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/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:21,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:21,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:21,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:21,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:21,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:21,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:21,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:21,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:21,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:21,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:21,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:21,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:21,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:21,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:21,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:21,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:21,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:21,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:21,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:21,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:21,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:21,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:21,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:21,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:21,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:21,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:21,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:21,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:21,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:21,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:21,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:21,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:21,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:21,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:21,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:21,498 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 [2019-10-14 23:16:21,512 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:21,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:21,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:21,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:21,514 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:21,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:21,515 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:21,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:21,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:21,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:21,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:21,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:21,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:21,516 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:21,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:21,516 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:21,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:21,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:21,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:21,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:21,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:21,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:21,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:21,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:21,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:21,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:21,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:21,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:21,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:21,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:21,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:21,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:21,818 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:21,818 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:21,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-10-14 23:16:21,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bdb7cac/04e5b5507171429f9822d75a6fc3446a/FLAG0313ff0f9 [2019-10-14 23:16:22,346 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:22,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-10-14 23:16:22,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bdb7cac/04e5b5507171429f9822d75a6fc3446a/FLAG0313ff0f9 [2019-10-14 23:16:22,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bdb7cac/04e5b5507171429f9822d75a6fc3446a [2019-10-14 23:16:22,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:22,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:22,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:22,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:22,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:22,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:22,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b10157a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22, skipping insertion in model container [2019-10-14 23:16:22,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:22,726 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:22,747 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:22,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:22,938 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:22,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:22,974 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:22,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22 WrapperNode [2019-10-14 23:16:22,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:22,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:22,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:22,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:23,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (1/1) ... [2019-10-14 23:16:23,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:23,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:23,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:23,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:23,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (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 [2019-10-14 23:16:23,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-10-14 23:16:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:23,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:23,160 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:16:23,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:23,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:16:23,160 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-10-14 23:16:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:16:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:23,422 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:23,423 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:23,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:23 BoogieIcfgContainer [2019-10-14 23:16:23,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:23,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:23,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:23,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:23,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:22" (1/3) ... [2019-10-14 23:16:23,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c130939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:23, skipping insertion in model container [2019-10-14 23:16:23,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:22" (2/3) ... [2019-10-14 23:16:23,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c130939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:23, skipping insertion in model container [2019-10-14 23:16:23,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:23" (3/3) ... [2019-10-14 23:16:23,442 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-10-14 23:16:23,453 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:23,461 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:23,489 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:23,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:23,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:23,514 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:23,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:23,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:23,514 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:23,514 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:23,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 23:16:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:23,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:23,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:23,543 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2019-10-14 23:16:23,557 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:23,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159296046] [2019-10-14 23:16:23,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:23,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:23,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:23,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159296046] [2019-10-14 23:16:23,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:23,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:23,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706154978] [2019-10-14 23:16:23,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:23,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:23,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:23,815 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 23:16:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:23,916 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-10-14 23:16:23,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:23,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-14 23:16:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:23,925 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:16:23,925 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:16:23,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:16:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:16:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:16:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 23:16:23,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-10-14 23:16:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:23,964 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 23:16:23,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 23:16:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:23,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:23,965 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] [2019-10-14 23:16:23,966 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2019-10-14 23:16:23,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:23,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118192071] [2019-10-14 23:16:23,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:23,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:23,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:24,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118192071] [2019-10-14 23:16:24,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:24,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:16:24,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927997742] [2019-10-14 23:16:24,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:24,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:24,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:24,233 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-14 23:16:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:24,450 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-10-14 23:16:24,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:24,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 23:16:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:24,452 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:16:24,452 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:16:24,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:16:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:16:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:16:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 23:16:24,460 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2019-10-14 23:16:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:24,461 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 23:16:24,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 23:16:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:24,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,462 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] [2019-10-14 23:16:24,463 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2019-10-14 23:16:24,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440344129] [2019-10-14 23:16:24,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:24,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440344129] [2019-10-14 23:16:24,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:24,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:16:24,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465310959] [2019-10-14 23:16:24,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:24,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:24,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:24,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:24,721 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-10-14 23:16:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:24,909 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-14 23:16:24,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:24,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-14 23:16:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:24,911 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:16:24,911 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:16:24,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:24,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:16:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:16:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:16:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 23:16:24,928 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2019-10-14 23:16:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:24,929 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 23:16:24,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 23:16:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:16:24,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,930 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:24,931 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2019-10-14 23:16:24,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239572518] [2019-10-14 23:16:24,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239572518] [2019-10-14 23:16:25,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461921458] [2019-10-14 23:16:25,256 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 [2019-10-14 23:16:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:25,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,430 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:25,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2019-10-14 23:16:25,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916160037] [2019-10-14 23:16:25,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:16:25,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:16:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:25,433 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2019-10-14 23:16:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:25,669 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-10-14 23:16:25,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:25,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-10-14 23:16:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:25,671 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:25,671 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:16:25,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:25,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:16:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:16:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 23:16:25,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-10-14 23:16:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:25,686 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 23:16:25,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:16:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 23:16:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:25,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:25,690 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:25,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:25,905 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1232357626, now seen corresponding path program 2 times [2019-10-14 23:16:25,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:25,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855412973] [2019-10-14 23:16:25,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:16:26,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855412973] [2019-10-14 23:16:26,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601057819] [2019-10-14 23:16:26,299 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 [2019-10-14 23:16:26,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:16:26,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:26,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:26,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:16:26,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:26,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-10-14 23:16:26,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061433520] [2019-10-14 23:16:26,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:26,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:26,458 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2019-10-14 23:16:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:26,776 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-14 23:16:26,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:26,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-14 23:16:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:26,781 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:16:26,781 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:26,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-10-14 23:16:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 23:16:26,797 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2019-10-14 23:16:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:26,798 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 23:16:26,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 23:16:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:26,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:26,802 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:27,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,008 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 1 times [2019-10-14 23:16:27,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:27,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441946197] [2019-10-14 23:16:27,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:29,403 WARN L191 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 163 DAG size of output: 31 [2019-10-14 23:16:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441946197] [2019-10-14 23:16:30,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146143090] [2019-10-14 23:16:30,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:16:30,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:46,318 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-10-14 23:16:46,389 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2019-10-14 23:16:46,390 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:46,401 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:46,402 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 1 [2019-10-14 23:16:46,403 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:46,464 INFO L567 ElimStorePlain]: treesize reduction 280, result has 11.1 percent of original size [2019-10-14 23:16:46,465 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-10-14 23:16:46,465 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-14 23:16:46,465 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-14 23:16:46,466 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:16:46,466 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-10-14 23:16:48,987 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 46 [2019-10-14 23:16:51,202 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-10-14 23:16:51,739 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-10-14 23:16:51,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:51,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:51,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:51,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:51,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:56,389 WARN L191 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-10-14 23:16:56,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:56,802 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-10-14 23:16:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:56,919 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:56,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-10-14 23:16:56,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818937670] [2019-10-14 23:16:56,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:16:56,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:56,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:16:56,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=559, Unknown=5, NotChecked=0, Total=650 [2019-10-14 23:16:56,924 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 26 states. [2019-10-14 23:17:00,109 WARN L191 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-10-14 23:17:03,626 WARN L191 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2019-10-14 23:17:06,772 WARN L191 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-10-14 23:17:07,706 WARN L191 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-14 23:17:08,385 WARN L191 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-14 23:17:10,442 WARN L191 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2019-10-14 23:17:10,721 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82