/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/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:04:22,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:04:22,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:04:22,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:04:22,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:04:22,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:04:22,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:04:22,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:04:22,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:04:22,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:04:22,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:04:22,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:04:22,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:04:22,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:04:22,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:04:22,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:04:22,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:04:22,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:04:22,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:04:22,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:04:22,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:04:22,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:04:22,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:04:22,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:04:22,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:04:22,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:04:22,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:04:22,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:04:22,585 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 01:04:22,618 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:04:22,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:04:22,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:04:22,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:04:22,623 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:04:22,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:04:22,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:04:22,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:04:22,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:04:22,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:04:22,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:04:22,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:04:22,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:04:22,628 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:04:22,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:04:22,628 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:04:22,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:04:22,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:04:22,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:04:22,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:04:22,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:04:22,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:04:22,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:04:22,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:04:22,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:04:22,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:04:22,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:04:22,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:04:22,634 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 01:04:22,944 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:04:22,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:04:22,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:04:22,963 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:04:22,963 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:04:22,964 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-11-07 01:04:23,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cac2ccd/4d242e22c259482d8cce4f432862cba3/FLAGcf8834aae [2019-11-07 01:04:23,468 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:04:23,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-11-07 01:04:23,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cac2ccd/4d242e22c259482d8cce4f432862cba3/FLAGcf8834aae [2019-11-07 01:04:23,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78cac2ccd/4d242e22c259482d8cce4f432862cba3 [2019-11-07 01:04:23,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:04:23,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:04:23,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:23,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:04:23,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:04:23,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:23" (1/1) ... [2019-11-07 01:04:23,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26511545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:23, skipping insertion in model container [2019-11-07 01:04:23,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:23" (1/1) ... [2019-11-07 01:04:23,890 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:04:23,916 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:04:24,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:24,183 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:04:24,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:24,322 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:04:24,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24 WrapperNode [2019-11-07 01:04:24,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:24,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:04:24,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:04:24,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:04:24,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... [2019-11-07 01:04:24,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:04:24,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:04:24,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:04:24,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:04:24,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:04:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:04:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:04:24,429 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-07 01:04:24,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:04:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:04:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:04:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-07 01:04:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:04:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:04:24,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:04:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:04:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:04:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:04:24,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:04:24,767 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:04:24,768 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:04:24,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:24 BoogieIcfgContainer [2019-11-07 01:04:24,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:04:24,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:04:24,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:04:24,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:04:24,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:23" (1/3) ... [2019-11-07 01:04:24,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2b015b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:24, skipping insertion in model container [2019-11-07 01:04:24,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:24" (2/3) ... [2019-11-07 01:04:24,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2b015b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:24, skipping insertion in model container [2019-11-07 01:04:24,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:24" (3/3) ... [2019-11-07 01:04:24,779 INFO L109 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2019-11-07 01:04:24,789 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:04:24,797 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:04:24,809 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:04:24,838 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:04:24,839 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:04:24,839 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:04:24,839 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:04:24,839 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:04:24,839 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:04:24,840 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:04:24,840 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:04:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-07 01:04:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:24,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:24,865 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 01:04:24,867 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-11-07 01:04:24,879 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:24,879 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556878997] [2019-11-07 01:04:24,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:25,027 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 01:04:25,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556878997] [2019-11-07 01:04:25,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:25,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 01:04:25,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098921588] [2019-11-07 01:04:25,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:25,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 01:04:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 01:04:25,054 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-07 01:04:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:25,081 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-11-07 01:04:25,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:25,083 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-11-07 01:04:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:25,092 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:04:25,093 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 01:04:25,097 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 01:04:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 01:04:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-07 01:04:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:04:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-07 01:04:25,145 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-11-07 01:04:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:25,146 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-07 01:04:25,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-07 01:04:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:25,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:25,149 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 01:04:25,150 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-11-07 01:04:25,151 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:25,151 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033957076] [2019-11-07 01:04:25,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:25,271 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 01:04:25,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033957076] [2019-11-07 01:04:25,272 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:25,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:25,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185548916] [2019-11-07 01:04:25,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:25,277 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:25,277 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-11-07 01:04:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:25,312 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-07 01:04:25,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:25,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-07 01:04:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:25,314 INFO L225 Difference]: With dead ends: 48 [2019-11-07 01:04:25,315 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:04:25,316 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 01:04:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:04:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-07 01:04:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:04:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-07 01:04:25,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-11-07 01:04:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:25,326 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-07 01:04:25,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-07 01:04:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:04:25,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:25,328 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 01:04:25,329 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-11-07 01:04:25,329 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:25,330 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321319294] [2019-11-07 01:04:25,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:25,396 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 01:04:25,396 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321319294] [2019-11-07 01:04:25,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245132693] [2019-11-07 01:04:25,397 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 01:04:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:25,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:04:25,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:25,514 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 01:04:25,514 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:25,572 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 01:04:25,573 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:04:25,573 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:04:25,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576301566] [2019-11-07 01:04:25,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:25,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:25,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:04:25,576 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-11-07 01:04:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:25,600 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-11-07 01:04:25,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:25,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-07 01:04:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:25,602 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:04:25,603 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:04:25,603 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 01:04:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:04:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-07 01:04:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:04:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-07 01:04:25,613 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-11-07 01:04:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:25,614 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-07 01:04:25,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-07 01:04:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:04:25,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:25,616 INFO L410 BasicCegarLoop]: trace histogram [3, 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 01:04:25,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:25,821 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-11-07 01:04:25,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:25,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030141096] [2019-11-07 01:04:25,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:26,110 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030141096] [2019-11-07 01:04:26,111 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:26,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:26,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819291954] [2019-11-07 01:04:26,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:26,112 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:26,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:26,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:26,113 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-11-07 01:04:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:26,143 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-07 01:04:26,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:26,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-07 01:04:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:26,145 INFO L225 Difference]: With dead ends: 45 [2019-11-07 01:04:26,145 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:04:26,146 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 01:04:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:04:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-07 01:04:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:04:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-07 01:04:26,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-11-07 01:04:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:26,159 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-07 01:04:26,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-07 01:04:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 01:04:26,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:26,167 INFO L410 BasicCegarLoop]: trace histogram [3, 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 01:04:26,169 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:26,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-11-07 01:04:26,171 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:26,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601460110] [2019-11-07 01:04:26,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:26,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601460110] [2019-11-07 01:04:26,307 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299951423] [2019-11-07 01:04:26,307 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 01:04:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:26,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:04:26,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:26,393 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:26,429 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1629630871] [2019-11-07 01:04:26,435 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 46 [2019-11-07 01:04:26,480 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 01:04:26,480 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 01:04:26,557 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-07 01:04:26,559 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 01:04:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:26,562 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-07 01:04:26,646 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-11-07 01:04:26,647 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-07 01:04:26,652 INFO L553 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2019-11-07 01:04:26,654 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-07 01:04:26,655 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:04:26,655 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-11-07 01:04:26,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830503909] [2019-11-07 01:04:26,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:26,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:04:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:04:26,657 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-11-07 01:04:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:26,664 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-07 01:04:26,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:26,666 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2019-11-07 01:04:26,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:26,667 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:04:26,667 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 01:04:26,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 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 01:04:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 01:04:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 01:04:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 01:04:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 01:04:26,669 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-11-07 01:04:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:26,670 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 01:04:26,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 01:04:26,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 01:04:26,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:26,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 01:04:26,919 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:26,919 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:26,919 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:26,919 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:26,919 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 01:04:26,920 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:26,920 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:26,920 INFO L439 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: false [2019-11-07 01:04:26,920 INFO L443 ceAbstractionStarter]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2019-11-07 01:04:26,920 INFO L443 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2019-11-07 01:04:26,920 INFO L439 ceAbstractionStarter]: At program point L35-3(lines 35 37) the Hoare annotation is: false [2019-11-07 01:04:26,920 INFO L443 ceAbstractionStarter]: For program point L35-4(lines 35 37) no Hoare annotation was computed. [2019-11-07 01:04:26,921 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2019-11-07 01:04:26,925 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2019-11-07 01:04:26,925 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2019-11-07 01:04:26,925 INFO L443 ceAbstractionStarter]: For program point L42(line 42) no Hoare annotation was computed. [2019-11-07 01:04:26,925 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-11-07 01:04:26,925 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2019-11-07 01:04:26,926 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-07 01:04:26,927 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-11-07 01:04:26,927 INFO L439 ceAbstractionStarter]: At program point L26-4(lines 26 28) the Hoare annotation is: false [2019-11-07 01:04:26,927 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed. [2019-11-07 01:04:26,927 INFO L439 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: false [2019-11-07 01:04:26,928 INFO L443 ceAbstractionStarter]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2019-11-07 01:04:26,928 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-11-07 01:04:26,928 INFO L443 ceAbstractionStarter]: For program point sepFINAL(lines 4 15) no Hoare annotation was computed. [2019-11-07 01:04:26,928 INFO L446 ceAbstractionStarter]: At program point sepENTRY(lines 4 15) the Hoare annotation is: true [2019-11-07 01:04:26,928 INFO L443 ceAbstractionStarter]: For program point sepEXIT(lines 4 15) no Hoare annotation was computed. [2019-11-07 01:04:26,928 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 12) no Hoare annotation was computed. [2019-11-07 01:04:26,928 INFO L443 ceAbstractionStarter]: For program point L7-2(lines 7 13) no Hoare annotation was computed. [2019-11-07 01:04:26,928 INFO L446 ceAbstractionStarter]: At program point L7-3(lines 7 13) the Hoare annotation is: true [2019-11-07 01:04:26,929 INFO L443 ceAbstractionStarter]: For program point L7-4(lines 7 13) no Hoare annotation was computed. [2019-11-07 01:04:26,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:04:26 BoogieIcfgContainer [2019-11-07 01:04:26,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 01:04:26,943 INFO L168 Benchmark]: Toolchain (without parser) took 3071.21 ms. Allocated memory was 144.7 MB in the beginning and 234.4 MB in the end (delta: 89.7 MB). Free memory was 102.8 MB in the beginning and 164.9 MB in the end (delta: -62.1 MB). Peak memory consumption was 27.5 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:26,944 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 01:04:26,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.51 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.6 MB in the beginning and 181.1 MB in the end (delta: -78.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:26,950 INFO L168 Benchmark]: Boogie Preprocessor took 45.43 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:26,952 INFO L168 Benchmark]: RCFGBuilder took 400.42 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 162.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:26,953 INFO L168 Benchmark]: TraceAbstraction took 2168.85 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 162.0 MB in the beginning and 164.9 MB in the end (delta: -2.9 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:26,960 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 451.51 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.6 MB in the beginning and 181.1 MB in the end (delta: -78.5 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.43 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.42 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 162.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2168.85 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 162.0 MB in the beginning and 164.9 MB in the end (delta: -2.9 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Result: SAFE, OverallTime: 2.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 5 SDslu, 84 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 4 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, 0.3s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 265 NumberOfCodeBlocks, 265 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 13897 SizeOfPredicates, 2 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 198/217 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 127, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9602272727272727, AVG_VARS_REMOVED_DURING_WEAKENING: 1.2272727272727273, AVG_WEAKENED_CONJUNCTS: 0.13636363636363635, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...