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 -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
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This is Ultimate 0.1.24-fea9116
[2019-09-20 12:57:51,763 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2019-09-20 12:57:51,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2019-09-20 12:57:51,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-09-20 12:57:51,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-09-20 12:57:51,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-09-20 12:57:51,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-09-20 12:57:51,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2019-09-20 12:57:51,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-09-20 12:57:51,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2019-09-20 12:57:51,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-09-20 12:57:51,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-09-20 12:57:51,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-09-20 12:57:51,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-09-20 12:57:51,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-09-20 12:57:51,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-09-20 12:57:51,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-09-20 12:57:51,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-09-20 12:57:51,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2019-09-20 12:57:51,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-09-20 12:57:51,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-09-20 12:57:51,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2019-09-20 12:57:51,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-09-20 12:57:51,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-09-20 12:57:51,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-09-20 12:57:51,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-09-20 12:57:51,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-09-20 12:57:51,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
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[2019-09-20 12:57:51,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2019-09-20 12:57:51,836 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
[2019-09-20 12:57:51,850 INFO L113 SettingsManager]: Loading preferences was successful
[2019-09-20 12:57:51,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2019-09-20 12:57:51,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-09-20 12:57:51,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2019-09-20 12:57:51,852 INFO L138 SettingsManager]: * Use SBE=true
[2019-09-20 12:57:51,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-09-20 12:57:51,853 INFO L138 SettingsManager]: * sizeof long=4
[2019-09-20 12:57:51,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2019-09-20 12:57:51,853 INFO L138 SettingsManager]: * sizeof POINTER=4
[2019-09-20 12:57:51,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2019-09-20 12:57:51,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2019-09-20 12:57:51,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-09-20 12:57:51,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2019-09-20 12:57:51,854 INFO L138 SettingsManager]: * sizeof long double=12
[2019-09-20 12:57:51,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2019-09-20 12:57:51,855 INFO L138 SettingsManager]: * Use constant arrays=true
[2019-09-20 12:57:51,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2019-09-20 12:57:51,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-09-20 12:57:51,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2019-09-20 12:57:51,855 INFO L138 SettingsManager]: * To the following directory=./dump/
[2019-09-20 12:57:51,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2019-09-20 12:57:51,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-09-20 12:57:51,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-09-20 12:57:51,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2019-09-20 12:57:51,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-09-20 12:57:51,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2019-09-20 12:57:51,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-09-20 12:57:51,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-09-20 12:57:51,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2019-09-20 12:57:51,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2019-09-20 12:57:51,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-09-20 12:57:51,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-09-20 12:57:51,914 INFO L271 PluginConnector]: Initializing CDTParser...
[2019-09-20 12:57:51,914 INFO L275 PluginConnector]: CDTParser initialized
[2019-09-20 12:57:51,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
[2019-09-20 12:57:51,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b35187f/fa079e56f1884fb0b9842335dbff3e3a/FLAG5d17e6b4f
[2019-09-20 12:57:52,457 INFO L306 CDTParser]: Found 1 translation units.
[2019-09-20 12:57:52,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
[2019-09-20 12:57:52,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b35187f/fa079e56f1884fb0b9842335dbff3e3a/FLAG5d17e6b4f
[2019-09-20 12:57:52,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b35187f/fa079e56f1884fb0b9842335dbff3e3a
[2019-09-20 12:57:52,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-09-20 12:57:52,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2019-09-20 12:57:52,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-09-20 12:57:52,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-09-20 12:57:52,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2019-09-20 12:57:52,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:52" (1/1) ...
[2019-09-20 12:57:52,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c6cc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:52, skipping insertion in model container
[2019-09-20 12:57:52,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:52" (1/1) ...
[2019-09-20 12:57:52,897 INFO L142 MainTranslator]: Starting translation in SV-COMP mode
[2019-09-20 12:57:52,912 INFO L173 MainTranslator]: Built tables and reachable declarations
[2019-09-20 12:57:53,100 INFO L206 PostProcessor]: Analyzing one entry point: main
[2019-09-20 12:57:53,104 INFO L188 MainTranslator]: Completed pre-run
[2019-09-20 12:57:53,117 INFO L206 PostProcessor]: Analyzing one entry point: main
[2019-09-20 12:57:53,128 INFO L192 MainTranslator]: Completed translation
[2019-09-20 12:57:53,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53 WrapperNode
[2019-09-20 12:57:53,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-09-20 12:57:53,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-09-20 12:57:53,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2019-09-20 12:57:53,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2019-09-20 12:57:53,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (1/1) ...
[2019-09-20 12:57:53,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-09-20 12:57:53,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-09-20 12:57:53,243 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2019-09-20 12:57:53,243 INFO L275 PluginConnector]: RCFGBuilder initialized
[2019-09-20 12:57:53,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (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
[2019-09-20 12:57:53,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-09-20 12:57:53,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-09-20 12:57:53,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2019-09-20 12:57:53,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2019-09-20 12:57:53,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-09-20 12:57:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2019-09-20 12:57:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2019-09-20 12:57:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-09-20 12:57:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-09-20 12:57:53,467 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-09-20 12:57:53,467 INFO L283 CfgBuilder]: Removed 1 assume(true) statements.
[2019-09-20 12:57:53,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:53 BoogieIcfgContainer
[2019-09-20 12:57:53,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-09-20 12:57:53,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-09-20 12:57:53,469 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2019-09-20 12:57:53,473 INFO L275 PluginConnector]: TraceAbstraction initialized
[2019-09-20 12:57:53,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:52" (1/3) ...
[2019-09-20 12:57:53,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15484e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:53, skipping insertion in model container
[2019-09-20 12:57:53,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:53" (2/3) ...
[2019-09-20 12:57:53,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15484e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:53, skipping insertion in model container
[2019-09-20 12:57:53,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:53" (3/3) ...
[2019-09-20 12:57:53,476 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c
[2019-09-20 12:57:53,484 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-09-20 12:57:53,491 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-09-20 12:57:53,507 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-09-20 12:57:53,539 INFO L128 ementStrategyFactory]: Using default assertion order modulation
[2019-09-20 12:57:53,540 INFO L377 AbstractCegarLoop]: Interprodecural is true
[2019-09-20 12:57:53,540 INFO L378 AbstractCegarLoop]: Hoare is true
[2019-09-20 12:57:53,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-09-20 12:57:53,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-09-20 12:57:53,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-09-20 12:57:53,541 INFO L382 AbstractCegarLoop]: Difference is false
[2019-09-20 12:57:53,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-09-20 12:57:53,541 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-09-20 12:57:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states.
[2019-09-20 12:57:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2019-09-20 12:57:53,563 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:53,564 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:53,566 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times
[2019-09-20 12:57:53,573 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:53,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:53,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-20 12:57:53,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:53,862 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5
[2019-09-20 12:57:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:53,892 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-09-20 12:57:53,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-09-20 12:57:53,897 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-09-20 12:57:53,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-09-20 12:57:53,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-09-20 12:57:53,922 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states.
[2019-09-20 12:57:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-20 12:57:54,025 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions.
[2019-09-20 12:57:54,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2019-09-20 12:57:54,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10
[2019-09-20 12:57:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-20 12:57:54,038 INFO L225 Difference]: With dead ends: 29
[2019-09-20 12:57:54,040 INFO L226 Difference]: Without dead ends: 12
[2019-09-20 12:57:54,046 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-09-20 12:57:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2019-09-20 12:57:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2019-09-20 12:57:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states.
[2019-09-20 12:57:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions.
[2019-09-20 12:57:54,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10
[2019-09-20 12:57:54,085 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-09-20 12:57:54,085 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions.
[2019-09-20 12:57:54,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-09-20 12:57:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions.
[2019-09-20 12:57:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2019-09-20 12:57:54,086 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:54,087 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:54,087 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times
[2019-09-20 12:57:54,088 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:54,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:54,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-20 12:57:54,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:54,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-09-20 12:57:54,237 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2019-09-20 12:57:54,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-20 12:57:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:54,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-09-20 12:57:54,282 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-09-20 12:57:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:54,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-09-20 12:57:54,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7
[2019-09-20 12:57:54,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-09-20 12:57:54,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-09-20 12:57:54,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-09-20 12:57:54,342 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states.
[2019-09-20 12:57:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-20 12:57:54,372 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions.
[2019-09-20 12:57:54,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2019-09-20 12:57:54,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11
[2019-09-20 12:57:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-20 12:57:54,374 INFO L225 Difference]: With dead ends: 18
[2019-09-20 12:57:54,375 INFO L226 Difference]: Without dead ends: 13
[2019-09-20 12:57:54,376 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-09-20 12:57:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2019-09-20 12:57:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2019-09-20 12:57:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2019-09-20 12:57:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2019-09-20 12:57:54,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11
[2019-09-20 12:57:54,381 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-09-20 12:57:54,381 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2019-09-20 12:57:54,382 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-09-20 12:57:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2019-09-20 12:57:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2019-09-20 12:57:54,383 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:54,383 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:54,383 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times
[2019-09-20 12:57:54,384 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:54,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:54,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-09-20 12:57:54,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:54,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-09-20 12:57:54,506 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
[2019-09-20 12:57:54,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2019-09-20 12:57:54,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2019-09-20 12:57:54,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2019-09-20 12:57:54,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core
[2019-09-20 12:57:54,557 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-09-20 12:57:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:54,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-09-20 12:57:54,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8
[2019-09-20 12:57:54,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-09-20 12:57:54,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-09-20 12:57:54,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-09-20 12:57:54,599 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states.
[2019-09-20 12:57:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-20 12:57:54,647 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions.
[2019-09-20 12:57:54,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2019-09-20 12:57:54,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12
[2019-09-20 12:57:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-20 12:57:54,649 INFO L225 Difference]: With dead ends: 19
[2019-09-20 12:57:54,649 INFO L226 Difference]: Without dead ends: 14
[2019-09-20 12:57:54,650 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-09-20 12:57:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2019-09-20 12:57:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2019-09-20 12:57:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2019-09-20 12:57:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions.
[2019-09-20 12:57:54,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12
[2019-09-20 12:57:54,655 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-09-20 12:57:54,655 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions.
[2019-09-20 12:57:54,655 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-09-20 12:57:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions.
[2019-09-20 12:57:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2019-09-20 12:57:54,656 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:54,656 INFO L407 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:54,657 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times
[2019-09-20 12:57:54,658 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:54,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:54,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:54,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-09-20 12:57:54,815 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
[2019-09-20 12:57:54,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2019-09-20 12:57:54,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2019-09-20 12:57:54,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2019-09-20 12:57:54,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 15 conjunts are in the unsatisfiable core
[2019-09-20 12:57:54,856 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-09-20 12:57:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:54,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-09-20 12:57:54,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9
[2019-09-20 12:57:54,896 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-09-20 12:57:54,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-09-20 12:57:54,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2019-09-20 12:57:54,897 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states.
[2019-09-20 12:57:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-20 12:57:54,942 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions.
[2019-09-20 12:57:54,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2019-09-20 12:57:54,943 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13
[2019-09-20 12:57:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-20 12:57:54,943 INFO L225 Difference]: With dead ends: 20
[2019-09-20 12:57:54,944 INFO L226 Difference]: Without dead ends: 15
[2019-09-20 12:57:54,944 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2019-09-20 12:57:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2019-09-20 12:57:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2019-09-20 12:57:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2019-09-20 12:57:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2019-09-20 12:57:54,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13
[2019-09-20 12:57:54,949 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-09-20 12:57:54,950 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2019-09-20 12:57:54,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-09-20 12:57:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2019-09-20 12:57:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2019-09-20 12:57:54,951 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:54,951 INFO L407 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:54,951 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times
[2019-09-20 12:57:54,952 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:54,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:54,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:55,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-09-20 12:57:55,112 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2019-09-20 12:57:55,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2019-09-20 12:57:55,153 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2019-09-20 12:57:55,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2019-09-20 12:57:55,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core
[2019-09-20 12:57:55,156 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-09-20 12:57:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:55,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-09-20 12:57:55,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10
[2019-09-20 12:57:55,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-09-20 12:57:55,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-09-20 12:57:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2019-09-20 12:57:55,189 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states.
[2019-09-20 12:57:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-20 12:57:55,243 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions.
[2019-09-20 12:57:55,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2019-09-20 12:57:55,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14
[2019-09-20 12:57:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-20 12:57:55,244 INFO L225 Difference]: With dead ends: 21
[2019-09-20 12:57:55,245 INFO L226 Difference]: Without dead ends: 16
[2019-09-20 12:57:55,245 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2019-09-20 12:57:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2019-09-20 12:57:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2019-09-20 12:57:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2019-09-20 12:57:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions.
[2019-09-20 12:57:55,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14
[2019-09-20 12:57:55,250 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-09-20 12:57:55,250 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions.
[2019-09-20 12:57:55,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-09-20 12:57:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions.
[2019-09-20 12:57:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-09-20 12:57:55,251 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:55,251 INFO L407 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:55,251 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times
[2019-09-20 12:57:55,252 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:55,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:55,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:55,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2019-09-20 12:57:55,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-09-20 12:57:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:55,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2019-09-20 12:57:55,399 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
[2019-09-20 12:57:55,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2019-09-20 12:57:55,434 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2019-09-20 12:57:55,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2019-09-20 12:57:55,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core
[2019-09-20 12:57:55,437 INFO L279 TraceCheckSpWp]: Computing forward predicates...
[2019-09-20 12:57:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-09-20 12:57:55,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-09-20 12:57:55,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11
[2019-09-20 12:57:55,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-09-20 12:57:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-09-20 12:57:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2019-09-20 12:57:55,470 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states.
[2019-09-20 12:57:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-09-20 12:57:55,546 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions.
[2019-09-20 12:57:55,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2019-09-20 12:57:55,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15
[2019-09-20 12:57:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-09-20 12:57:55,547 INFO L225 Difference]: With dead ends: 22
[2019-09-20 12:57:55,547 INFO L226 Difference]: Without dead ends: 17
[2019-09-20 12:57:55,548 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2019-09-20 12:57:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2019-09-20 12:57:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2019-09-20 12:57:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2019-09-20 12:57:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2019-09-20 12:57:55,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15
[2019-09-20 12:57:55,552 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-09-20 12:57:55,553 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2019-09-20 12:57:55,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-09-20 12:57:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2019-09-20 12:57:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2019-09-20 12:57:55,553 INFO L399 BasicCegarLoop]: Found error trace
[2019-09-20 12:57:55,554 INFO L407 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-09-20 12:57:55,554 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-09-20 12:57:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-09-20 12:57:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times
[2019-09-20 12:57:55,554 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2019-09-20 12:57:55,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2019-09-20 12:57:55,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:55,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2019-09-20 12:57:55,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-09-20 12:57:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-09-20 12:57:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-09-20 12:57:55,635 INFO L474 BasicCegarLoop]: Counterexample might be feasible
[2019-09-20 12:57:55,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:57:55 BoogieIcfgContainer
[2019-09-20 12:57:55,660 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-09-20 12:57:55,662 INFO L168 Benchmark]: Toolchain (without parser) took 2779.57 ms. Allocated memory was 131.1 MB in the beginning and 217.6 MB in the end (delta: 86.5 MB). Free memory was 86.5 MB in the beginning and 123.8 MB in the end (delta: -37.2 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB.
[2019-09-20 12:57:55,663 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 131.1 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB.
[2019-09-20 12:57:55,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.05 ms. Allocated memory is still 131.1 MB. Free memory was 86.3 MB in the beginning and 77.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2019-09-20 12:57:55,664 INFO L168 Benchmark]: Boogie Preprocessor took 112.40 ms. Allocated memory was 131.1 MB in the beginning and 197.1 MB in the end (delta: 66.1 MB). Free memory was 77.1 MB in the beginning and 173.9 MB in the end (delta: -96.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB.
[2019-09-20 12:57:55,665 INFO L168 Benchmark]: RCFGBuilder took 225.91 ms. Allocated memory is still 197.1 MB. Free memory was 173.9 MB in the beginning and 163.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB.
[2019-09-20 12:57:55,666 INFO L168 Benchmark]: TraceAbstraction took 2190.66 ms. Allocated memory was 197.1 MB in the beginning and 217.6 MB in the end (delta: 20.4 MB). Free memory was 162.4 MB in the beginning and 123.8 MB in the end (delta: 38.6 MB). Peak memory consumption was 59.1 MB. Max. memory is 7.1 GB.
[2019-09-20 12:57:55,670 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.24 ms. Allocated memory is still 131.1 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 246.05 ms. Allocated memory is still 131.1 MB. Free memory was 86.3 MB in the beginning and 77.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 112.40 ms. Allocated memory was 131.1 MB in the beginning and 197.1 MB in the end (delta: 66.1 MB). Free memory was 77.1 MB in the beginning and 173.9 MB in the end (delta: -96.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 225.91 ms. Allocated memory is still 197.1 MB. Free memory was 173.9 MB in the beginning and 163.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 2190.66 ms. Allocated memory was 197.1 MB in the beginning and 217.6 MB in the end (delta: 20.4 MB). Free memory was 162.4 MB in the beginning and 123.8 MB in the end (delta: 38.6 MB). Peak memory consumption was 59.1 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L11] unsigned int x = 0;
[L12] unsigned int y = 1;
VAL [x=0, y=1]
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
VAL [x=1, y=2]
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
VAL [x=2, y=4]
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
VAL [x=3, y=8]
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
VAL [x=4, y=16]
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
VAL [x=5, y=32]
[L14] COND TRUE x < 6
[L15] x++
[L16] y *= 2
VAL [x=6, y=64]
[L14] COND FALSE !(x < 6)
VAL [x=6, y=64]
[L19] CALL __VERIFIER_assert(x != 6)
VAL [\old(cond)=0]
[L4] COND TRUE !(cond)
VAL [\old(cond)=0, cond=0]
[L5] __VERIFIER_error()
VAL [\old(cond)=0, cond=0]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 17 locations, 1 error locations. UNSAFE Result, 2.1s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 256 SDs, 0 SdLazy, 193 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 5249 SizeOfPredicates, 0 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...