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-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:37,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:37,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:37,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:37,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:37,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:37,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:37,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:37,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:37,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:37,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:37,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:37,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:37,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:37,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:37,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:37,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:37,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:37,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:37,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:37,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:37,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:37,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:37,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:37,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:37,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:37,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:37,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:37,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:37,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:37,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:37,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:37,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:37,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:37,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:37,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:37,069 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 23:15:37,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:37,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:37,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:37,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:37,086 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:37,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:37,086 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:37,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:37,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:37,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:37,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:37,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:37,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:37,087 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:37,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:37,088 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:37,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:37,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:37,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:37,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:37,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:37,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:37,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:37,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:37,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:37,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:37,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:37,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:37,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:37,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:37,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:37,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:37,393 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:37,393 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:37,394 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2019-10-14 23:15:37,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1c438f8/bf6c967f3d6e43b18910cc5b9c8a5e80/FLAG2406f6d7c [2019-10-14 23:15:37,914 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:37,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2019-10-14 23:15:37,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1c438f8/bf6c967f3d6e43b18910cc5b9c8a5e80/FLAG2406f6d7c [2019-10-14 23:15:38,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a1c438f8/bf6c967f3d6e43b18910cc5b9c8a5e80 [2019-10-14 23:15:38,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:38,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:38,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:38,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:38,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:38,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c279152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,371 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:38,388 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:38,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:38,604 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:38,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:38,644 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:38,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38 WrapperNode [2019-10-14 23:15:38,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:38,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:38,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:38,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:38,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (1/1) ... [2019-10-14 23:15:38,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:38,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:38,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:38,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:38,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (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 23:15:38,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:38,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:38,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:15:38,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:38,985 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:38,986 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:15:38,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:38 BoogieIcfgContainer [2019-10-14 23:15:38,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:38,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:38,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:38,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:38,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:38" (1/3) ... [2019-10-14 23:15:38,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754606f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:38" (2/3) ... [2019-10-14 23:15:38,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754606f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:38" (3/3) ... [2019-10-14 23:15:38,996 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2019-10-14 23:15:39,006 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:39,014 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:39,032 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:39,087 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:39,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:39,087 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:39,088 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:39,088 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:39,088 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:39,088 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:39,089 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:15:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:15:39,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,118 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,119 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2009018560, now seen corresponding path program 1 times [2019-10-14 23:15:39,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54403535] [2019-10-14 23:15:39,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,253 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 23:15:39,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54403535] [2019-10-14 23:15:39,254 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:39,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:15:39,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482504288] [2019-10-14 23:15:39,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:15:39,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:15:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:39,272 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:15:39,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,296 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-10-14 23:15:39,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:15:39,297 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:15:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,306 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:15:39,306 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:15:39,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:15:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:15:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:15:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:15:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:15:39,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-14 23:15:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,352 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:15:39,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:15:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:15:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:15:39,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,353 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,354 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2019177291, now seen corresponding path program 1 times [2019-10-14 23:15:39,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503545285] [2019-10-14 23:15:39,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,445 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 23:15:39,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503545285] [2019-10-14 23:15:39,445 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:39,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:15:39,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4816086] [2019-10-14 23:15:39,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:15:39,448 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:15:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:15:39,449 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-14 23:15:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,546 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:15:39,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:39,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:15:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,549 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:15:39,549 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:15:39,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:15:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 23:15:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:15:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-14 23:15:39,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2019-10-14 23:15:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,564 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-14 23:15:39,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:15:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-14 23:15:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:15:39,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,566 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,566 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1543015754, now seen corresponding path program 1 times [2019-10-14 23:15:39,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119506925] [2019-10-14 23:15:39,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119506925] [2019-10-14 23:15:39,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25346287] [2019-10-14 23:15:39,635 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 23:15:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:15:39,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:39,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,760 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:39,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-10-14 23:15:39,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562748394] [2019-10-14 23:15:39,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:15:39,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:15:39,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:39,763 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2019-10-14 23:15:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,850 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-10-14 23:15:39,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:39,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-10-14 23:15:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,854 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:15:39,855 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:15:39,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:15:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2019-10-14 23:15:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:15:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 23:15:39,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-14 23:15:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,869 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 23:15:39,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:15:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 23:15:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:15:39,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,871 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,076 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -595645528, now seen corresponding path program 1 times [2019-10-14 23:15:40,077 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897127219] [2019-10-14 23:15:40,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,078 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897127219] [2019-10-14 23:15:40,167 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:40,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:15:40,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392833888] [2019-10-14 23:15:40,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:40,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:40,171 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-10-14 23:15:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,252 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-10-14 23:15:40,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:15:40,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-10-14 23:15:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,254 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:15:40,254 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:40,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-10-14 23:15:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:15:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-14 23:15:40,261 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2019-10-14 23:15:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,262 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-14 23:15:40,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-14 23:15:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:15:40,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,263 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,263 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1695932857, now seen corresponding path program 1 times [2019-10-14 23:15:40,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631153123] [2019-10-14 23:15:40,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631153123] [2019-10-14 23:15:40,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958269796] [2019-10-14 23:15:40,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2019-10-14 23:15:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:40,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:40,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2019-10-14 23:15:40,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409257502] [2019-10-14 23:15:40,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:15:40,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:15:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:40,547 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2019-10-14 23:15:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,841 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-10-14 23:15:40,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:40,842 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-10-14 23:15:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,843 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:15:40,843 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:15:40,844 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:15:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:15:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:15:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:15:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:15:40,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-10-14 23:15:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,846 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:15:40,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:15:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:15:40,846 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:15:41,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:15:41,217 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:15:41,217 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:41,217 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:15:41,218 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:15:41,218 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:15:41,218 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:15:41,218 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2019-10-14 23:15:41,218 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2019-10-14 23:15:41,218 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-10-14 23:15:41,219 INFO L439 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (< main_~m~0 main_~n~0) .cse1) (and (<= main_~n~0 0) .cse0 (<= main_~x~0 0) .cse1) (and .cse0 (<= main_~m~0 0) .cse1))) [2019-10-14 23:15:41,219 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-10-14 23:15:41,219 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2019-10-14 23:15:41,219 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2019-10-14 23:15:41,219 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 19) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (< main_~m~0 main_~n~0) .cse1) (and .cse0 (<= main_~m~0 0) .cse1))) [2019-10-14 23:15:41,220 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 19) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= 0 main_~x~0))) (or (and .cse0 (< main_~m~0 main_~n~0) .cse1) (and (<= main_~n~0 0) .cse0 (<= main_~x~0 0) .cse1) (and .cse0 (<= main_~m~0 0) .cse1))) [2019-10-14 23:15:41,220 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-14 23:15:41,220 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-14 23:15:41,220 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:41,220 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-14 23:15:41,220 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-14 23:15:41,221 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-14 23:15:41,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:15:41 BoogieIcfgContainer [2019-10-14 23:15:41,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:15:41,238 INFO L168 Benchmark]: Toolchain (without parser) took 2882.66 ms. Allocated memory was 137.9 MB in the beginning and 233.8 MB in the end (delta: 95.9 MB). Free memory was 103.1 MB in the beginning and 137.8 MB in the end (delta: -34.7 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:41,239 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:15:41,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.49 ms. Allocated memory is still 137.9 MB. Free memory was 102.9 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:41,241 INFO L168 Benchmark]: Boogie Preprocessor took 115.55 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 179.7 MB in the end (delta: -86.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:41,242 INFO L168 Benchmark]: RCFGBuilder took 223.00 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 169.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:41,243 INFO L168 Benchmark]: TraceAbstraction took 2246.77 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 168.4 MB in the beginning and 137.8 MB in the end (delta: 30.6 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:15:41,247 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.49 ms. Allocated memory is still 137.9 MB. Free memory was 102.9 MB in the beginning and 93.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.55 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 179.7 MB in the end (delta: -86.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 223.00 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 169.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2246.77 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 168.4 MB in the beginning and 137.8 MB in the end (delta: 30.6 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. * 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 Derived loop invariant: ((0 <= m && m < n) && 0 <= x) || ((0 <= m && m <= 0) && 0 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 71 SDtfs, 75 SDslu, 184 SDs, 0 SdLazy, 165 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, 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, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 28 NumberOfFragments, 94 HoareAnnotationTreeSize, 17 FomulaSimplifications, 254 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 3036 SizeOfPredicates, 7 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 5/10 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...