/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:14:34,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:14:34,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:14:34,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:14:34,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:14:34,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:14:34,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:14:34,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:14:34,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:14:34,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:14:34,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:14:34,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:14:34,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:14:34,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:14:34,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:14:34,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:14:34,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:14:34,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:14:34,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:14:34,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:14:34,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:14:34,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:14:34,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:14:34,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:14:34,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:14:34,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:14:34,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:14:34,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:14:34,854 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 [2019-11-23 22:14:34,868 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:14:34,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:14:34,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:14:34,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:14:34,870 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:14:34,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:14:34,871 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:14:34,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:14:34,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:14:34,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:14:34,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:14:34,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:14:34,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:14:34,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:14:34,872 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:14:34,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:14:34,873 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:14:34,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:14:34,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:14:34,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:14:34,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:14:34,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:14:34,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:14:34,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:14:34,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:14:34,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:14:34,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:14:34,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:14:34,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:14:34,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:14:35,145 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:14:35,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:14:35,166 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:14:35,167 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:14:35,167 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:14:35,168 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2019-11-23 22:14:35,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfcb8e22/3582bf4a29b54e07888bcaaa34e5c9a5/FLAG7e1f8bd5e [2019-11-23 22:14:35,697 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:14:35,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2019-11-23 22:14:35,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfcb8e22/3582bf4a29b54e07888bcaaa34e5c9a5/FLAG7e1f8bd5e [2019-11-23 22:14:36,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfcb8e22/3582bf4a29b54e07888bcaaa34e5c9a5 [2019-11-23 22:14:36,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:14:36,099 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:14:36,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:14:36,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:14:36,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:14:36,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1f63e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36, skipping insertion in model container [2019-11-23 22:14:36,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:14:36,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:14:36,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:14:36,337 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:14:36,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:14:36,489 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:14:36,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36 WrapperNode [2019-11-23 22:14:36,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:14:36,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:14:36,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:14:36,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:14:36,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:14:36,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:14:36,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:14:36,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:14:36,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (1/1) ... [2019-11-23 22:14:36,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:14:36,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:14:36,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:14:36,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:14:36,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (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 [2019-11-23 22:14:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-11-23 22:14:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-11-23 22:14:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:14:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:14:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:14:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:14:37,116 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:14:37,117 INFO L284 CfgBuilder]: Removed 21 assume(true) statements. [2019-11-23 22:14:37,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:14:37 BoogieIcfgContainer [2019-11-23 22:14:37,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:14:37,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:14:37,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:14:37,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:14:37,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:14:36" (1/3) ... [2019-11-23 22:14:37,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3406bb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:14:37, skipping insertion in model container [2019-11-23 22:14:37,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:14:36" (2/3) ... [2019-11-23 22:14:37,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3406bb9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:14:37, skipping insertion in model container [2019-11-23 22:14:37,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:14:37" (3/3) ... [2019-11-23 22:14:37,127 INFO L109 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2019-11-23 22:14:37,136 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:14:37,144 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:14:37,155 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:14:37,181 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:14:37,182 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:14:37,182 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:14:37,182 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:14:37,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:14:37,183 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:14:37,183 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:14:37,183 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:14:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-11-23 22:14:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:14:37,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:37,208 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:37,208 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2019-11-23 22:14:37,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:37,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852289959] [2019-11-23 22:14:37,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:37,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852289959] [2019-11-23 22:14:37,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:37,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:14:37,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24939481] [2019-11-23 22:14:37,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:14:37,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:14:37,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:14:37,440 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2019-11-23 22:14:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:37,548 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2019-11-23 22:14:37,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:14:37,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:14:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:37,569 INFO L225 Difference]: With dead ends: 102 [2019-11-23 22:14:37,569 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:14:37,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:14:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:14:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2019-11-23 22:14:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:14:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 22:14:37,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2019-11-23 22:14:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:37,625 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 22:14:37,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:14:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 22:14:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:14:37,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:37,629 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:37,630 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2019-11-23 22:14:37,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:37,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773863567] [2019-11-23 22:14:37,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:37,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773863567] [2019-11-23 22:14:37,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814436155] [2019-11-23 22:14:37,754 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 [2019-11-23 22:14:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:37,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:14:37,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:37,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:37,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 22:14:37,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685069216] [2019-11-23 22:14:37,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:14:37,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:37,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:14:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:14:37,915 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2019-11-23 22:14:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:38,071 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2019-11-23 22:14:38,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:14:38,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-23 22:14:38,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:38,075 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:14:38,075 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:14:38,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:14:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:14:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-11-23 22:14:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:14:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-23 22:14:38,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2019-11-23 22:14:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:38,103 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-23 22:14:38,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:14:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-23 22:14:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:14:38,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:38,104 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:38,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:38,310 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:38,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2019-11-23 22:14:38,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:38,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612750636] [2019-11-23 22:14:38,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:38,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612750636] [2019-11-23 22:14:38,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580059476] [2019-11-23 22:14:38,468 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:38,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:14:38,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:38,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:38,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 22:14:38,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626002180] [2019-11-23 22:14:38,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:14:38,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:38,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:14:38,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:14:38,580 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 10 states. [2019-11-23 22:14:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:38,761 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2019-11-23 22:14:38,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:14:38,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-23 22:14:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:38,763 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:14:38,763 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:14:38,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:14:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:14:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2019-11-23 22:14:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:14:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2019-11-23 22:14:38,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 15 [2019-11-23 22:14:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:38,771 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2019-11-23 22:14:38,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:14:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2019-11-23 22:14:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:14:38,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:38,772 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:38,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:38,974 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1388100565, now seen corresponding path program 2 times [2019-11-23 22:14:38,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:38,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682008370] [2019-11-23 22:14:38,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:39,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682008370] [2019-11-23 22:14:39,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509620085] [2019-11-23 22:14:39,107 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 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 [2019-11-23 22:14:39,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:39,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:39,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:14:39,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:39,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:39,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 22:14:39,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786051728] [2019-11-23 22:14:39,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:14:39,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:14:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:14:39,234 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 12 states. [2019-11-23 22:14:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:39,430 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-11-23 22:14:39,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:14:39,431 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-11-23 22:14:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:39,432 INFO L225 Difference]: With dead ends: 76 [2019-11-23 22:14:39,434 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:14:39,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:14:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:14:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2019-11-23 22:14:39,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:14:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-23 22:14:39,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 19 [2019-11-23 22:14:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:39,449 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-23 22:14:39,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:14:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-23 22:14:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:14:39,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:39,452 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:39,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:39,655 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 3 times [2019-11-23 22:14:39,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:39,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128954024] [2019-11-23 22:14:39,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:40,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128954024] [2019-11-23 22:14:40,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136644453] [2019-11-23 22:14:40,010 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:40,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:14:40,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:40,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:14:40,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:40,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:40,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-11-23 22:14:40,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336340421] [2019-11-23 22:14:40,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:14:40,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:14:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:14:40,175 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 17 states. [2019-11-23 22:14:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:43,069 INFO L93 Difference]: Finished difference Result 249 states and 311 transitions. [2019-11-23 22:14:43,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-23 22:14:43,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2019-11-23 22:14:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:43,072 INFO L225 Difference]: With dead ends: 249 [2019-11-23 22:14:43,072 INFO L226 Difference]: Without dead ends: 225 [2019-11-23 22:14:43,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1280, Invalid=4572, Unknown=0, NotChecked=0, Total=5852 [2019-11-23 22:14:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-11-23 22:14:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 126. [2019-11-23 22:14:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:14:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2019-11-23 22:14:43,094 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 23 [2019-11-23 22:14:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:43,095 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2019-11-23 22:14:43,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:14:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2019-11-23 22:14:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:14:43,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:43,097 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:43,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:43,298 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1523542023, now seen corresponding path program 4 times [2019-11-23 22:14:43,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:43,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666841746] [2019-11-23 22:14:43,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:43,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666841746] [2019-11-23 22:14:43,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510376748] [2019-11-23 22:14:43,429 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:43,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:14:43,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:43,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:14:43,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:43,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:43,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-23 22:14:43,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932319638] [2019-11-23 22:14:43,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:14:43,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:43,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:14:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:14:43,570 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand 16 states. [2019-11-23 22:14:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:43,845 INFO L93 Difference]: Finished difference Result 279 states and 356 transitions. [2019-11-23 22:14:43,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:14:43,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-11-23 22:14:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:43,848 INFO L225 Difference]: With dead ends: 279 [2019-11-23 22:14:43,848 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 22:14:43,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:14:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 22:14:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2019-11-23 22:14:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:14:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2019-11-23 22:14:43,865 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 27 [2019-11-23 22:14:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:43,866 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2019-11-23 22:14:43,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:14:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2019-11-23 22:14:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:14:43,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:43,870 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:44,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:44,075 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:44,075 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 5 times [2019-11-23 22:14:44,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:44,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537345171] [2019-11-23 22:14:44,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:14:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:14:44,151 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 22:14:44,152 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 22:14:44,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:14:44 BoogieIcfgContainer [2019-11-23 22:14:44,209 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:14:44,211 INFO L168 Benchmark]: Toolchain (without parser) took 8112.27 ms. Allocated memory was 144.7 MB in the beginning and 300.4 MB in the end (delta: 155.7 MB). Free memory was 102.4 MB in the beginning and 233.1 MB in the end (delta: -130.7 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:14:44,212 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 144.7 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. [2019-11-23 22:14:44,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.97 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 180.0 MB in the end (delta: -77.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:14:44,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 177.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-11-23 22:14:44,214 INFO L168 Benchmark]: Boogie Preprocessor took 41.79 ms. Allocated memory is still 201.9 MB. Free memory was 177.6 MB in the beginning and 175.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:14:44,215 INFO L168 Benchmark]: RCFGBuilder took 532.32 ms. Allocated memory is still 201.9 MB. Free memory was 175.5 MB in the beginning and 149.1 MB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2019-11-23 22:14:44,216 INFO L168 Benchmark]: TraceAbstraction took 7089.42 ms. Allocated memory was 201.9 MB in the beginning and 300.4 MB in the end (delta: 98.6 MB). Free memory was 148.4 MB in the beginning and 233.1 MB in the end (delta: -84.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-11-23 22:14:44,222 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 144.7 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 389.97 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 180.0 MB in the end (delta: -77.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 54.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 177.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.79 ms. Allocated memory is still 201.9 MB. Free memory was 177.6 MB in the beginning and 175.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 532.32 ms. Allocated memory is still 201.9 MB. Free memory was 175.5 MB in the beginning and 149.1 MB in the end (delta: 26.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7089.42 ms. Allocated memory was 201.9 MB in the beginning and 300.4 MB in the end (delta: 98.6 MB). Free memory was 148.4 MB in the beginning and 233.1 MB in the end (delta: -84.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_real at line 96, overapproximation of someBinaryArithmeticDOUBLEoperation at line 98. Possible FailurePath: [L69] double a[50][50], b[50], x[50]; VAL [a={3:0}, b={2:0}, x={4:0}] [L86] int i, j, nmax = 50, n = 5, chkerr; [L87] double eps, w; [L89] eps = 1.0e-6 [L91] i = 0 VAL [a={3:0}, b={2:0}, x={4:0}] [L91] COND TRUE i <= n [L93] w = 0.0 [L94] j = 0 VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND TRUE i == j [L97] EXPR a[i][j] [L97] a[i][j] *= 10.0 [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={3:0}, b={2:0}, x={4:0}] [L97] COND FALSE !(i == j) VAL [a={3:0}, b={2:0}, x={4:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={3:0}, b={2:0}, x={4:0}] [L94] COND FALSE !(j <= n) VAL [a={3:0}, b={2:0}, x={4:0}] [L4] COND TRUE !(cond) VAL [a={3:0}, b={2:0}, x={4:0}] [L5] __VERIFIER_error() VAL [a={3:0}, b={2:0}, x={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Result: UNSAFE, OverallTime: 7.0s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 899 SDslu, 318 SDs, 0 SdLazy, 639 SolverSat, 288 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 212 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=6, 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, 6 MinimizatonAttempts, 192 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 186 ConstructedInterpolants, 0 QuantifiedInterpolants, 28854 SizeOfPredicates, 10 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/190 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...