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/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:52:02,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:52:02,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:52:02,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:52:02,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:52:02,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:52:02,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:52:02,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:52:02,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:52:02,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:52:02,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:52:02,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:52:02,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:52:02,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:52:02,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:52:02,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:52:02,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:52:02,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:52:02,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:52:02,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:52:02,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:52:02,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:52:02,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:52:02,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:52:02,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:52:02,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:52:02,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:52:02,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:52:02,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:52:02,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:52:02,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:52:02,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:52:02,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:52:02,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:52:02,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:52:02,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:52:02,110 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 [2019-10-14 23:52:02,136 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:52:02,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:52:02,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:52:02,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:52:02,138 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:52:02,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:52:02,138 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:52:02,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:52:02,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:52:02,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:52:02,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:52:02,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:52:02,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:52:02,139 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:52:02,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:52:02,140 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:52:02,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:52:02,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:52:02,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:52:02,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:52:02,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:52:02,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:52:02,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:52:02,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:52:02,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:52:02,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:52:02,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:52:02,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:52:02,142 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 [2019-10-14 23:52:02,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:52:02,422 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:52:02,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:52:02,428 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:52:02,429 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:52:02,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-14 23:52:02,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b76e6f3c/a791e1b80e734d5497c121d99aeaecc8/FLAGe47414d4f [2019-10-14 23:52:02,995 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:52:02,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-14 23:52:03,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b76e6f3c/a791e1b80e734d5497c121d99aeaecc8/FLAGe47414d4f [2019-10-14 23:52:03,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b76e6f3c/a791e1b80e734d5497c121d99aeaecc8 [2019-10-14 23:52:03,418 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:52:03,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:52:03,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:52:03,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:52:03,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:52:03,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6553a585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03, skipping insertion in model container [2019-10-14 23:52:03,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,436 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:52:03,460 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:52:03,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:52:03,684 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:52:03,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:52:03,725 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:52:03,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03 WrapperNode [2019-10-14 23:52:03,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:52:03,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:52:03,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:52:03,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:52:03,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (1/1) ... [2019-10-14 23:52:03,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:52:03,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:52:03,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:52:03,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:52:03,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (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 [2019-10-14 23:52:03,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:52:03,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:52:03,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:52:03,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:52:03,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:52:03,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:52:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:52:03,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:52:04,183 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:52:04,183 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:52:04,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:04 BoogieIcfgContainer [2019-10-14 23:52:04,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:52:04,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:52:04,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:52:04,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:52:04,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:52:03" (1/3) ... [2019-10-14 23:52:04,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603ca687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:04, skipping insertion in model container [2019-10-14 23:52:04,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:03" (2/3) ... [2019-10-14 23:52:04,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@603ca687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:04, skipping insertion in model container [2019-10-14 23:52:04,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:04" (3/3) ... [2019-10-14 23:52:04,195 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-10-14 23:52:04,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:52:04,214 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:52:04,225 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:52:04,250 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:52:04,250 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:52:04,250 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:52:04,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:52:04,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:52:04,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:52:04,251 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:52:04,251 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:52:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:52:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:52:04,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:04,272 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:04,273 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-10-14 23:52:04,284 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:04,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8216322] [2019-10-14 23:52:04,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:52:04,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8216322] [2019-10-14 23:52:04,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:04,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:52:04,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959236083] [2019-10-14 23:52:04,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:52:04,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:52:04,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:04,429 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-14 23:52:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:04,455 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-10-14 23:52:04,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:52:04,457 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-14 23:52:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:04,465 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:52:04,466 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:52:04,469 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 [2019-10-14 23:52:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:52:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:52:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:52:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:52:04,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-14 23:52:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:04,507 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:52:04,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:52:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:52:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:52:04,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:04,509 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:04,509 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-10-14 23:52:04,510 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:04,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984071302] [2019-10-14 23:52:04,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:52:04,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984071302] [2019-10-14 23:52:04,567 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:04,567 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:52:04,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814903767] [2019-10-14 23:52:04,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:52:04,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:04,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:52:04,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:04,571 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:52:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:04,619 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 23:52:04,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:52:04,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 23:52:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:04,621 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:52:04,621 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:52:04,622 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 [2019-10-14 23:52:04,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:52:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:52:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:52:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:52:04,629 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-10-14 23:52:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:04,629 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:52:04,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:52:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:52:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:52:04,630 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:04,631 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:04,631 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-10-14 23:52:04,632 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:04,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132698766] [2019-10-14 23:52:04,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,633 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:04,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132698766] [2019-10-14 23:52:04,696 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:04,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:52:04,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990524745] [2019-10-14 23:52:04,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:52:04,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:52:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:52:04,699 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-14 23:52:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:04,769 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-10-14 23:52:04,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:52:04,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 23:52:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:04,771 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:52:04,771 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:52:04,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:52:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:52:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-14 23:52:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:52:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:52:04,779 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-10-14 23:52:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:04,780 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:52:04,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:52:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:52:04,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:52:04,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:04,781 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:04,781 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-10-14 23:52:04,782 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:04,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219490437] [2019-10-14 23:52:04,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:04,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:04,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219490437] [2019-10-14 23:52:04,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:04,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:52:04,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099428075] [2019-10-14 23:52:04,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:52:04,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:52:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:52:04,873 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-10-14 23:52:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:05,022 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-14 23:52:05,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:52:05,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-14 23:52:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:05,024 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:52:05,025 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:52:05,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:52:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:52:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-14 23:52:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:52:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-14 23:52:05,033 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-10-14 23:52:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:05,034 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-14 23:52:05,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:52:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-14 23:52:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:52:05,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:05,035 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:05,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-10-14 23:52:05,036 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:05,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113425359] [2019-10-14 23:52:05,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:05,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:05,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:52:05,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113425359] [2019-10-14 23:52:05,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122931168] [2019-10-14 23:52:05,203 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 [2019-10-14 23:52:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:05,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:52:05,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:52:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:52:05,368 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:52:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:52:05,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1819282796] [2019-10-14 23:52:05,427 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 27 [2019-10-14 23:52:05,472 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:52:05,473 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-14 23:52:05,553 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-14 23:52:05,554 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 27 variables. [2019-10-14 23:52:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:05,558 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-14 23:52:05,594 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-14 23:52:05,594 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-14 23:52:05,596 INFO L553 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2019-10-14 23:52:05,596 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-14 23:52:05,597 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-14 23:52:05,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 5, 5] total 13 [2019-10-14 23:52:05,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693042019] [2019-10-14 23:52:05,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:52:05,599 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:05,599 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-14 23:52:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:52:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:05,600 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 2 states. [2019-10-14 23:52:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:05,602 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-10-14 23:52:05,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:52:05,603 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2019-10-14 23:52:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:05,603 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:52:05,603 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:52:05,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:05,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:52:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:52:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:52:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:52:05,605 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2019-10-14 23:52:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:05,605 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:52:05,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:52:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:52:05,606 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:52:05,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:52:05,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:52:05,839 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:52:05,840 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:52:05,840 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:52:05,840 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:52:05,840 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:52:05,840 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:52:05,841 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:52:05,841 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: false [2019-10-14 23:52:05,841 INFO L443 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2019-10-14 23:52:05,841 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 32) no Hoare annotation was computed. [2019-10-14 23:52:05,841 INFO L443 ceAbstractionStarter]: For program point L16-2(lines 16 20) no Hoare annotation was computed. [2019-10-14 23:52:05,841 INFO L439 ceAbstractionStarter]: At program point L16-3(lines 16 20) the Hoare annotation is: false [2019-10-14 23:52:05,841 INFO L443 ceAbstractionStarter]: For program point L25-2(lines 25 29) no Hoare annotation was computed. [2019-10-14 23:52:05,841 INFO L439 ceAbstractionStarter]: At program point L25-3(lines 25 29) the Hoare annotation is: false [2019-10-14 23:52:05,842 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2019-10-14 23:52:05,842 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 32) no Hoare annotation was computed. [2019-10-14 23:52:05,842 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 32) the Hoare annotation is: true [2019-10-14 23:52:05,842 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-10-14 23:52:05,842 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-10-14 23:52:05,842 INFO L443 ceAbstractionStarter]: For program point L22(lines 22 30) no Hoare annotation was computed. [2019-10-14 23:52:05,843 INFO L443 ceAbstractionStarter]: For program point L14-2(lines 14 21) no Hoare annotation was computed. [2019-10-14 23:52:05,843 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 21) the Hoare annotation is: false [2019-10-14 23:52:05,843 INFO L443 ceAbstractionStarter]: For program point L14-4(lines 5 32) no Hoare annotation was computed. [2019-10-14 23:52:05,843 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2019-10-14 23:52:05,843 INFO L439 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: false [2019-10-14 23:52:05,843 INFO L443 ceAbstractionStarter]: For program point L10-4(lines 10 13) no Hoare annotation was computed. [2019-10-14 23:52:05,843 INFO L443 ceAbstractionStarter]: For program point L2-1(line 2) no Hoare annotation was computed. [2019-10-14 23:52:05,844 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2019-10-14 23:52:05,844 INFO L443 ceAbstractionStarter]: For program point L2-3(line 2) no Hoare annotation was computed. [2019-10-14 23:52:05,844 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2019-10-14 23:52:05,844 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2019-10-14 23:52:05,844 INFO L443 ceAbstractionStarter]: For program point L2(line 2) no Hoare annotation was computed. [2019-10-14 23:52:05,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:52:05 BoogieIcfgContainer [2019-10-14 23:52:05,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:52:05,857 INFO L168 Benchmark]: Toolchain (without parser) took 2435.97 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 103.2 MB in the beginning and 178.2 MB in the end (delta: -74.9 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:05,858 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-14 23:52:05,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.05 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:05,860 INFO L168 Benchmark]: Boogie Preprocessor took 119.56 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 179.0 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:05,860 INFO L168 Benchmark]: RCFGBuilder took 339.04 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 163.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:05,862 INFO L168 Benchmark]: TraceAbstraction took 1667.23 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 162.6 MB in the beginning and 178.2 MB in the end (delta: -15.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:05,866 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.05 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.56 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 179.0 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.04 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 163.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1667.23 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 162.6 MB in the beginning and 178.2 MB in the end (delta: -15.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Result: SAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 18 SDslu, 128 SDs, 0 SdLazy, 84 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, 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, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 15 NumberOfFragments, 11 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 4822 SizeOfPredicates, 1 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 12/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 132, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.96, AVG_VARS_REMOVED_DURING_WEAKENING: 0.88, AVG_WEAKENED_CONJUNCTS: 0.24, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...