/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/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:04:20,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:04:20,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:04:20,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:04:20,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:04:20,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:04:20,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:04:20,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:04:20,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:04:20,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:04:20,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:04:20,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:04:20,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:04:20,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:04:20,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:04:20,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:04:20,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:04:20,679 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:04:20,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:04:20,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:04:20,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:04:20,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:04:20,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:04:20,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:04:20,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:04:20,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:04:20,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:04:20,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:04:20,697 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 01:04:20,710 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:04:20,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:04:20,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:04:20,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:04:20,712 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:04:20,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:04:20,713 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:04:20,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:04:20,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:04:20,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:04:20,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:04:20,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:04:20,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:04:20,714 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:04:20,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:04:20,714 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:04:20,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:04:20,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:04:20,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:04:20,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:04:20,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:04:20,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:04:20,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:04:20,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:04:20,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:04:20,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:04:20,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:04:20,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:04:20,717 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 01:04:21,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:04:21,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:04:21,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:04:21,032 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:04:21,032 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:04:21,033 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-07 01:04:21,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2938e495f/04063a81af704c5a905edc94d9cb9a0a/FLAG6750f243d [2019-11-07 01:04:21,560 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:04:21,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-11-07 01:04:21,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2938e495f/04063a81af704c5a905edc94d9cb9a0a/FLAG6750f243d [2019-11-07 01:04:21,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2938e495f/04063a81af704c5a905edc94d9cb9a0a [2019-11-07 01:04:21,972 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:04:21,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:04:21,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:21,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:04:21,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:04:21,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:21" (1/1) ... [2019-11-07 01:04:21,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175e7e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:21, skipping insertion in model container [2019-11-07 01:04:21,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:21" (1/1) ... [2019-11-07 01:04:21,990 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:04:22,011 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:04:22,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:22,210 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:04:22,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:22,248 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:04:22,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22 WrapperNode [2019-11-07 01:04:22,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:22,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:04:22,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:04:22,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:04:22,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (1/1) ... [2019-11-07 01:04:22,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:04:22,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:04:22,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:04:22,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:04:22,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (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 01:04:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:04:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:04:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-07 01:04:22,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:04:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:04:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:04:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:04:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:04:22,722 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:04:22,722 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:04:22,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:22 BoogieIcfgContainer [2019-11-07 01:04:22,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:04:22,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:04:22,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:04:22,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:04:22,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:21" (1/3) ... [2019-11-07 01:04:22,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa78b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:22, skipping insertion in model container [2019-11-07 01:04:22,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:22" (2/3) ... [2019-11-07 01:04:22,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa78b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:22, skipping insertion in model container [2019-11-07 01:04:22,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:22" (3/3) ... [2019-11-07 01:04:22,732 INFO L109 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2019-11-07 01:04:22,755 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:04:22,768 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:04:22,786 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:04:22,810 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:04:22,811 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:04:22,811 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:04:22,811 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:04:22,811 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:04:22,812 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:04:22,812 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:04:22,812 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:04:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-07 01:04:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:22,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:22,838 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 01:04:22,840 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-11-07 01:04:22,852 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:22,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869603252] [2019-11-07 01:04:22,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:22,996 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 01:04:22,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869603252] [2019-11-07 01:04:22,998 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:22,998 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 01:04:22,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334099957] [2019-11-07 01:04:23,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:23,005 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:23,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 01:04:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 01:04:23,023 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-07 01:04:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:23,050 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-11-07 01:04:23,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:23,052 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-11-07 01:04:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:23,063 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:04:23,063 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 01:04:23,067 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 01:04:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 01:04:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-07 01:04:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:04:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-07 01:04:23,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-11-07 01:04:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:23,114 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-07 01:04:23,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-07 01:04:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:23,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:23,117 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 01:04:23,118 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-11-07 01:04:23,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:23,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567962303] [2019-11-07 01:04:23,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:23,197 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 01:04:23,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567962303] [2019-11-07 01:04:23,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:23,199 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:23,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099934643] [2019-11-07 01:04:23,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:23,202 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:23,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:23,203 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-11-07 01:04:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:23,231 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-07 01:04:23,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:23,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-07 01:04:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:23,233 INFO L225 Difference]: With dead ends: 48 [2019-11-07 01:04:23,233 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:04:23,235 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 01:04:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:04:23,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-07 01:04:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:04:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-07 01:04:23,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-11-07 01:04:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:23,244 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-07 01:04:23,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-07 01:04:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:04:23,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:23,246 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 01:04:23,246 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-11-07 01:04:23,247 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:23,247 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392348602] [2019-11-07 01:04:23,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:23,337 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 01:04:23,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392348602] [2019-11-07 01:04:23,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395855156] [2019-11-07 01:04:23,339 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 01:04:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:23,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:04:23,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:23,497 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 01:04:23,498 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:23,541 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 01:04:23,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:04:23,542 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:04:23,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500193316] [2019-11-07 01:04:23,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:23,543 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:04:23,544 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-11-07 01:04:23,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:23,567 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-11-07 01:04:23,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:23,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-07 01:04:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:23,571 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:04:23,571 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:04:23,572 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 01:04:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:04:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-07 01:04:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:04:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-07 01:04:23,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-11-07 01:04:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:23,580 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-07 01:04:23,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-07 01:04:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:04:23,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:23,582 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 01:04:23,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:23,786 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-11-07 01:04:23,789 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:23,789 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691994567] [2019-11-07 01:04:23,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:23,903 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 01:04:23,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691994567] [2019-11-07 01:04:23,905 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:23,905 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:23,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517314175] [2019-11-07 01:04:23,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:23,907 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:23,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:23,909 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-11-07 01:04:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:23,934 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-07 01:04:23,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:23,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-07 01:04:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:23,936 INFO L225 Difference]: With dead ends: 45 [2019-11-07 01:04:23,936 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:04:23,937 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 01:04:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:04:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-07 01:04:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:04:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-07 01:04:23,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-11-07 01:04:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:23,953 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-07 01:04:23,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-07 01:04:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 01:04:23,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:23,959 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 01:04:23,959 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:23,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-11-07 01:04:23,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:23,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996861637] [2019-11-07 01:04:23,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:24,070 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 01:04:24,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996861637] [2019-11-07 01:04:24,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939351729] [2019-11-07 01:04:24,071 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 01:04:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:24,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:04:24,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:24,188 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 01:04:24,188 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:24,239 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 01:04:24,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [608101018] [2019-11-07 01:04:24,247 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 46 [2019-11-07 01:04:24,293 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 01:04:24,294 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 01:04:24,361 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-07 01:04:24,363 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 01:04:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:24,367 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-07 01:04:24,410 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-11-07 01:04:24,410 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-07 01:04:24,412 INFO L553 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2019-11-07 01:04:24,412 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-07 01:04:24,413 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:04:24,413 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-11-07 01:04:24,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545537880] [2019-11-07 01:04:24,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:24,415 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:04:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:04:24,415 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-11-07 01:04:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:24,418 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-07 01:04:24,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:24,418 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2019-11-07 01:04:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:24,419 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:04:24,419 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 01:04:24,419 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 01:04:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 01:04:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 01:04:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 01:04:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 01:04:24,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-11-07 01:04:24,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:24,421 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 01:04:24,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 01:04:24,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 01:04:24,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:24,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 01:04:24,662 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:24,663 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:24,663 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:24,663 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:24,663 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 01:04:24,664 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:24,664 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:24,664 INFO L439 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: false [2019-11-07 01:04:24,664 INFO L443 ceAbstractionStarter]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2019-11-07 01:04:24,664 INFO L443 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2019-11-07 01:04:24,664 INFO L439 ceAbstractionStarter]: At program point L35-3(lines 35 37) the Hoare annotation is: false [2019-11-07 01:04:24,664 INFO L443 ceAbstractionStarter]: For program point L35-4(lines 35 37) no Hoare annotation was computed. [2019-11-07 01:04:24,665 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2019-11-07 01:04:24,665 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2019-11-07 01:04:24,665 INFO L443 ceAbstractionStarter]: For program point L42(line 42) no Hoare annotation was computed. [2019-11-07 01:04:24,665 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-11-07 01:04:24,665 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2019-11-07 01:04:24,665 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-07 01:04:24,665 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-11-07 01:04:24,666 INFO L439 ceAbstractionStarter]: At program point L26-4(lines 26 28) the Hoare annotation is: false [2019-11-07 01:04:24,666 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed. [2019-11-07 01:04:24,666 INFO L439 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: false [2019-11-07 01:04:24,666 INFO L443 ceAbstractionStarter]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2019-11-07 01:04:24,666 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-11-07 01:04:24,666 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2019-11-07 01:04:24,666 INFO L443 ceAbstractionStarter]: For program point sepFINAL(lines 4 15) no Hoare annotation was computed. [2019-11-07 01:04:24,667 INFO L446 ceAbstractionStarter]: At program point sepENTRY(lines 4 15) the Hoare annotation is: true [2019-11-07 01:04:24,667 INFO L443 ceAbstractionStarter]: For program point sepEXIT(lines 4 15) no Hoare annotation was computed. [2019-11-07 01:04:24,667 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 12) no Hoare annotation was computed. [2019-11-07 01:04:24,667 INFO L443 ceAbstractionStarter]: For program point L7-2(lines 7 13) no Hoare annotation was computed. [2019-11-07 01:04:24,667 INFO L446 ceAbstractionStarter]: At program point L7-3(lines 7 13) the Hoare annotation is: true [2019-11-07 01:04:24,667 INFO L443 ceAbstractionStarter]: For program point L7-4(lines 7 13) no Hoare annotation was computed. [2019-11-07 01:04:24,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:04:24 BoogieIcfgContainer [2019-11-07 01:04:24,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 01:04:24,678 INFO L168 Benchmark]: Toolchain (without parser) took 2704.17 ms. Allocated memory was 145.2 MB in the beginning and 235.4 MB in the end (delta: 90.2 MB). Free memory was 103.3 MB in the beginning and 164.3 MB in the end (delta: -61.0 MB). Peak memory consumption was 29.2 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:24,679 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.2 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 01:04:24,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.37 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:24,681 INFO L168 Benchmark]: Boogie Preprocessor took 132.87 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.7 MB in the beginning and 179.1 MB in the end (delta: -86.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:24,682 INFO L168 Benchmark]: RCFGBuilder took 339.12 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 162.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:24,683 INFO L168 Benchmark]: TraceAbstraction took 1951.05 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 162.0 MB in the beginning and 164.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 30.8 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:24,688 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.2 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 274.37 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.87 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.7 MB in the beginning and 179.1 MB in the end (delta: -86.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.12 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 162.7 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1951.05 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 162.0 MB in the beginning and 164.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 30.8 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: 1.8s, 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, 0.2s SatisfiabilityAnalysisTime, 0.4s 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]: 120, 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...