/usr/bin/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/reducercommutativity/sum60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:04:28,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:04:28,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:04:28,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:04:28,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:04:28,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:04:28,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:04:28,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:04:28,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:04:28,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:04:28,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:04:28,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:04:28,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:04:28,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:04:28,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:04:28,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:04:28,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:04:28,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:04:28,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:04:28,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:04:28,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:04:28,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:04:28,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:04:28,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:04:28,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:04:28,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:04:28,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:04:28,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:04:28,750 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 [2019-11-07 01:04:28,764 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:04:28,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:04:28,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:04:28,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:04:28,766 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:04:28,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:04:28,767 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:04:28,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:04:28,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:04:28,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:04:28,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:04:28,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:04:28,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:04:28,768 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:04:28,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:04:28,768 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:04:28,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:04:28,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:04:28,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:04:28,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:04:28,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:04:28,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:04:28,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:04:28,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:04:28,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:04:28,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:04:28,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:04:28,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:04:28,771 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 [2019-11-07 01:04:29,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:04:29,057 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:04:29,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:04:29,064 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:04:29,064 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:04:29,065 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-11-07 01:04:29,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84632b6f8/cbb5423af36a47afb34cb8763ae3f6e3/FLAG8909ee658 [2019-11-07 01:04:29,618 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:04:29,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum60-2.i [2019-11-07 01:04:29,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84632b6f8/cbb5423af36a47afb34cb8763ae3f6e3/FLAG8909ee658 [2019-11-07 01:04:30,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84632b6f8/cbb5423af36a47afb34cb8763ae3f6e3 [2019-11-07 01:04:30,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:04:30,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:04:30,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:30,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:04:30,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:04:30,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee7042c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30, skipping insertion in model container [2019-11-07 01:04:30,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,081 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:04:30,129 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:04:30,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:30,364 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:04:30,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:30,484 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:04:30,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30 WrapperNode [2019-11-07 01:04:30,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:30,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:04:30,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:04:30,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:04:30,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (1/1) ... [2019-11-07 01:04:30,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:04:30,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:04:30,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:04:30,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:04:30,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (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 [2019-11-07 01:04:30,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:04:30,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:04:30,583 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-07 01:04:30,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:04:30,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:04:30,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:04:30,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:04:30,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:04:30,894 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:04:30,894 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:04:30,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:30 BoogieIcfgContainer [2019-11-07 01:04:30,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:04:30,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:04:30,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:04:30,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:04:30,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:30" (1/3) ... [2019-11-07 01:04:30,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3572caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:30, skipping insertion in model container [2019-11-07 01:04:30,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:30" (2/3) ... [2019-11-07 01:04:30,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3572caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:30, skipping insertion in model container [2019-11-07 01:04:30,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:30" (3/3) ... [2019-11-07 01:04:30,903 INFO L109 eAbstractionObserver]: Analyzing ICFG sum60-2.i [2019-11-07 01:04:30,913 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:04:30,921 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:04:30,932 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:04:30,954 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:04:30,955 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:04:30,955 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:04:30,955 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:04:30,955 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:04:30,955 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:04:30,955 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:04:30,955 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:04:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-07 01:04:30,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:30,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:30,979 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:04:30,981 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:30,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-11-07 01:04:30,994 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:30,995 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308052943] [2019-11-07 01:04:30,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:04:31,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308052943] [2019-11-07 01:04:31,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:31,143 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 01:04:31,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512247980] [2019-11-07 01:04:31,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:31,150 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 01:04:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 01:04:31,168 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-11-07 01:04:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:31,194 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-07 01:04:31,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:31,196 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-11-07 01:04:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:31,206 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:04:31,206 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:04:31,210 INFO L630 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 [2019-11-07 01:04:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:04:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:04:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:04:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-07 01:04:31,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-07 01:04:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:31,253 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-07 01:04:31,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-07 01:04:31,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:31,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:31,256 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:04:31,256 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-11-07 01:04:31,257 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:31,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037353102] [2019-11-07 01:04:31,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:04:31,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037353102] [2019-11-07 01:04:31,341 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:31,341 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:31,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065532296] [2019-11-07 01:04:31,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:31,344 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:31,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:31,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:31,345 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-07 01:04:31,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:31,378 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-07 01:04:31,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:31,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-07 01:04:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:31,380 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:04:31,381 INFO L226 Difference]: Without dead ends: 28 [2019-11-07 01:04:31,382 INFO L630 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 [2019-11-07 01:04:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-07 01:04:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-07 01:04:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:04:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-07 01:04:31,389 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-07 01:04:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:31,390 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-07 01:04:31,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-07 01:04:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:04:31,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:31,392 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:04:31,392 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:31,393 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-11-07 01:04:31,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:31,394 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745455494] [2019-11-07 01:04:31,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:04:31,469 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745455494] [2019-11-07 01:04:31,470 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441807408] [2019-11-07 01:04:31,470 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 [2019-11-07 01:04:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:31,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:04:31,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:04:31,603 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:04:31,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:04:31,662 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:04:31,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397087221] [2019-11-07 01:04:31,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:31,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:31,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:04:31,665 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-07 01:04:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:31,684 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-07 01:04:31,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:31,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-07 01:04:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:31,687 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:04:31,687 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:04:31,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:04:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:04:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-07 01:04:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:04:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-07 01:04:31,703 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-07 01:04:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:31,704 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-07 01:04:31,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-07 01:04:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-07 01:04:31,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:31,710 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:04:31,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:31,911 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-11-07 01:04:31,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:31,912 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415738328] [2019-11-07 01:04:31,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:04:31,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415738328] [2019-11-07 01:04:31,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:31,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:31,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017222661] [2019-11-07 01:04:31,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:31,994 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:31,995 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-07 01:04:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:32,029 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-07 01:04:32,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:32,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-07 01:04:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:32,032 INFO L225 Difference]: With dead ends: 43 [2019-11-07 01:04:32,032 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 01:04:32,033 INFO L630 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 [2019-11-07 01:04:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 01:04:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-07 01:04:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:04:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 01:04:32,042 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-07 01:04:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:32,045 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 01:04:32,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 01:04:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 01:04:32,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:32,049 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:04:32,049 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-11-07 01:04:32,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:32,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470071692] [2019-11-07 01:04:32,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:04:32,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470071692] [2019-11-07 01:04:32,151 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264653080] [2019-11-07 01:04:32,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:32,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:04:32,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:04:32,236 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:04:32,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [329262796] [2019-11-07 01:04:32,292 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 43 [2019-11-07 01:04:32,332 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 01:04:32,333 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 01:04:32,390 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-07 01:04:32,392 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 30 variables. [2019-11-07 01:04:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:32,395 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-07 01:04:32,437 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-11-07 01:04:32,437 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-07 01:04:32,440 INFO L553 sIntCurrentIteration]: We unified 41 AI predicates to 41 [2019-11-07 01:04:32,440 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-07 01:04:32,441 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:04:32,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-11-07 01:04:32,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868147510] [2019-11-07 01:04:32,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:32,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:32,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:04:32,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:04:32,443 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 2 states. [2019-11-07 01:04:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:32,445 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-11-07 01:04:32,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:32,446 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 42 [2019-11-07 01:04:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:32,446 INFO L225 Difference]: With dead ends: 29 [2019-11-07 01:04:32,446 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 01:04:32,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:04:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 01:04:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 01:04:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 01:04:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 01:04:32,448 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2019-11-07 01:04:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:32,448 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 01:04:32,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 01:04:32,449 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 01:04:32,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:32,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 01:04:32,705 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:32,705 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:32,705 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:32,705 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:32,705 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 01:04:32,706 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:32,706 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:32,706 INFO L443 ceAbstractionStarter]: For program point sumEXIT(lines 4 13) no Hoare annotation was computed. [2019-11-07 01:04:32,706 INFO L446 ceAbstractionStarter]: At program point sumENTRY(lines 4 13) the Hoare annotation is: true [2019-11-07 01:04:32,706 INFO L443 ceAbstractionStarter]: For program point L9-2(lines 9 11) no Hoare annotation was computed. [2019-11-07 01:04:32,706 INFO L446 ceAbstractionStarter]: At program point L9-3(lines 9 11) the Hoare annotation is: true [2019-11-07 01:04:32,706 INFO L443 ceAbstractionStarter]: For program point L9-4(lines 9 11) no Hoare annotation was computed. [2019-11-07 01:04:32,707 INFO L443 ceAbstractionStarter]: For program point sumFINAL(lines 4 13) no Hoare annotation was computed. [2019-11-07 01:04:32,711 INFO L443 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2019-11-07 01:04:32,711 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 15 42) no Hoare annotation was computed. [2019-11-07 01:04:32,711 INFO L443 ceAbstractionStarter]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2019-11-07 01:04:32,711 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 25) the Hoare annotation is: false [2019-11-07 01:04:32,712 INFO L439 ceAbstractionStarter]: At program point L23-4(lines 23 25) the Hoare annotation is: false [2019-11-07 01:04:32,712 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 15 42) no Hoare annotation was computed. [2019-11-07 01:04:32,712 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-07 01:04:32,712 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-07 01:04:32,712 INFO L439 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: false [2019-11-07 01:04:32,712 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-07 01:04:32,713 INFO L443 ceAbstractionStarter]: For program point L36-1(line 36) no Hoare annotation was computed. [2019-11-07 01:04:32,713 INFO L439 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: false [2019-11-07 01:04:32,713 INFO L443 ceAbstractionStarter]: For program point L32-2(lines 32 34) no Hoare annotation was computed. [2019-11-07 01:04:32,713 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 15 42) the Hoare annotation is: true [2019-11-07 01:04:32,713 INFO L443 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2019-11-07 01:04:32,714 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 34) the Hoare annotation is: false [2019-11-07 01:04:32,719 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 32 34) no Hoare annotation was computed. [2019-11-07 01:04:32,719 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-07 01:04:32,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:04:32 BoogieIcfgContainer [2019-11-07 01:04:32,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 01:04:32,739 INFO L168 Benchmark]: Toolchain (without parser) took 2717.11 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 103.9 MB in the beginning and 168.2 MB in the end (delta: -64.4 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:32,740 INFO L168 Benchmark]: CDTParser took 1.30 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 01:04:32,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.24 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 180.7 MB in the end (delta: -77.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:32,744 INFO L168 Benchmark]: Boogie Preprocessor took 44.55 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 178.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:32,745 INFO L168 Benchmark]: RCFGBuilder took 364.78 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 161.9 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:32,747 INFO L168 Benchmark]: TraceAbstraction took 1838.83 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 161.3 MB in the beginning and 168.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:32,751 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.30 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 446.24 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 180.7 MB in the end (delta: -77.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.55 ms. Allocated memory is still 201.3 MB. Free memory was 180.0 MB in the beginning and 178.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.78 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 161.9 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1838.83 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 161.3 MB in the beginning and 168.2 MB in the end (delta: -7.0 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 3 SDslu, 78 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 33 PreInvPairs, 33 NumberOfFragments, 11 HoareAnnotationTreeSize, 33 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, 256 NumberOfCodeBlocks, 256 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 323 ConstructedInterpolants, 0 QuantifiedInterpolants, 12829 SizeOfPredicates, 2 NumberOfNonLiveVariables, 273 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 186/205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 104, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9573170731707317, AVG_VARS_REMOVED_DURING_WEAKENING: 1.2439024390243902, AVG_WEAKENED_CONJUNCTS: 0.14634146341463414, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...