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/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:13,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:13,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:13,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:13,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:13,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:13,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:13,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:13,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:13,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:13,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:13,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:13,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:13,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:13,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:13,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:13,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:13,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:13,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:13,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:13,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:13,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:13,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:13,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:13,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:06:13,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:13,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:13,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:13,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:06:13,917 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:13,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:13,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:13,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:13,919 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:13,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:13,919 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:13,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:13,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:13,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:13,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:13,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:13,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:13,920 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:13,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:13,921 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:13,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:13,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:13,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:13,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:13,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:13,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:13,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:13,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:13,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:13,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:13,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:13,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:13,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:06:14,180 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:14,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:14,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:14,197 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:14,197 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:14,198 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2019-10-15 01:06:14,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acf48fb5f/83e00fc6d48248b2b8e1ae20df17a802/FLAGffe7e3854 [2019-10-15 01:06:14,669 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:14,672 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2019-10-15 01:06:14,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acf48fb5f/83e00fc6d48248b2b8e1ae20df17a802/FLAGffe7e3854 [2019-10-15 01:06:15,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acf48fb5f/83e00fc6d48248b2b8e1ae20df17a802 [2019-10-15 01:06:15,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:15,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:15,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:15,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:15,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:15,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8a10c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15, skipping insertion in model container [2019-10-15 01:06:15,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,109 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:15,123 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:15,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:15,301 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:15,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:15,338 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:15,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15 WrapperNode [2019-10-15 01:06:15,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:15,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:15,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:15,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:15,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:15,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:15,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:15,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:15,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:15,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:15,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:15,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:15,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:06:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:15,672 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:15,672 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:15,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:15 BoogieIcfgContainer [2019-10-15 01:06:15,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:15,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:15,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:15,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:15,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:15" (1/3) ... [2019-10-15 01:06:15,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc871c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:15, skipping insertion in model container [2019-10-15 01:06:15,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (2/3) ... [2019-10-15 01:06:15,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc871c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:15, skipping insertion in model container [2019-10-15 01:06:15,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:15" (3/3) ... [2019-10-15 01:06:15,681 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2019-10-15 01:06:15,700 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:15,712 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:15,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:15,809 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:15,809 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:15,809 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:15,809 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:15,810 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:15,810 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:15,810 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:15,810 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:06:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:06:15,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:15,837 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:15,841 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1345568573, now seen corresponding path program 1 times [2019-10-15 01:06:15,855 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:15,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963851010] [2019-10-15 01:06:15,856 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:15,856 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:15,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963851010] [2019-10-15 01:06:16,210 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:16,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:06:16,211 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644634161] [2019-10-15 01:06:16,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:06:16,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:06:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:06:16,233 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-10-15 01:06:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:16,350 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2019-10-15 01:06:16,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:06:16,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-10-15 01:06:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:16,361 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:06:16,361 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:06:16,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:06:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-15 01:06:16,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:06:16,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-15 01:06:16,408 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2019-10-15 01:06:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:16,409 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-15 01:06:16,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:06:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-15 01:06:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:06:16,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:16,411 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:16,413 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:16,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1402826875, now seen corresponding path program 1 times [2019-10-15 01:06:16,415 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:16,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970555736] [2019-10-15 01:06:16,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,415 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970555736] [2019-10-15 01:06:16,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:16,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:06:16,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255931217] [2019-10-15 01:06:16,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:16,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:16,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:06:16,502 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2019-10-15 01:06:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:16,550 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2019-10-15 01:06:16,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:16,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-15 01:06:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:16,555 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:06:16,555 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:06:16,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:06:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:06:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 01:06:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:06:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-15 01:06:16,573 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2019-10-15 01:06:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:16,574 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-15 01:06:16,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-15 01:06:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:06:16,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:16,576 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:16,576 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1436486517, now seen corresponding path program 1 times [2019-10-15 01:06:16,577 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:16,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020791698] [2019-10-15 01:06:16,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,579 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020791698] [2019-10-15 01:06:16,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344197640] [2019-10-15 01:06:16,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:06:16,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,822 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1601806622] [2019-10-15 01:06:16,879 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 21 [2019-10-15 01:06:16,924 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:16,925 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:16,980 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:06:17,540 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:17,552 INFO L272 AbstractInterpreter]: Visited 16 different actions 133 times. Merged at 5 different actions 38 times. Widened at 1 different actions 3 times. Performed 201 root evaluator evaluations with a maximum evaluation depth of 8. Performed 201 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 9 fixpoints after 3 different actions. Largest state had 7 variables. [2019-10-15 01:06:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:17,557 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:17,566 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:06:17,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:06:17,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115197688] [2019-10-15 01:06:17,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:06:17,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:17,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:06:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:06:17,570 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-15 01:06:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:17,654 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2019-10-15 01:06:17,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:17,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-15 01:06:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:17,656 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:06:17,657 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:06:17,658 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:06:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-10-15 01:06:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:06:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-10-15 01:06:17,680 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2019-10-15 01:06:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:17,682 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-10-15 01:06:17,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:06:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-10-15 01:06:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:06:17,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:17,687 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:17,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:17,899 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash 103432291, now seen corresponding path program 2 times [2019-10-15 01:06:17,900 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:17,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091360784] [2019-10-15 01:06:17,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:17,901 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:17,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:06:18,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091360784] [2019-10-15 01:06:18,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971739987] [2019-10-15 01:06:18,062 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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