019-10-13 17:41:15,035 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2019-10-13 17:41:15,044 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:41:15,052 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:41:15,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:41:15,093 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:41:15,093 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:41:15,093 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:41:15,094 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:41:15,094 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:41:15,094 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:41:15,094 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:41:15,094 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:41:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-13 17:41:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 17:41:15,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,131 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,133 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1089041636, now seen corresponding path program 1 times [2019-10-13 17:41:15,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234186036] [2019-10-13 17:41:15,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234186036] [2019-10-13 17:41:15,408 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:41:15,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:41:15,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608432457] [2019-10-13 17:41:15,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,427 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-13 17:41:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,593 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-10-13 17:41:15,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-10-13 17:41:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,612 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:41:15,612 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:41:15,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:41:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 17:41:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:41:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:41:15,659 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2019-10-13 17:41:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,660 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:41:15,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:41:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 17:41:15,663 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,663 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,664 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1200270940, now seen corresponding path program 1 times [2019-10-13 17:41:15,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033780505] [2019-10-13 17:41:15,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033780505] [2019-10-13 17:41:15,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:41:15,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:41:15,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960033732] [2019-10-13 17:41:15,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:41:15,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:41:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:15,842 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-10-13 17:41:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,945 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2019-10-13 17:41:15,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:41:15,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-10-13 17:41:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,947 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:41:15,947 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:41:15,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:41:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:41:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:41:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-13 17:41:15,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 33 [2019-10-13 17:41:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,957 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-13 17:41:15,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:41:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-13 17:41:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 17:41:15,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,959 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,960 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash 592534566, now seen corresponding path program 1 times [2019-10-13 17:41:15,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987688543] [2019-10-13 17:41:15,961 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,961 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:41:16,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987688543] [2019-10-13 17:41:16,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142555619] [2019-10-13 17:41:16,158 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 [2019-10-13 17:41:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:16,327 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:16,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 17:41:16,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059556604] [2019-10-13 17:41:16,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:41:16,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:41:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:41:16,329 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2019-10-13 17:41:16,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,560 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2019-10-13 17:41:16,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:41:16,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-10-13 17:41:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,562 INFO L225 Difference]: With dead ends: 51 [2019-10-13 17:41:16,562 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:41:16,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:41:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:41:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-10-13 17:41:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:41:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-13 17:41:16,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 35 [2019-10-13 17:41:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,580 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-13 17:41:16,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:41:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-13 17:41:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 17:41:16,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,584 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:16,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,791 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,792 INFO L82 PathProgramCache]: Analyzing trace with hash 476203942, now seen corresponding path program 1 times [2019-10-13 17:41:16,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935720519] [2019-10-13 17:41:16,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:16,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935720519] [2019-10-13 17:41:16,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577993105] [2019-10-13 17:41:16,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2019-10-13 17:41:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:41:17,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:17,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-10-13 17:41:17,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758091781] [2019-10-13 17:41:17,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:41:17,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:41:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,073 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2019-10-13 17:41:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,125 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-13 17:41:17,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:41:17,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-13 17:41:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,128 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:17,128 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:41:17,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:41:17,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-13 17:41:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:41:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-13 17:41:17,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 43 [2019-10-13 17:41:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,140 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-13 17:41:17,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:41:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-13 17:41:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:41:17,141 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,142 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:17,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,346 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,347 INFO L82 PathProgramCache]: Analyzing trace with hash -106794812, now seen corresponding path program 1 times [2019-10-13 17:41:17,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116099583] [2019-10-13 17:41:17,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 17:41:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 17:41:17,559 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-13 17:41:17,559 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 17:41:17,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:41:17 BoogieIcfgContainer [2019-10-13 17:41:17,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 17:41:17,649 INFO L168 Benchmark]: Toolchain (without parser) took 3541.91 ms. Allocated memory was 140.0 MB in the beginning and 233.3 MB in the end (delta: 93.3 MB). Free memory was 105.4 MB in the beginning and 117.6 MB in the end (delta: -12.2 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. [2019-10-13 17:41:17,651 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 140.0 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 17:41:17,652 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.96 ms. Allocated memory was 140.0 MB in the beginning and 206.0 MB in the end (delta: 66.1 MB). Free memory was 105.2 MB in the beginning and 184.9 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2019-10-13 17:41:17,654 INFO L168 Benchmark]: Boogie Preprocessor took 60.59 ms. Allocated memory is still 206.0 MB. Free memory was 184.9 MB in the beginning and 182.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-13 17:41:17,659 INFO L168 Benchmark]: RCFGBuilder took 400.80 ms. Allocated memory is still 206.0 MB. Free memory was 182.5 MB in the beginning and 166.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-10-13 17:41:17,660 INFO L168 Benchmark]: TraceAbstraction took 2617.23 ms. Allocated memory was 206.0 MB in the beginning and 233.3 MB in the end (delta: 27.3 MB). Free memory was 165.5 MB in the beginning and 117.6 MB in the end (delta: 47.9 MB). Peak memory consumption was 75.2 MB. Max. memory is 7.1 GB. [2019-10-13 17:41:17,671 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 140.0 MB. Free memory was 123.2 MB in the beginning and 123.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 458.96 ms. Allocated memory was 140.0 MB in the beginning and 206.0 MB in the end (delta: 66.1 MB). Free memory was 105.2 MB in the beginning and 184.9 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.59 ms. Allocated memory is still 206.0 MB. Free memory was 184.9 MB in the beginning and 182.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.80 ms. Allocated memory is still 206.0 MB. Free memory was 182.5 MB in the beginning and 166.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2617.23 ms. Allocated memory was 206.0 MB in the beginning and 233.3 MB in the end (delta: 27.3 MB). Free memory was 165.5 MB in the beginning and 117.6 MB in the end (delta: 47.9 MB). Peak memory consumption was 75.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 46]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 14. Possible FailurePath: [L6] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND TRUE N > 1 [L23] int x[N]; [L24] int temp; [L25] int ret; [L26] int ret2; [L27] int ret5; [L29] int i = 0; VAL [\old(N)=0, i=0, N=2, x={1:0}] [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ VAL [\old(N)=0, i=1, N=2, x={1:0}] [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}] [L34] CALL, EXPR bAnd(x) VAL [\old(N)=0, N=2, x={1:0}] [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 VAL [\old(N)=0, i=1, N=2, res=0, x={1:0}, x={1:0}] [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res & x[i] [L13] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L13] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L16] return res; VAL [\old(N)=0, \result=0, i=2, N=2, res=0, x={1:0}, x={1:0}] [L34] RET, EXPR bAnd(x) VAL [\old(N)=0, bAnd(x)=0, i=2, N=2, x={1:0}] [L34] ret = bAnd(x) [L36] EXPR x[0] [L36] temp=x[0] [L36] EXPR x[1] [L36] x[0] = x[1] [L36] x[1] = temp VAL [\old(N)=0, i=2, N=2, ret=0, temp=0, x={1:0}] [L37] CALL, EXPR bAnd(x) VAL [\old(N)=0, N=2, x={1:0}] [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 VAL [\old(N)=0, i=1, N=2, res=1, x={1:0}, x={1:0}] [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res & x[i] [L13] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L13] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L16] return res; VAL [\old(N)=0, \result=-2, i=2, N=2, res=4294967294, x={1:0}, x={1:0}] [L37] RET, EXPR bAnd(x) VAL [\old(N)=0, bAnd(x)=-2, i=2, N=2, ret=0, temp=0, x={1:0}] [L37] ret2 = bAnd(x) [L38] EXPR x[0] [L38] temp=x[0] [L39] int i =0 ; VAL [\old(N)=0, i=0, i=2, N=2, ret=0, ret2=-2, temp=1, x={1:0}] [L39] COND TRUE i