/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:43:44,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:43:44,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:43:44,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:43:44,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:43:44,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:43:44,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:43:44,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:43:44,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:43:44,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:43:44,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:43:44,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:43:44,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:43:44,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:43:44,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:43:44,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:43:44,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:43:44,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:43:44,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:43:44,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:43:44,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:43:44,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:43:44,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:43:44,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:43:44,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:43:44,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:43:44,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:43:44,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:43:44,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:43:44,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:43:44,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:43:44,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:43:44,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:43:44,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:43:44,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:43:44,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:43:44,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:43:44,948 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:43:44,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:43:44,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:43:44,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:43:44,952 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:43:44,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:43:44,952 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:43:44,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:43:44,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:43:44,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:43:44,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:43:44,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:43:44,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:43:44,955 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:43:44,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:43:44,956 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:43:44,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:43:44,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:43:44,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:43:44,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:43:44,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:43:44,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:43:44,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:43:44,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:43:44,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:43:44,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:43:44,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:43:44,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:43:44,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:43:45,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:43:45,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:43:45,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:43:45,267 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:43:45,268 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:43:45,269 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2019-11-06 18:43:45,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275c6b4e/1ca642cb265c4fbe84b476f158acbf21/FLAGb788c37db [2019-11-06 18:43:45,788 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:43:45,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2019-11-06 18:43:45,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275c6b4e/1ca642cb265c4fbe84b476f158acbf21/FLAGb788c37db [2019-11-06 18:43:46,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275c6b4e/1ca642cb265c4fbe84b476f158acbf21 [2019-11-06 18:43:46,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:43:46,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:43:46,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:43:46,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:43:46,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:43:46,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13edb10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46, skipping insertion in model container [2019-11-06 18:43:46,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,189 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:43:46,208 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:43:46,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:43:46,424 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:43:46,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:43:46,459 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:43:46,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46 WrapperNode [2019-11-06 18:43:46,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:43:46,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:43:46,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:43:46,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:43:46,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... [2019-11-06 18:43:46,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:43:46,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:43:46,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:43:46,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:43:46,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:43:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:43:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:43:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:43:46,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:43:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:43:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:43:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:43:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:43:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:43:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:43:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:43:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:43:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:43:46,866 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:43:46,867 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:43:46,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:43:46 BoogieIcfgContainer [2019-11-06 18:43:46,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:43:46,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:43:46,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:43:46,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:43:46,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:43:46" (1/3) ... [2019-11-06 18:43:46,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683183be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:43:46, skipping insertion in model container [2019-11-06 18:43:46,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:46" (2/3) ... [2019-11-06 18:43:46,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683183be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:43:46, skipping insertion in model container [2019-11-06 18:43:46,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:43:46" (3/3) ... [2019-11-06 18:43:46,894 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2019-11-06 18:43:46,906 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:43:46,913 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:43:46,940 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:43:46,977 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:43:46,978 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:43:46,978 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:43:46,978 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:43:46,978 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:43:46,978 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:43:46,978 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:43:46,979 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:43:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-06 18:43:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:43:47,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:47,005 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:47,007 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash 578824766, now seen corresponding path program 1 times [2019-11-06 18:43:47,019 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:47,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82770576] [2019-11-06 18:43:47,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:47,170 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82770576] [2019-11-06 18:43:47,171 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:43:47,172 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:43:47,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712946967] [2019-11-06 18:43:47,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:43:47,177 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:47,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:43:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:43:47,193 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-06 18:43:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:47,309 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2019-11-06 18:43:47,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:43:47,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:43:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:47,319 INFO L225 Difference]: With dead ends: 47 [2019-11-06 18:43:47,320 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 18:43:47,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:43:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 18:43:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 18:43:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:43:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-06 18:43:47,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2019-11-06 18:43:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:47,366 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-06 18:43:47,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:43:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-06 18:43:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:43:47,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:47,367 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:47,368 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash -823304390, now seen corresponding path program 1 times [2019-11-06 18:43:47,369 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:47,369 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471737581] [2019-11-06 18:43:47,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:47,449 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471737581] [2019-11-06 18:43:47,451 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:43:47,451 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:43:47,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226396400] [2019-11-06 18:43:47,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:43:47,453 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:47,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:43:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:43:47,454 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2019-11-06 18:43:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:47,553 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-11-06 18:43:47,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:43:47,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:43:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:47,555 INFO L225 Difference]: With dead ends: 40 [2019-11-06 18:43:47,555 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:43:47,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:43:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:43:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 18:43:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:43:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-06 18:43:47,568 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-11-06 18:43:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:47,570 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-06 18:43:47,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:43:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-06 18:43:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:43:47,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:47,571 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:47,572 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:47,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 3753729, now seen corresponding path program 1 times [2019-11-06 18:43:47,574 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:47,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109403037] [2019-11-06 18:43:47,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:43:47,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109403037] [2019-11-06 18:43:47,676 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104795228] [2019-11-06 18:43:47,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:43:47,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:43:47,773 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:47,773 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:43:47,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406217297] [2019-11-06 18:43:47,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:43:47,774 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:43:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:47,775 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-11-06 18:43:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:47,863 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-11-06 18:43:47,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:43:47,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 18:43:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:47,865 INFO L225 Difference]: With dead ends: 45 [2019-11-06 18:43:47,865 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:43:47,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:43:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:43:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:43:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-06 18:43:47,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2019-11-06 18:43:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:47,874 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-06 18:43:47,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:43:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-06 18:43:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:43:47,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:47,875 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:48,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:48,088 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1185149478, now seen corresponding path program 2 times [2019-11-06 18:43:48,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:48,089 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038872908] [2019-11-06 18:43:48,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:43:48,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038872908] [2019-11-06 18:43:48,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909794236] [2019-11-06 18:43:48,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:48,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:48,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:48,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:43:48,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:43:48,293 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:48,293 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:43:48,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078824846] [2019-11-06 18:43:48,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:43:48,294 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:48,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:43:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:48,295 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2019-11-06 18:43:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:48,376 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-06 18:43:48,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:43:48,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-06 18:43:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:48,378 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:43:48,378 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:43:48,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:43:48,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 18:43:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:43:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-06 18:43:48,392 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2019-11-06 18:43:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:48,392 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-06 18:43:48,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:43:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-06 18:43:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:43:48,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:48,393 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:48,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:48,595 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash 455820257, now seen corresponding path program 3 times [2019-11-06 18:43:48,596 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:48,597 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642380088] [2019-11-06 18:43:48,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:43:48,705 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642380088] [2019-11-06 18:43:48,706 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358009035] [2019-11-06 18:43:48,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:48,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:43:48,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:48,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:43:48,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:43:48,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:48,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:43:48,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728656944] [2019-11-06 18:43:48,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:43:48,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:43:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:48,791 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2019-11-06 18:43:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:48,894 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-11-06 18:43:48,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:43:48,895 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-06 18:43:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:48,895 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:43:48,896 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:43:48,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:48,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:43:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:43:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:43:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-06 18:43:48,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2019-11-06 18:43:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:48,903 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-06 18:43:48,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:43:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-06 18:43:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:43:48,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:48,904 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:49,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,108 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1002382458, now seen corresponding path program 4 times [2019-11-06 18:43:49,109 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:49,109 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924422493] [2019-11-06 18:43:49,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:43:49,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924422493] [2019-11-06 18:43:49,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566322572] [2019-11-06 18:43:49,235 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,283 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:49,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:49,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:43:49,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:43:49,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:49,306 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:43:49,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641949707] [2019-11-06 18:43:49,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:43:49,307 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:43:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:49,308 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2019-11-06 18:43:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:49,432 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-11-06 18:43:49,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:43:49,433 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-06 18:43:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:49,434 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:43:49,434 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:43:49,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:43:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-06 18:43:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:43:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-11-06 18:43:49,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2019-11-06 18:43:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:49,442 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-11-06 18:43:49,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:43:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-11-06 18:43:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:43:49,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:49,443 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:49,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,647 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1395779391, now seen corresponding path program 5 times [2019-11-06 18:43:49,648 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:49,649 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700671589] [2019-11-06 18:43:49,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:43:49,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700671589] [2019-11-06 18:43:49,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730567728] [2019-11-06 18:43:49,801 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,989 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:43:49,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:49,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:43:49,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:43:50,015 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:50,015 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:43:50,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011347767] [2019-11-06 18:43:50,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:43:50,016 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:43:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:50,017 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2019-11-06 18:43:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:50,128 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2019-11-06 18:43:50,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:43:50,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-11-06 18:43:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:50,129 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:43:50,130 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:43:50,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:43:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:43:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:43:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-06 18:43:50,137 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2019-11-06 18:43:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:50,138 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-06 18:43:50,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:43:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-06 18:43:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:43:50,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:50,139 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:50,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:50,343 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:50,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1957995290, now seen corresponding path program 6 times [2019-11-06 18:43:50,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:50,344 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074297248] [2019-11-06 18:43:50,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 18:43:50,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074297248] [2019-11-06 18:43:50,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995642208] [2019-11-06 18:43:50,441 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:50,558 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:43:50,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:50,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:43:50,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 18:43:50,584 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:50,584 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:43:50,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659516242] [2019-11-06 18:43:50,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:43:50,585 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:43:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:50,586 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2019-11-06 18:43:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:50,671 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2019-11-06 18:43:50,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:43:50,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-11-06 18:43:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:50,672 INFO L225 Difference]: With dead ends: 70 [2019-11-06 18:43:50,673 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:43:50,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:43:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 18:43:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:43:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-11-06 18:43:50,681 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2019-11-06 18:43:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:50,682 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-11-06 18:43:50,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:43:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-11-06 18:43:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:43:50,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:50,683 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:50,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:50,884 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1474050655, now seen corresponding path program 7 times [2019-11-06 18:43:50,886 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:50,886 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131219251] [2019-11-06 18:43:50,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 18:43:51,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131219251] [2019-11-06 18:43:51,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265913152] [2019-11-06 18:43:51,022 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:43:51,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 18:43:51,098 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:51,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:43:51,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396607791] [2019-11-06 18:43:51,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:43:51,099 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:51,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:43:51,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:51,105 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 12 states. [2019-11-06 18:43:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:51,216 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-06 18:43:51,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:43:51,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-11-06 18:43:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:51,218 INFO L225 Difference]: With dead ends: 75 [2019-11-06 18:43:51,218 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:43:51,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:43:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:43:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:43:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2019-11-06 18:43:51,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 38 [2019-11-06 18:43:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:51,226 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2019-11-06 18:43:51,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:43:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2019-11-06 18:43:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:43:51,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:51,227 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:51,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:51,428 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2136639930, now seen corresponding path program 8 times [2019-11-06 18:43:51,429 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:51,430 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470363841] [2019-11-06 18:43:51,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:43:51,558 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470363841] [2019-11-06 18:43:51,558 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052179955] [2019-11-06 18:43:51,559 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:51,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:51,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:51,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:43:51,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:43:51,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:51,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:43:51,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620398488] [2019-11-06 18:43:51,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:43:51,630 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:43:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:51,631 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 13 states. [2019-11-06 18:43:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:51,734 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:43:51,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:43:51,734 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-11-06 18:43:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:51,735 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:43:51,735 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:43:51,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:51,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:43:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-06 18:43:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:43:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2019-11-06 18:43:51,743 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2019-11-06 18:43:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:51,743 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2019-11-06 18:43:51,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:43:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2019-11-06 18:43:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:43:51,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:51,744 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:51,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:51,948 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1548858751, now seen corresponding path program 9 times [2019-11-06 18:43:51,949 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:51,950 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760496214] [2019-11-06 18:43:51,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-06 18:43:52,060 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760496214] [2019-11-06 18:43:52,060 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622417881] [2019-11-06 18:43:52,060 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:52,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:43:52,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:52,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:43:52,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-06 18:43:52,707 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:52,707 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-06 18:43:52,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746521914] [2019-11-06 18:43:52,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:43:52,708 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:43:52,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:52,709 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2019-11-06 18:43:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:52,822 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2019-11-06 18:43:52,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:43:52,822 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2019-11-06 18:43:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:52,823 INFO L225 Difference]: With dead ends: 85 [2019-11-06 18:43:52,823 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:43:52,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:43:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:43:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:43:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-06 18:43:52,831 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2019-11-06 18:43:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:52,831 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-06 18:43:52,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:43:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-06 18:43:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:43:52,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:52,832 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:53,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:53,037 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1397676122, now seen corresponding path program 10 times [2019-11-06 18:43:53,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:53,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391285556] [2019-11-06 18:43:53,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-06 18:43:53,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391285556] [2019-11-06 18:43:53,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035481135] [2019-11-06 18:43:53,202 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:53,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:53,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:53,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:43:53,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-06 18:43:53,295 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:53,295 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:43:53,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787503920] [2019-11-06 18:43:53,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:43:53,296 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:53,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:43:53,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:53,297 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 15 states. [2019-11-06 18:43:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:53,431 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2019-11-06 18:43:53,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:43:53,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2019-11-06 18:43:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:53,433 INFO L225 Difference]: With dead ends: 90 [2019-11-06 18:43:53,433 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:43:53,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:43:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-06 18:43:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:43:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2019-11-06 18:43:53,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2019-11-06 18:43:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:53,441 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2019-11-06 18:43:53,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:43:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2019-11-06 18:43:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:43:53,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:53,442 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:53,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:53,653 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:53,654 INFO L82 PathProgramCache]: Analyzing trace with hash -110123167, now seen corresponding path program 11 times [2019-11-06 18:43:53,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:53,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866822897] [2019-11-06 18:43:53,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-06 18:43:53,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866822897] [2019-11-06 18:43:53,864 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274588778] [2019-11-06 18:43:53,864 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:57,335 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:43:57,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:57,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:43:57,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-06 18:43:57,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:57,362 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:43:57,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051643536] [2019-11-06 18:43:57,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:43:57,363 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:43:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:57,363 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 16 states. [2019-11-06 18:43:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:57,473 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2019-11-06 18:43:57,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:43:57,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-11-06 18:43:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:57,475 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:43:57,475 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:43:57,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:43:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-06 18:43:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:43:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2019-11-06 18:43:57,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2019-11-06 18:43:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:57,483 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2019-11-06 18:43:57,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:43:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2019-11-06 18:43:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:43:57,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:57,484 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:57,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:57,690 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1531998470, now seen corresponding path program 12 times [2019-11-06 18:43:57,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:57,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411982261] [2019-11-06 18:43:57,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-06 18:43:57,865 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411982261] [2019-11-06 18:43:57,865 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600463133] [2019-11-06 18:43:57,865 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:00,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:44:00,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:00,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:44:00,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-06 18:44:00,635 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:00,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-11-06 18:44:00,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202999422] [2019-11-06 18:44:00,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:44:00,636 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:44:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:00,637 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 18 states. [2019-11-06 18:44:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:00,784 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2019-11-06 18:44:00,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:44:00,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2019-11-06 18:44:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:00,786 INFO L225 Difference]: With dead ends: 100 [2019-11-06 18:44:00,786 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:44:00,787 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:44:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-06 18:44:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:44:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-11-06 18:44:00,796 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 53 [2019-11-06 18:44:00,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:00,796 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-11-06 18:44:00,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:44:00,796 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-11-06 18:44:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:44:00,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:00,799 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:01,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:01,005 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:01,006 INFO L82 PathProgramCache]: Analyzing trace with hash -420881343, now seen corresponding path program 13 times [2019-11-06 18:44:01,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:01,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766282643] [2019-11-06 18:44:01,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-06 18:44:01,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766282643] [2019-11-06 18:44:01,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645954763] [2019-11-06 18:44:01,188 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:01,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:44:01,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-06 18:44:01,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:01,281 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:44:01,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271991227] [2019-11-06 18:44:01,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:44:01,282 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:44:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:01,284 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 18 states. [2019-11-06 18:44:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:01,451 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2019-11-06 18:44:01,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:44:01,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2019-11-06 18:44:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:01,452 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:44:01,452 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:44:01,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:44:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-06 18:44:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:44:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-11-06 18:44:01,473 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2019-11-06 18:44:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:01,473 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-11-06 18:44:01,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:44:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-11-06 18:44:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:44:01,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:01,475 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:01,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:01,675 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:01,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1004884582, now seen corresponding path program 14 times [2019-11-06 18:44:01,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:01,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323270479] [2019-11-06 18:44:01,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:44:01,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323270479] [2019-11-06 18:44:01,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607515669] [2019-11-06 18:44:01,869 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:01,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:01,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:01,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:44:01,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:44:01,957 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:01,957 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:44:01,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543070823] [2019-11-06 18:44:01,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:44:01,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:44:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:44:01,964 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 19 states. [2019-11-06 18:44:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:02,117 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:44:02,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:44:02,118 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-11-06 18:44:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:02,119 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:44:02,119 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:44:02,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:44:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:44:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-11-06 18:44:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:44:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-11-06 18:44:02,126 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 59 [2019-11-06 18:44:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:02,126 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-11-06 18:44:02,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:44:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-11-06 18:44:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:44:02,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:02,127 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:02,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:02,338 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1390483167, now seen corresponding path program 15 times [2019-11-06 18:44:02,338 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:02,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863956853] [2019-11-06 18:44:02,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-06 18:44:02,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863956853] [2019-11-06 18:44:02,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479555825] [2019-11-06 18:44:02,526 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:07,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:44:07,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:07,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:44:07,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-06 18:44:07,051 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:07,051 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:44:07,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893581171] [2019-11-06 18:44:07,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:44:07,052 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:44:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:44:07,053 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 20 states. [2019-11-06 18:44:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:07,255 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2019-11-06 18:44:07,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:44:07,255 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-11-06 18:44:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:07,256 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:44:07,256 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 18:44:07,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:44:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 18:44:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-06 18:44:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:44:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2019-11-06 18:44:07,266 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2019-11-06 18:44:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:07,266 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2019-11-06 18:44:07,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:44:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2019-11-06 18:44:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:44:07,267 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:07,267 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:07,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:07,468 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:07,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2125345850, now seen corresponding path program 16 times [2019-11-06 18:44:07,469 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:07,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481161069] [2019-11-06 18:44:07,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-06 18:44:07,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481161069] [2019-11-06 18:44:07,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302721434] [2019-11-06 18:44:07,661 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:07,721 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:07,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:07,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:44:07,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-06 18:44:07,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:07,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:44:07,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581095666] [2019-11-06 18:44:07,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:44:07,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:44:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:44:07,744 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 21 states. [2019-11-06 18:44:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:07,933 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-06 18:44:07,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:44:07,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2019-11-06 18:44:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:07,934 INFO L225 Difference]: With dead ends: 120 [2019-11-06 18:44:07,935 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:44:07,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:44:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:44:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-06 18:44:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:44:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2019-11-06 18:44:07,941 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 65 [2019-11-06 18:44:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:07,941 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2019-11-06 18:44:07,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:44:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2019-11-06 18:44:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 18:44:07,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:07,942 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:08,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:08,146 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1332687359, now seen corresponding path program 17 times [2019-11-06 18:44:08,147 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:08,147 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356155951] [2019-11-06 18:44:08,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-11-06 18:44:08,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356155951] [2019-11-06 18:44:08,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321970144] [2019-11-06 18:44:08,473 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true