/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:20:08,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:20:08,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:20:08,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:20:08,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:20:08,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:20:08,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:20:08,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:20:08,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:20:08,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:20:08,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:20:08,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:20:08,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:20:08,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:20:08,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:20:08,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:20:08,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:20:08,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:20:08,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:20:08,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:20:08,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:20:08,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:20:08,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:20:08,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:20:08,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:20:08,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:20:08,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:20:08,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:20:08,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:20:08,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:20:08,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:20:08,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:20:08,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:20:08,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:20:08,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:20:08,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:20:08,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:20:08,506 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:20:08,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:20:08,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:20:08,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:20:08,509 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:20:08,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:20:08,509 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:20:08,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:20:08,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:20:08,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:20:08,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:20:08,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:20:08,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:20:08,512 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:20:08,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:20:08,512 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:20:08,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:20:08,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:20:08,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:20:08,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:20:08,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:20:08,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:20:08,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:20:08,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:20:08,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:20:08,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:20:08,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:20:08,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:20:08,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:20:08,830 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:20:08,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:20:08,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:20:08,855 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:20:08,855 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:20:08,856 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-11-06 21:20:08,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/972041abe/b380ba2a95e74dc6a72a6690f908e3d8/FLAG138abf66a [2019-11-06 21:20:09,391 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:20:09,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-11-06 21:20:09,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/972041abe/b380ba2a95e74dc6a72a6690f908e3d8/FLAG138abf66a [2019-11-06 21:20:09,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/972041abe/b380ba2a95e74dc6a72a6690f908e3d8 [2019-11-06 21:20:09,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:20:09,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:20:09,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:20:09,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:20:09,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:20:09,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:20:09" (1/1) ... [2019-11-06 21:20:09,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fac3e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:09, skipping insertion in model container [2019-11-06 21:20:09,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:20:09" (1/1) ... [2019-11-06 21:20:09,825 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:20:09,842 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:20:10,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:20:10,009 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:20:10,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:20:10,042 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:20:10,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10 WrapperNode [2019-11-06 21:20:10,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:20:10,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:20:10,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:20:10,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:20:10,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... [2019-11-06 21:20:10,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:20:10,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:20:10,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:20:10,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:20:10,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:20:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:20:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:20:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:20:10,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:20:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:20:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:20:10,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:20:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:20:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:20:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:20:10,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:20:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:20:10,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:20:10,413 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:20:10,413 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:20:10,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:20:10 BoogieIcfgContainer [2019-11-06 21:20:10,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:20:10,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:20:10,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:20:10,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:20:10,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:20:09" (1/3) ... [2019-11-06 21:20:10,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd8cea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:20:10, skipping insertion in model container [2019-11-06 21:20:10,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:20:10" (2/3) ... [2019-11-06 21:20:10,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd8cea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:20:10, skipping insertion in model container [2019-11-06 21:20:10,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:20:10" (3/3) ... [2019-11-06 21:20:10,440 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2019-11-06 21:20:10,472 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:20:10,493 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:20:10,524 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:20:10,555 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:20:10,555 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:20:10,555 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:20:10,555 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:20:10,556 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:20:10,556 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:20:10,556 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:20:10,556 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:20:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-06 21:20:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-06 21:20:10,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:20:10,576 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:20:10,578 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:20:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:20:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2019-11-06 21:20:10,590 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:20:10,590 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897843166] [2019-11-06 21:20:10,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:20:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:10,769 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897843166] [2019-11-06 21:20:10,770 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:20:10,770 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:20:10,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997336427] [2019-11-06 21:20:10,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:20:10,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:20:10,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:20:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:20:10,794 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-06 21:20:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:20:10,870 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-11-06 21:20:10,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:20:10,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-06 21:20:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:20:10,883 INFO L225 Difference]: With dead ends: 34 [2019-11-06 21:20:10,883 INFO L226 Difference]: Without dead ends: 14 [2019-11-06 21:20:10,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:20:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-06 21:20:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-06 21:20:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-06 21:20:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-06 21:20:10,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-06 21:20:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:20:10,934 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-06 21:20:10,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:20:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-06 21:20:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-06 21:20:10,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:20:10,935 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:20:10,936 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:20:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:20:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2019-11-06 21:20:10,937 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:20:10,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533761054] [2019-11-06 21:20:10,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:20:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:11,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533761054] [2019-11-06 21:20:11,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:20:11,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:20:11,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170918105] [2019-11-06 21:20:11,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:20:11,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:20:11,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:20:11,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:20:11,059 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2019-11-06 21:20:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:20:11,116 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-06 21:20:11,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:20:11,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-06 21:20:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:20:11,119 INFO L225 Difference]: With dead ends: 22 [2019-11-06 21:20:11,119 INFO L226 Difference]: Without dead ends: 16 [2019-11-06 21:20:11,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:20:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-06 21:20:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-06 21:20:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-06 21:20:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-06 21:20:11,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-06 21:20:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:20:11,127 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-06 21:20:11,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:20:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-06 21:20:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 21:20:11,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:20:11,128 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:20:11,128 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:20:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:20:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2019-11-06 21:20:11,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:20:11,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491732720] [2019-11-06 21:20:11,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:20:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:11,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491732720] [2019-11-06 21:20:11,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724461140] [2019-11-06 21:20:11,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:20:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 21:20:11,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:20:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:11,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:20:11,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 21:20:11,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848362638] [2019-11-06 21:20:11,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:20:11,343 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:20:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:20:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:20:11,345 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2019-11-06 21:20:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:20:11,408 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-06 21:20:11,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:20:11,409 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-06 21:20:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:20:11,410 INFO L225 Difference]: With dead ends: 24 [2019-11-06 21:20:11,410 INFO L226 Difference]: Without dead ends: 18 [2019-11-06 21:20:11,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:20:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-06 21:20:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-06 21:20:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-06 21:20:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-06 21:20:11,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-06 21:20:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:20:11,416 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-06 21:20:11,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:20:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-06 21:20:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 21:20:11,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:20:11,418 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:20:11,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:20:11,623 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:20:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:20:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2019-11-06 21:20:11,624 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:20:11,625 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176551620] [2019-11-06 21:20:11,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:20:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:11,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176551620] [2019-11-06 21:20:11,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301459997] [2019-11-06 21:20:11,699 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:20:11,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:20:11,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:20:11,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 21:20:11,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:20:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:11,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:20:11,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 21:20:11,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894994636] [2019-11-06 21:20:11,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:20:11,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:20:11,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:20:11,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:20:11,762 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2019-11-06 21:20:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:20:11,805 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-06 21:20:11,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:20:11,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-06 21:20:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:20:11,806 INFO L225 Difference]: With dead ends: 26 [2019-11-06 21:20:11,806 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 21:20:11,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:20:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 21:20:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-06 21:20:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 21:20:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-06 21:20:11,813 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-11-06 21:20:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:20:11,813 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-06 21:20:11,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:20:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-06 21:20:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:20:11,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:20:11,814 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:20:12,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:20:12,022 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:20:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:20:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2019-11-06 21:20:12,023 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:20:12,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484770183] [2019-11-06 21:20:12,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:20:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:20:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:20:12,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484770183] [2019-11-06 21:20:12,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409200650] [2019-11-06 21:20:12,136 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:20:12,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 21:20:12,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:20:12,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 21:20:12,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:20:12,234 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 15 treesize of output 11 [2019-11-06 21:20:12,235 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:20:12,244 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:20:12,245 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:20:12,245 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-06 21:20:12,328 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:20:12,329 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-11-06 21:20:12,330 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-06 21:20:12,343 INFO L567 ElimStorePlain]: treesize reduction 11, result has 47.6 percent of original size [2019-11-06 21:20:12,344 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:20:12,344 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:27, output treesize:7 [2019-11-06 21:20:12,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:20:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:20:12,405 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:20:12,405 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2019-11-06 21:20:12,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316942783] [2019-11-06 21:20:12,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:20:12,406 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:20:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:20:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:20:12,407 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2019-11-06 21:20:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:20:14,564 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-06 21:20:14,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:20:14,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-06 21:20:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:20:14,565 INFO L225 Difference]: With dead ends: 19 [2019-11-06 21:20:14,565 INFO L226 Difference]: Without dead ends: 0 [2019-11-06 21:20:14,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:20:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-06 21:20:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-06 21:20:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-06 21:20:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-06 21:20:14,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-11-06 21:20:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:20:14,568 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-06 21:20:14,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:20:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-06 21:20:14,568 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-06 21:20:14,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:20:14,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-06 21:20:14,835 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-06 21:20:14,835 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-11-06 21:20:14,835 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-06 21:20:14,835 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-06 21:20:14,835 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-06 21:20:14,836 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-06 21:20:14,836 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-06 21:20:14,836 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: (= |#valid| |old(#valid)|) [2019-11-06 21:20:14,836 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2019-11-06 21:20:14,836 INFO L439 ceAbstractionStarter]: At program point L18(line 18) the Hoare annotation is: (and (exists ((v_main_~i~0_10 Int)) (and (< v_main_~i~0_10 1024) (<= main_~i~0 (+ v_main_~i~0_10 1)) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))))) (<= 1023 |main_#t~mem1|) (exists ((v_main_~i~0_10 Int)) (and (< v_main_~i~0_10 1024) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))) (<= 1023 v_main_~i~0_10))) (< |main_#t~mem1| 1024)) [2019-11-06 21:20:14,837 INFO L443 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2019-11-06 21:20:14,837 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2019-11-06 21:20:14,837 INFO L443 ceAbstractionStarter]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2019-11-06 21:20:14,837 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 16) the Hoare annotation is: (or (exists ((v_main_~i~0_10 Int)) (and (< v_main_~i~0_10 1024) (<= main_~i~0 (+ v_main_~i~0_10 1)) (= v_main_~i~0_10 (select (select |#memory_int| |main_~#A~0.base|) (+ (* v_main_~i~0_10 4) |main_~#A~0.offset|))))) (= main_~i~0 0)) [2019-11-06 21:20:14,837 INFO L443 ceAbstractionStarter]: For program point L14-4(lines 14 16) no Hoare annotation was computed. [2019-11-06 21:20:14,837 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-06 21:20:14,838 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-06 21:20:14,838 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-06 21:20:14,838 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-06 21:20:14,838 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-06 21:20:14,838 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-06 21:20:14,844 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,849 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,849 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,849 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,851 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-06 21:20:14,855 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,855 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,855 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,856 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,856 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-06 21:20:14,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:20:14 BoogieIcfgContainer [2019-11-06 21:20:14,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 21:20:14,860 INFO L168 Benchmark]: Toolchain (without parser) took 5051.49 ms. Allocated memory was 138.9 MB in the beginning and 234.9 MB in the end (delta: 95.9 MB). Free memory was 104.2 MB in the beginning and 154.7 MB in the end (delta: -50.6 MB). Peak memory consumption was 45.4 MB. Max. memory is 7.1 GB. [2019-11-06 21:20:14,861 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 21:20:14,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.68 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-11-06 21:20:14,864 INFO L168 Benchmark]: Boogie Preprocessor took 111.51 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 94.2 MB in the beginning and 178.9 MB in the end (delta: -84.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-11-06 21:20:14,865 INFO L168 Benchmark]: RCFGBuilder took 259.45 ms. Allocated memory is still 200.3 MB. Free memory was 178.9 MB in the beginning and 165.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:20:14,866 INFO L168 Benchmark]: TraceAbstraction took 4435.33 ms. Allocated memory was 200.3 MB in the beginning and 234.9 MB in the end (delta: 34.6 MB). Free memory was 165.8 MB in the beginning and 154.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. [2019-11-06 21:20:14,870 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 138.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.68 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 94.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.51 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 94.2 MB in the beginning and 178.9 MB in the end (delta: -84.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.45 ms. Allocated memory is still 200.3 MB. Free memory was 178.9 MB in the beginning and 165.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4435.33 ms. Allocated memory was 200.3 MB in the beginning and 234.9 MB in the end (delta: 34.6 MB). Free memory was 165.8 MB in the beginning and 154.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 45.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant [2019-11-06 21:20:14,880 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,880 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,880 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,881 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,881 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-06 21:20:14,881 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,881 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,882 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,882 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_10,QUANTIFIED] [2019-11-06 21:20:14,882 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (\exists v_main_~i~0_10 : int :: (v_main_~i~0_10 < 1024 && i <= v_main_~i~0_10 + 1) && v_main_~i~0_10 == unknown-#memory_int-unknown[A][v_main_~i~0_10 * 4 + A]) || i == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 24 SDslu, 67 SDs, 0 SdLazy, 103 SolverSat, 12 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 88 HoareAnnotationTreeSize, 11 FomulaSimplifications, 50 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 120 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 112 ConstructedInterpolants, 2 QuantifiedInterpolants, 3981 SizeOfPredicates, 8 NumberOfNonLiveVariables, 167 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 9/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...