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_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:47:02,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:47:02,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:47:02,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:47:02,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:47:02,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:47:02,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:47:02,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:47:02,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:47:02,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:47:02,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:47:02,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:47:02,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:47:02,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:47:02,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:47:02,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:47:02,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:47:02,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:47:02,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:47:02,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:47:02,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:47:02,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:47:02,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:47:02,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:47:02,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:47:02,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:47:02,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:47:02,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:47:02,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:47:02,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:47:02,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:47:02,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:47:02,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:47:02,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:47:02,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:47:02,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:47:02,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:47:02,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:47:02,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:47:02,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:47:02,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:47:02,994 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:47:02,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:47:02,994 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:47:02,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:47:02,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:47:02,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:47:02,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:47:02,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:47:02,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:47:02,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:47:02,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:47:02,996 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:47:02,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:47:02,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:47:02,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:47:02,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:47:02,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:47:02,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:02,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:47:02,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:47:02,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:47:02,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:47:02,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:47:02,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:47:02,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:47:03,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:47:03,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:47:03,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:47:03,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:47:03,289 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:47:03,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-10-13 17:47:03,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6721f8c6a/aa862401d8794125a6b506e1655c7763/FLAG73b8e423d [2019-10-13 17:47:03,835 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:47:03,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2019-10-13 17:47:03,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6721f8c6a/aa862401d8794125a6b506e1655c7763/FLAG73b8e423d [2019-10-13 17:47:04,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6721f8c6a/aa862401d8794125a6b506e1655c7763 [2019-10-13 17:47:04,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:47:04,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:47:04,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:04,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:47:04,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:47:04,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af8c95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04, skipping insertion in model container [2019-10-13 17:47:04,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,228 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:47:04,250 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:47:04,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:04,442 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:47:04,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:47:04,557 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:47:04,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04 WrapperNode [2019-10-13 17:47:04,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:47:04,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:47:04,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:47:04,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:47:04,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,603 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... [2019-10-13 17:47:04,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:47:04,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:47:04,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:47:04,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:47:04,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:47:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:47:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:47:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:47:04,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:47:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:47:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:47:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:47:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:47:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:47:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:47:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:47:04,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:47:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:47:04,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:47:04,994 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:47:04,995 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 17:47:04,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:04 BoogieIcfgContainer [2019-10-13 17:47:04,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:47:04,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:47:04,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:47:05,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:47:05,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:47:04" (1/3) ... [2019-10-13 17:47:05,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca9c871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:05, skipping insertion in model container [2019-10-13 17:47:05,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:47:04" (2/3) ... [2019-10-13 17:47:05,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca9c871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:47:05, skipping insertion in model container [2019-10-13 17:47:05,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:47:04" (3/3) ... [2019-10-13 17:47:05,005 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2019-10-13 17:47:05,012 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:47:05,018 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:47:05,030 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:47:05,055 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:47:05,055 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:47:05,055 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:47:05,055 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:47:05,055 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:47:05,056 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:47:05,056 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:47:05,056 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:47:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-13 17:47:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:47:05,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,078 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,080 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash -825680561, now seen corresponding path program 1 times [2019-10-13 17:47:05,091 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107604694] [2019-10-13 17:47:05,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:05,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107604694] [2019-10-13 17:47:05,248 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:05,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:47:05,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840134342] [2019-10-13 17:47:05,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:47:05,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:47:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:47:05,277 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-10-13 17:47:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,419 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2019-10-13 17:47:05,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:47:05,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-13 17:47:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,432 INFO L225 Difference]: With dead ends: 59 [2019-10-13 17:47:05,432 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:47:05,441 INFO L600 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 [2019-10-13 17:47:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:47:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 17:47:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:47:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-10-13 17:47:05,487 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2019-10-13 17:47:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:05,487 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-13 17:47:05,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:47:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-10-13 17:47:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:47:05,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,489 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,490 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1876449348, now seen corresponding path program 1 times [2019-10-13 17:47:05,491 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466866861] [2019-10-13 17:47:05,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:47:05,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466866861] [2019-10-13 17:47:05,576 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:47:05,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:47:05,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823738277] [2019-10-13 17:47:05,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:47:05,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:47:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:47:05,580 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2019-10-13 17:47:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,698 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-13 17:47:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:47:05,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 17:47:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,700 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:47:05,701 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:47:05,702 INFO L600 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 [2019-10-13 17:47:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:47:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-10-13 17:47:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:47:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-13 17:47:05,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2019-10-13 17:47:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:05,716 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-13 17:47:05,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:47:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-13 17:47:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 17:47:05,720 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,720 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,721 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash -684235798, now seen corresponding path program 1 times [2019-10-13 17:47:05,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493747993] [2019-10-13 17:47:05,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:05,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493747993] [2019-10-13 17:47:05,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588588048] [2019-10-13 17:47:05,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:47:05,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:47:06,028 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:06,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:47:06,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043534112] [2019-10-13 17:47:06,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:47:06,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:47:06,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:06,031 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2019-10-13 17:47:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,180 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-13 17:47:06,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:47:06,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-13 17:47:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,182 INFO L225 Difference]: With dead ends: 62 [2019-10-13 17:47:06,182 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 17:47:06,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:47:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 17:47:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-10-13 17:47:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:47:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-13 17:47:06,191 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2019-10-13 17:47:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,191 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-13 17:47:06,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:47:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-13 17:47:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 17:47:06,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,193 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,396 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1590841348, now seen corresponding path program 2 times [2019-10-13 17:47:06,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488463517] [2019-10-13 17:47:06,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:47:06,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488463517] [2019-10-13 17:47:06,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213243008] [2019-10-13 17:47:06,493 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 [2019-10-13 17:47:06,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:06,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:06,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:47:06,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:47:06,575 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:06,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:47:06,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142270038] [2019-10-13 17:47:06,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:47:06,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:47:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:06,577 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2019-10-13 17:47:06,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,695 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-10-13 17:47:06,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:47:06,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-13 17:47:06,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,696 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:47:06,696 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 17:47:06,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:47:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 17:47:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-10-13 17:47:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:47:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2019-10-13 17:47:06,705 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 27 [2019-10-13 17:47:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,706 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2019-10-13 17:47:06,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:47:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2019-10-13 17:47:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 17:47:06,707 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,707 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,911 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1802172202, now seen corresponding path program 3 times [2019-10-13 17:47:06,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402198697] [2019-10-13 17:47:06,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:47:07,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402198697] [2019-10-13 17:47:07,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270679874] [2019-10-13 17:47:07,060 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:47:07,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:47:07,163 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 17:47:07,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280028444] [2019-10-13 17:47:07,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:47:07,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:47:07,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:47:07,165 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 8 states. [2019-10-13 17:47:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:07,324 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2019-10-13 17:47:07,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:47:07,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-10-13 17:47:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:07,326 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:47:07,326 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 17:47:07,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:47:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 17:47:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-10-13 17:47:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:47:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-10-13 17:47:07,342 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 33 [2019-10-13 17:47:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:07,343 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-10-13 17:47:07,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:47:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-10-13 17:47:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:47:07,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:07,348 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:07,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,560 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1613342780, now seen corresponding path program 4 times [2019-10-13 17:47:07,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098322965] [2019-10-13 17:47:07,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:47:07,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098322965] [2019-10-13 17:47:07,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203920019] [2019-10-13 17:47:07,680 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 [2019-10-13 17:47:07,787 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:07,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:47:07,816 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:47:07,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698246846] [2019-10-13 17:47:07,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:47:07,817 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:47:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:07,818 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 9 states. [2019-10-13 17:47:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:07,961 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2019-10-13 17:47:07,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:07,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-10-13 17:47:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:07,962 INFO L225 Difference]: With dead ends: 89 [2019-10-13 17:47:07,963 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:47:07,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:47:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2019-10-13 17:47:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:47:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2019-10-13 17:47:07,972 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 39 [2019-10-13 17:47:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:07,972 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2019-10-13 17:47:07,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:47:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2019-10-13 17:47:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:47:07,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:07,974 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:08,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,183 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash 306051690, now seen corresponding path program 5 times [2019-10-13 17:47:08,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:08,185 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674440960] [2019-10-13 17:47:08,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,185 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:08,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:08,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674440960] [2019-10-13 17:47:08,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135738204] [2019-10-13 17:47:08,332 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 [2019-10-13 17:47:08,615 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:47:08,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:08,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:47:08,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:08,640 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:08,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:47:08,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696846758] [2019-10-13 17:47:08,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:47:08,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:47:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:08,642 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 10 states. [2019-10-13 17:47:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:08,815 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2019-10-13 17:47:08,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:47:08,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-10-13 17:47:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:08,817 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:47:08,817 INFO L226 Difference]: Without dead ends: 65 [2019-10-13 17:47:08,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-13 17:47:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-10-13 17:47:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:47:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-10-13 17:47:08,836 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 45 [2019-10-13 17:47:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:08,839 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-10-13 17:47:08,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:47:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-10-13 17:47:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 17:47:08,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:08,843 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:09,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,049 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash 835219332, now seen corresponding path program 6 times [2019-10-13 17:47:09,050 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:09,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082204624] [2019-10-13 17:47:09,051 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:09,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082204624] [2019-10-13 17:47:09,196 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818445579] [2019-10-13 17:47:09,196 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 [2019-10-13 17:47:09,495 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:47:09,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:09,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:47:09,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:09,524 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:09,524 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 17:47:09,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963258107] [2019-10-13 17:47:09,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:47:09,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:09,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:47:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:47:09,526 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 11 states. [2019-10-13 17:47:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:09,702 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2019-10-13 17:47:09,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:47:09,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-13 17:47:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:09,703 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:47:09,703 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 17:47:09,704 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:47:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 17:47:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2019-10-13 17:47:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:47:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-10-13 17:47:09,712 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 51 [2019-10-13 17:47:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:09,712 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-10-13 17:47:09,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:47:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-10-13 17:47:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:47:09,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:09,714 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:09,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,919 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:09,920 INFO L82 PathProgramCache]: Analyzing trace with hash -653496918, now seen corresponding path program 7 times [2019-10-13 17:47:09,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:09,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143304640] [2019-10-13 17:47:09,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:10,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143304640] [2019-10-13 17:47:10,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969338181] [2019-10-13 17:47:10,063 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 [2019-10-13 17:47:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:10,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:10,156 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:10,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:47:10,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093562314] [2019-10-13 17:47:10,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:47:10,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:10,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:47:10,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:10,158 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2019-10-13 17:47:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:10,326 INFO L93 Difference]: Finished difference Result 116 states and 150 transitions. [2019-10-13 17:47:10,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:47:10,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-10-13 17:47:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:10,329 INFO L225 Difference]: With dead ends: 116 [2019-10-13 17:47:10,329 INFO L226 Difference]: Without dead ends: 77 [2019-10-13 17:47:10,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-13 17:47:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-10-13 17:47:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:47:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-10-13 17:47:10,337 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 57 [2019-10-13 17:47:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:10,338 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-10-13 17:47:10,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:47:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-10-13 17:47:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:47:10,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:10,339 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:10,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:10,543 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash -796092604, now seen corresponding path program 8 times [2019-10-13 17:47:10,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:10,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522019151] [2019-10-13 17:47:10,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:10,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522019151] [2019-10-13 17:47:10,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515603910] [2019-10-13 17:47:10,702 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 [2019-10-13 17:47:10,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:10,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:10,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:10,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:10,801 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:10,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:47:10,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651664121] [2019-10-13 17:47:10,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:10,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:10,803 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 13 states. [2019-10-13 17:47:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:10,975 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2019-10-13 17:47:10,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:47:10,975 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-10-13 17:47:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:10,976 INFO L225 Difference]: With dead ends: 125 [2019-10-13 17:47:10,976 INFO L226 Difference]: Without dead ends: 83 [2019-10-13 17:47:10,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-13 17:47:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2019-10-13 17:47:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:47:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2019-10-13 17:47:10,998 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 63 [2019-10-13 17:47:10,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:10,998 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2019-10-13 17:47:10,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:10,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2019-10-13 17:47:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 17:47:10,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:10,999 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:11,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:11,202 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash -802008854, now seen corresponding path program 9 times [2019-10-13 17:47:11,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:11,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763516982] [2019-10-13 17:47:11,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:11,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763516982] [2019-10-13 17:47:11,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646462045] [2019-10-13 17:47:11,333 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 [2019-10-13 17:47:12,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 17:47:12,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:12,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:47:12,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 25 proven. 117 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:12,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:12,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2019-10-13 17:47:12,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519915881] [2019-10-13 17:47:12,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:47:12,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:47:12,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:12,406 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 16 states. [2019-10-13 17:47:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,622 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2019-10-13 17:47:12,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:12,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-10-13 17:47:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,623 INFO L225 Difference]: With dead ends: 136 [2019-10-13 17:47:12,623 INFO L226 Difference]: Without dead ends: 91 [2019-10-13 17:47:12,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-13 17:47:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-13 17:47:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:47:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2019-10-13 17:47:12,631 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 69 [2019-10-13 17:47:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,631 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2019-10-13 17:47:12,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:47:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2019-10-13 17:47:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 17:47:12,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,635 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:12,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:12,836 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:12,836 INFO L82 PathProgramCache]: Analyzing trace with hash -888429526, now seen corresponding path program 10 times [2019-10-13 17:47:12,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:12,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122010896] [2019-10-13 17:47:12,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:13,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122010896] [2019-10-13 17:47:13,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595322754] [2019-10-13 17:47:13,006 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 [2019-10-13 17:47:14,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:14,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:14,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:47:14,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:14,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:14,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:47:14,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791493015] [2019-10-13 17:47:14,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:47:14,200 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:14,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:47:14,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:14,201 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand 16 states. [2019-10-13 17:47:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:14,452 INFO L93 Difference]: Finished difference Result 152 states and 198 transitions. [2019-10-13 17:47:14,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:14,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-10-13 17:47:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:14,455 INFO L225 Difference]: With dead ends: 152 [2019-10-13 17:47:14,455 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:47:14,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:47:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2019-10-13 17:47:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:47:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2019-10-13 17:47:14,463 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 81 [2019-10-13 17:47:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:14,463 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2019-10-13 17:47:14,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:47:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2019-10-13 17:47:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 17:47:14,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:14,465 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:14,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,674 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1427838660, now seen corresponding path program 11 times [2019-10-13 17:47:14,675 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:14,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949707970] [2019-10-13 17:47:14,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 17:47:14,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949707970] [2019-10-13 17:47:14,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666827505] [2019-10-13 17:47:14,855 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