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/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:21,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:21,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:21,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:21,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:21,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:21,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:21,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:21,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:21,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:21,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:21,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:21,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:21,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:21,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:21,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:21,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:21,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:21,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:21,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:21,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:21,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:21,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:21,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:21,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:21,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:59:21,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:59:21,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:59:21,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:59:21,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:59:21,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:59:21,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:59:21,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:59:21,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:21,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:21,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:21,932 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 12:59:21,954 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:21,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:21,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:21,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:21,957 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:21,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:21,957 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:21,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:21,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:21,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:21,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:21,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:21,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:21,959 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:21,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:21,959 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:21,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:21,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:21,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:21,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:21,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:21,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:21,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:21,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:21,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:21,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:21,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:21,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:21,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:22,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:22,014 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:22,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:22,019 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:22,020 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:22,020 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2019-09-20 12:59:22,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be798994f/2dc3f53f11724b3c984820a2105d1764/FLAG64aa9802d [2019-09-20 12:59:22,547 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:22,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2019-09-20 12:59:22,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be798994f/2dc3f53f11724b3c984820a2105d1764/FLAG64aa9802d [2019-09-20 12:59:22,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be798994f/2dc3f53f11724b3c984820a2105d1764 [2019-09-20 12:59:22,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:22,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:22,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:22,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:22,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:22,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:22" (1/1) ... [2019-09-20 12:59:22,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df957dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:22, skipping insertion in model container [2019-09-20 12:59:22,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:22" (1/1) ... [2019-09-20 12:59:22,993 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:23,012 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:23,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:23,195 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:23,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:23,233 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:23,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23 WrapperNode [2019-09-20 12:59:23,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:23,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:23,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:23,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:23,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (1/1) ... [2019-09-20 12:59:23,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:23,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:23,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:23,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:23,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (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 12:59:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:23,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:59:23,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:59:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:59:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:23,720 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:23,720 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 12:59:23,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:23 BoogieIcfgContainer [2019-09-20 12:59:23,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:23,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:23,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:23,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:23,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:22" (1/3) ... [2019-09-20 12:59:23,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1681f1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:23, skipping insertion in model container [2019-09-20 12:59:23,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:23" (2/3) ... [2019-09-20 12:59:23,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1681f1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:23, skipping insertion in model container [2019-09-20 12:59:23,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:23" (3/3) ... [2019-09-20 12:59:23,730 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2019-09-20 12:59:23,741 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:23,749 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:23,769 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:23,811 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:23,811 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:23,812 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:23,812 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:23,812 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:23,812 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:23,812 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:23,812 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:23,812 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-20 12:59:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:23,833 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:23,834 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:23,836 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-09-20 12:59:23,842 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:23,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:23,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:23,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:23,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:23,984 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 12:59:23,986 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:23,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:59:23,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:59:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:59:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:24,009 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-20 12:59:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:24,049 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-09-20 12:59:24,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:59:24,051 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-20 12:59:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:24,063 INFO L225 Difference]: With dead ends: 50 [2019-09-20 12:59:24,063 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 12:59:24,071 INFO L636 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 [2019-09-20 12:59:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 12:59:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-20 12:59:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-20 12:59:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-20 12:59:24,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-20 12:59:24,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:24,132 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-20 12:59:24,133 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:59:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-20 12:59:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:24,135 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:24,136 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:24,138 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-09-20 12:59:24,140 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:24,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:24,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:24,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:24,269 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 12:59:24,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:24,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:24,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:24,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:24,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:24,275 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-20 12:59:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:24,361 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-09-20 12:59:24,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:24,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-20 12:59:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:24,365 INFO L225 Difference]: With dead ends: 45 [2019-09-20 12:59:24,365 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:24,366 INFO L636 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 [2019-09-20 12:59:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-20 12:59:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 12:59:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-20 12:59:24,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-20 12:59:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:24,376 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-20 12:59:24,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-20 12:59:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 12:59:24,377 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:24,378 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:24,379 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-09-20 12:59:24,380 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:24,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:24,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:24,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:24,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:24,495 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 12:59:24,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:24,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:24,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:24,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:24,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-20 12:59:24,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:24,617 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-09-20 12:59:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:24,814 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-09-20 12:59:24,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:24,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-09-20 12:59:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:24,818 INFO L225 Difference]: With dead ends: 61 [2019-09-20 12:59:24,818 INFO L226 Difference]: Without dead ends: 44 [2019-09-20 12:59:24,821 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:59:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-20 12:59:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-09-20 12:59:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 12:59:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-09-20 12:59:24,839 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-09-20 12:59:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:24,839 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-09-20 12:59:24,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-09-20 12:59:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-20 12:59:24,841 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:24,841 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:24,842 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-09-20 12:59:24,843 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:24,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:24,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:24,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-20 12:59:25,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:25,068 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 12:59:25,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:25,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 12:59:25,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-20 12:59:25,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:25,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-09-20 12:59:25,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 12:59:25,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 12:59:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-09-20 12:59:25,264 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 15 states. [2019-09-20 12:59:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:25,886 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-09-20 12:59:25,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-20 12:59:25,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-09-20 12:59:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:25,889 INFO L225 Difference]: With dead ends: 130 [2019-09-20 12:59:25,889 INFO L226 Difference]: Without dead ends: 104 [2019-09-20 12:59:25,891 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-09-20 12:59:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-20 12:59:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-09-20 12:59:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-20 12:59:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-09-20 12:59:25,906 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-09-20 12:59:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:25,906 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-09-20 12:59:25,906 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 12:59:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-09-20 12:59:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-20 12:59:25,908 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:25,909 INFO L407 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:25,909 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-09-20 12:59:25,910 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:25,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:25,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:25,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-20 12:59:26,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:26,227 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:26,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:26,306 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:26,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:26,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:59:26,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-09-20 12:59:26,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:26,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-09-20 12:59:26,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-20 12:59:26,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-20 12:59:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-09-20 12:59:26,489 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 26 states. [2019-09-20 12:59:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:27,802 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-09-20 12:59:27,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-20 12:59:27,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2019-09-20 12:59:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:27,805 INFO L225 Difference]: With dead ends: 271 [2019-09-20 12:59:27,805 INFO L226 Difference]: Without dead ends: 204 [2019-09-20 12:59:27,808 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1143, Invalid=3017, Unknown=0, NotChecked=0, Total=4160 [2019-09-20 12:59:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-20 12:59:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-09-20 12:59:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-20 12:59:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-09-20 12:59:27,834 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-09-20 12:59:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:27,835 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-09-20 12:59:27,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-20 12:59:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-09-20 12:59:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-20 12:59:27,838 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:27,838 INFO L407 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:27,839 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-09-20 12:59:27,839 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:27,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:27,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-20 12:59:28,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:28,239 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 12:59:28,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:28,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 12:59:28,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:28,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:28,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-09-20 12:59:28,361 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:28,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-09-20 12:59:28,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-20 12:59:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-20 12:59:28,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-20 12:59:28,363 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 28 states. [2019-09-20 12:59:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:28,985 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2019-09-20 12:59:28,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-20 12:59:28,986 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2019-09-20 12:59:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:28,988 INFO L225 Difference]: With dead ends: 244 [2019-09-20 12:59:28,988 INFO L226 Difference]: Without dead ends: 173 [2019-09-20 12:59:28,989 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2019-09-20 12:59:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-20 12:59:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 106. [2019-09-20 12:59:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-20 12:59:29,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-09-20 12:59:29,004 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 81 [2019-09-20 12:59:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:29,005 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-09-20 12:59:29,005 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-20 12:59:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-09-20 12:59:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-20 12:59:29,007 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:29,007 INFO L407 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:29,008 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash -787338302, now seen corresponding path program 4 times [2019-09-20 12:59:29,008 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:29,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:29,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:29,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:29,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-09-20 12:59:29,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:29,154 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 12:59:29,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:29,274 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:59:29,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:29,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:59:29,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-20 12:59:29,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:29,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2019-09-20 12:59:29,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-20 12:59:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-20 12:59:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-09-20 12:59:29,436 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 25 states. [2019-09-20 12:59:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:30,095 INFO L93 Difference]: Finished difference Result 262 states and 320 transitions. [2019-09-20 12:59:30,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-20 12:59:30,095 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-09-20 12:59:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:30,097 INFO L225 Difference]: With dead ends: 262 [2019-09-20 12:59:30,097 INFO L226 Difference]: Without dead ends: 189 [2019-09-20 12:59:30,098 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2019-09-20 12:59:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-20 12:59:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2019-09-20 12:59:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-20 12:59:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2019-09-20 12:59:30,116 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 81 [2019-09-20 12:59:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:30,117 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2019-09-20 12:59:30,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-20 12:59:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2019-09-20 12:59:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-20 12:59:30,119 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:30,120 INFO L407 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:30,120 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:30,120 INFO L82 PathProgramCache]: Analyzing trace with hash -273507723, now seen corresponding path program 5 times [2019-09-20 12:59:30,120 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:30,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:30,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:30,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:30,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2019-09-20 12:59:30,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:30,451 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:30,474 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1