java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:00,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:00,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:00,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:00,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:00,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:00,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:00,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:00,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:00,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:00,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:00,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:00,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:00,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:00,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:00,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:00,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:00,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:00,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:00,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:00,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:00,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:00,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:00,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:00,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:06:00,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:00,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:00,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:00,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:06:00,946 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:00,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:00,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:00,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:00,951 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:00,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:00,951 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:00,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:00,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:00,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:00,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:00,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:00,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:00,953 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:00,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:00,953 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:00,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:00,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:00,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:00,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:00,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:00,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:00,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:00,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:00,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:00,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:00,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:00,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:00,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:06:01,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:01,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:01,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:01,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:01,250 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:01,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2019-10-15 01:06:01,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f2fce6a/ea36ec9f1b7a432d9ce6854195b6035e/FLAG69ae590d1 [2019-10-15 01:06:01,848 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:01,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2019-10-15 01:06:01,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f2fce6a/ea36ec9f1b7a432d9ce6854195b6035e/FLAG69ae590d1 [2019-10-15 01:06:02,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f2fce6a/ea36ec9f1b7a432d9ce6854195b6035e [2019-10-15 01:06:02,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:02,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:02,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:02,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:02,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:02,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b04d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02, skipping insertion in model container [2019-10-15 01:06:02,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,284 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:02,302 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:02,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:02,525 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:02,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:02,680 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:02,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02 WrapperNode [2019-10-15 01:06:02,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:02,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:02,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:02,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:02,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... [2019-10-15 01:06:02,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:02,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:02,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:02,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:02,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:02,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:02,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:02,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:06:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:06:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-15 01:06:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:02,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:06:03,033 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:03,033 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:06:03,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:03 BoogieIcfgContainer [2019-10-15 01:06:03,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:03,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:03,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:03,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:03,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:02" (1/3) ... [2019-10-15 01:06:03,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5eaf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:03, skipping insertion in model container [2019-10-15 01:06:03,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:02" (2/3) ... [2019-10-15 01:06:03,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5eaf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:03, skipping insertion in model container [2019-10-15 01:06:03,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:03" (3/3) ... [2019-10-15 01:06:03,066 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2019-10-15 01:06:03,086 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:03,094 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:03,110 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:03,143 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:03,144 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:03,144 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:03,144 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:03,144 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:03,144 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:03,145 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:03,145 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:06:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 01:06:03,164 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:03,165 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:03,167 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:03,171 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2019-10-15 01:06:03,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:03,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142838112] [2019-10-15 01:06:03,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:03,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:03,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:03,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142838112] [2019-10-15 01:06:03,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:03,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:03,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137974470] [2019-10-15 01:06:03,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:03,328 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:03,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:03,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:03,352 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-15 01:06:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:03,376 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-10-15 01:06:03,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:03,377 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-15 01:06:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:03,387 INFO L225 Difference]: With dead ends: 32 [2019-10-15 01:06:03,387 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:06:03,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:06:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:06:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:06:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-15 01:06:03,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-10-15 01:06:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:03,432 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-15 01:06:03,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-15 01:06:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 01:06:03,434 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:03,434 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:03,434 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2019-10-15 01:06:03,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:03,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140571939] [2019-10-15 01:06:03,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:03,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:03,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:03,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140571939] [2019-10-15 01:06:03,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:03,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:06:03,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780549684] [2019-10-15 01:06:03,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:06:03,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:03,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:06:03,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:06:03,519 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-10-15 01:06:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:03,553 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-10-15 01:06:03,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:06:03,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-10-15 01:06:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:03,555 INFO L225 Difference]: With dead ends: 24 [2019-10-15 01:06:03,555 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:06:03,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:06:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:06:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-10-15 01:06:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:06:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-15 01:06:03,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-10-15 01:06:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:03,562 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-15 01:06:03,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:06:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-15 01:06:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:06:03,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:03,563 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:03,564 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2019-10-15 01:06:03,567 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:03,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262940240] [2019-10-15 01:06:03,567 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:03,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:03,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:03,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262940240] [2019-10-15 01:06:03,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634979768] [2019-10-15 01:06:03,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:03,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:06:03,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:03,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:03,809 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:06:03,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [4] total 6 [2019-10-15 01:06:03,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050836295] [2019-10-15 01:06:03,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:03,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:03,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:06:03,811 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-15 01:06:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:03,925 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2019-10-15 01:06:03,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:06:03,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-15 01:06:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:03,928 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:06:03,928 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:06:03,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:06:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2019-10-15 01:06:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:06:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-15 01:06:03,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-10-15 01:06:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:03,941 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-15 01:06:03,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-15 01:06:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:06:03,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:03,944 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:04,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:04,150 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2127699550, now seen corresponding path program 1 times [2019-10-15 01:06:04,152 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:04,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825612040] [2019-10-15 01:06:04,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:04,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:04,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:04,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825612040] [2019-10-15 01:06:04,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660042791] [2019-10-15 01:06:04,305 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 [2019-10-15 01:06:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:04,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:06:04,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:06:04,382 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:06:04,404 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:06:04,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [5] total 8 [2019-10-15 01:06:04,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100743544] [2019-10-15 01:06:04,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:04,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:04,408 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-10-15 01:06:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:04,489 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2019-10-15 01:06:04,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:06:04,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-15 01:06:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:04,491 INFO L225 Difference]: With dead ends: 57 [2019-10-15 01:06:04,491 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:06:04,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:06:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:06:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2019-10-15 01:06:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:06:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-15 01:06:04,500 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2019-10-15 01:06:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:04,500 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-15 01:06:04,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-15 01:06:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:06:04,501 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:04,502 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:04,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:04,706 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1936566178, now seen corresponding path program 1 times [2019-10-15 01:06:04,707 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:04,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468375861] [2019-10-15 01:06:04,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:04,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:04,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:06:04,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468375861] [2019-10-15 01:06:04,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128627607] [2019-10-15 01:06:04,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:04,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:06:04,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:06:04,990 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:06:05,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [575107839] [2019-10-15 01:06:05,104 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 27 [2019-10-15 01:06:05,153 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:05,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:05,245 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:06:05,249 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 11 root evaluator evaluations with a maximum evaluation depth of 0. Performed 11 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 16 variables. [2019-10-15 01:06:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:05,254 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:06:05,298 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-10-15 01:06:05,299 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:06:05,301 INFO L553 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2019-10-15 01:06:05,301 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:06:05,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:06:05,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 6, 6] total 13 [2019-10-15 01:06:05,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409580928] [2019-10-15 01:06:05,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:05,305 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:05,305 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:06:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:05,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:05,307 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 2 states. [2019-10-15 01:06:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:05,317 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-10-15 01:06:05,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:05,321 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2019-10-15 01:06:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:05,321 INFO L225 Difference]: With dead ends: 27 [2019-10-15 01:06:05,322 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:06:05,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:06:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:06:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:06:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:06:05,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2019-10-15 01:06:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:05,324 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:06:05,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:06:05,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:06:05,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:05,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:06:05,557 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:06:05,557 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:06:05,557 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:06:05,558 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:06:05,558 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: false [2019-10-15 01:06:05,558 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:06:05,558 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:06:05,558 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 21) no Hoare annotation was computed. [2019-10-15 01:06:05,559 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2019-10-15 01:06:05,559 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 21) no Hoare annotation was computed. [2019-10-15 01:06:05,559 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2019-10-15 01:06:05,559 INFO L446 ceAbstractionStarter]: At program point L11-3(lines 11 13) the Hoare annotation is: true [2019-10-15 01:06:05,559 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 21) the Hoare annotation is: true [2019-10-15 01:06:05,559 INFO L446 ceAbstractionStarter]: At program point L16(lines 6 21) the Hoare annotation is: true [2019-10-15 01:06:05,559 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2019-10-15 01:06:05,560 INFO L446 ceAbstractionStarter]: At program point L12-3(lines 12 13) the Hoare annotation is: true [2019-10-15 01:06:05,560 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2019-10-15 01:06:05,560 INFO L446 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: true [2019-10-15 01:06:05,560 INFO L443 ceAbstractionStarter]: For program point L10-4(lines 6 21) no Hoare annotation was computed. [2019-10-15 01:06:05,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:06:05 BoogieIcfgContainer [2019-10-15 01:06:05,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:06:05,573 INFO L168 Benchmark]: Toolchain (without parser) took 3301.22 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 101.8 MB in the beginning and 134.2 MB in the end (delta: -32.4 MB). Peak memory consumption was 64.0 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:05,573 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-15 01:06:05,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.08 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 162.9 MB in the end (delta: -61.5 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:05,575 INFO L168 Benchmark]: Boogie Preprocessor took 36.28 ms. Allocated memory is still 201.3 MB. Free memory was 162.9 MB in the beginning and 160.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:05,576 INFO L168 Benchmark]: RCFGBuilder took 317.46 ms. Allocated memory is still 201.3 MB. Free memory was 160.5 MB in the beginning and 146.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:05,578 INFO L168 Benchmark]: TraceAbstraction took 2532.85 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 146.2 MB in the beginning and 134.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:05,582 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 138.4 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 410.08 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 101.4 MB in the beginning and 162.9 MB in the end (delta: -61.5 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.28 ms. Allocated memory is still 201.3 MB. Free memory was 162.9 MB in the beginning and 160.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.46 ms. Allocated memory is still 201.3 MB. Free memory was 160.5 MB in the beginning and 146.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2532.85 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 146.2 MB in the beginning and 134.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 61 SDtfs, 56 SDslu, 53 SDs, 0 SdLazy, 41 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 31 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 8 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 9277 SizeOfPredicates, 7 NumberOfNonLiveVariables, 241 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 74/99 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 150, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 1.0, AVG_VARS_REMOVED_DURING_WEAKENING: 1.28, AVG_WEAKENED_CONJUNCTS: 0.0, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...