/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/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:29,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:29,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:29,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:15:29,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:15:29,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:15:29,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:15:29,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:15:29,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:15:29,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:15:29,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:15:29,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 22:15:29,992 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 22:15:30,006 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:30,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:30,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:30,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:30,008 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:30,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:30,009 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:30,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:30,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:30,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:30,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:30,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:30,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:30,010 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:30,010 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:30,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:30,011 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:30,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:30,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:30,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:30,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:30,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:30,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:30,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:30,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:30,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:30,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:30,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:30,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:30,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:30,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:30,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:30,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:30,291 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:30,291 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:30,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2019-11-23 22:15:30,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5cc825c9/671f668db0d3423498a1e2be1d6ae752/FLAGa2f94abfa [2019-11-23 22:15:30,845 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:30,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2019-11-23 22:15:30,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5cc825c9/671f668db0d3423498a1e2be1d6ae752/FLAGa2f94abfa [2019-11-23 22:15:31,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5cc825c9/671f668db0d3423498a1e2be1d6ae752 [2019-11-23 22:15:31,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:31,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:31,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:31,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:31,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:31,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb6fecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31, skipping insertion in model container [2019-11-23 22:15:31,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:31,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:31,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:31,492 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:31,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:31,523 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:31,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31 WrapperNode [2019-11-23 22:15:31,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:31,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:31,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:31,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:31,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:31,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:31,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:31,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:31,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (1/1) ... [2019-11-23 22:15:31,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:31,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:31,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:31,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:31,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (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 22:15:31,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:31,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:31,836 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:31,836 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:15:31,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:31 BoogieIcfgContainer [2019-11-23 22:15:31,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:31,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:31,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:31,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:31,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:31" (1/3) ... [2019-11-23 22:15:31,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eeb98e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:31, skipping insertion in model container [2019-11-23 22:15:31,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:31" (2/3) ... [2019-11-23 22:15:31,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eeb98e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:31, skipping insertion in model container [2019-11-23 22:15:31,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:31" (3/3) ... [2019-11-23 22:15:31,845 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2019-11-23 22:15:31,852 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:31,858 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:31,869 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:31,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:31,892 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:31,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:31,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:31,892 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:31,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:31,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:31,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 22:15:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:15:31,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:31,910 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:15:31,910 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash 29776202, now seen corresponding path program 1 times [2019-11-23 22:15:31,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:31,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878932049] [2019-11-23 22:15:31,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,033 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 22:15:32,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878932049] [2019-11-23 22:15:32,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:32,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:32,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030385380] [2019-11-23 22:15:32,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:15:32,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:15:32,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:32,053 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 22:15:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:32,132 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2019-11-23 22:15:32,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:15:32,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 22:15:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:32,157 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:15:32,158 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 22:15:32,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 22:15:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-11-23 22:15:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:15:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-23 22:15:32,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2019-11-23 22:15:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:32,215 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-23 22:15:32,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:15:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-23 22:15:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:15:32,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,216 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,216 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1396608660, now seen corresponding path program 1 times [2019-11-23 22:15:32,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188564023] [2019-11-23 22:15:32,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,259 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 22:15:32,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188564023] [2019-11-23 22:15:32,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412397442] [2019-11-23 22:15:32,260 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 22:15:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:15:32,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:32,318 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 22:15:32,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:32,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-23 22:15:32,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031895114] [2019-11-23 22:15:32,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:32,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:15:32,322 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2019-11-23 22:15:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:32,355 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-23 22:15:32,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:32,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:15:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:32,357 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:15:32,357 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:15:32,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 22:15:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:15:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-23 22:15:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:15:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-23 22:15:32,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2019-11-23 22:15:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:32,363 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-23 22:15:32,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-23 22:15:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:15:32,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,364 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:32,567 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2057893618, now seen corresponding path program 2 times [2019-11-23 22:15:32,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410350080] [2019-11-23 22:15:32,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:32,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410350080] [2019-11-23 22:15:32,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846439588] [2019-11-23 22:15:32,637 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:32,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:32,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:32,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:15:32,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:32,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:32,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-23 22:15:32,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827402622] [2019-11-23 22:15:32,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:15:32,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:15:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:32,678 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2019-11-23 22:15:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:32,714 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-23 22:15:32,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:15:32,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-23 22:15:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:32,717 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:15:32,717 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 22:15:32,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 22:15:32,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-23 22:15:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:15:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-23 22:15:32,723 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-11-23 22:15:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:32,725 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-23 22:15:32,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:15:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-23 22:15:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:15:32,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,726 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:32,929 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1897578448, now seen corresponding path program 3 times [2019-11-23 22:15:32,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925144915] [2019-11-23 22:15:32,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:32,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925144915] [2019-11-23 22:15:32,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287259030] [2019-11-23 22:15:32,999 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:33,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:15:33,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:33,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:15:33,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:33,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:33,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-23 22:15:33,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314267560] [2019-11-23 22:15:33,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:15:33,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:15:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:33,034 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-11-23 22:15:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:33,079 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-23 22:15:33,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:15:33,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 22:15:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:33,083 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:15:33,083 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:15:33,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:15:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-23 22:15:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:15:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-23 22:15:33,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-11-23 22:15:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:33,090 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-23 22:15:33,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:15:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-23 22:15:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:15:33,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:33,091 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2019-11-23 22:15:33,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:33,296 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1841444562, now seen corresponding path program 4 times [2019-11-23 22:15:33,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:33,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324342573] [2019-11-23 22:15:33,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:33,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324342573] [2019-11-23 22:15:33,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433762407] [2019-11-23 22:15:33,396 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-23 22:15:33,437 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:33,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:33,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:33,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:33,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:33,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-23 22:15:33,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472441461] [2019-11-23 22:15:33,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:15:33,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:15:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:33,454 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-11-23 22:15:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:33,501 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-23 22:15:33,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:15:33,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-23 22:15:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:33,504 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:15:33,504 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:15:33,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:15:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 22:15:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:15:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-23 22:15:33,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-11-23 22:15:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:33,514 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-23 22:15:33,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:15:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-23 22:15:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:15:33,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:33,516 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2019-11-23 22:15:33,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:33,717 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash 154930420, now seen corresponding path program 5 times [2019-11-23 22:15:33,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:33,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550868237] [2019-11-23 22:15:33,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:33,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550868237] [2019-11-23 22:15:33,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588780519] [2019-11-23 22:15:33,806 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:33,852 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:15:33,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:33,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:33,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:33,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:33,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-23 22:15:33,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556023333] [2019-11-23 22:15:33,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:15:33,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:15:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:15:33,871 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-11-23 22:15:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:33,934 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-23 22:15:33,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:15:33,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-23 22:15:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:33,936 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:15:33,936 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:15:33,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:15:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:15:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-23 22:15:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:15:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-23 22:15:33,943 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-11-23 22:15:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:33,944 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-23 22:15:33,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:15:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-23 22:15:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:15:33,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:33,945 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2019-11-23 22:15:34,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:34,146 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1382489450, now seen corresponding path program 6 times [2019-11-23 22:15:34,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:34,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68656497] [2019-11-23 22:15:34,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:34,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68656497] [2019-11-23 22:15:34,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518475810] [2019-11-23 22:15:34,223 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:34,245 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:15:34,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:34,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:15:34,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:34,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:34,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-23 22:15:34,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074888793] [2019-11-23 22:15:34,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:15:34,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:15:34,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:34,257 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2019-11-23 22:15:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:34,300 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:15:34,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:15:34,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-23 22:15:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:34,301 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:15:34,301 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:15:34,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:15:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-23 22:15:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:15:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-23 22:15:34,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2019-11-23 22:15:34,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:34,308 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-23 22:15:34,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:15:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-23 22:15:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:15:34,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:34,308 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2019-11-23 22:15:34,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:34,512 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1374234696, now seen corresponding path program 7 times [2019-11-23 22:15:34,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:34,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675885959] [2019-11-23 22:15:34,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:34,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675885959] [2019-11-23 22:15:34,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911269510] [2019-11-23 22:15:34,619 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:34,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:15:34,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:34,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:34,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-23 22:15:34,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703169537] [2019-11-23 22:15:34,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:15:34,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:15:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:34,667 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2019-11-23 22:15:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:34,717 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:15:34,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:15:34,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-23 22:15:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:34,719 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:15:34,719 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:15:34,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:15:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:15:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:15:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-23 22:15:34,732 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2019-11-23 22:15:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:34,732 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-23 22:15:34,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:15:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-23 22:15:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:15:34,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:34,733 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2019-11-23 22:15:34,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:34,936 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2031350694, now seen corresponding path program 8 times [2019-11-23 22:15:34,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:34,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028677196] [2019-11-23 22:15:34,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:35,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028677196] [2019-11-23 22:15:35,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714546636] [2019-11-23 22:15:35,150 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:35,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:35,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:35,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:15:35,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:35,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:35,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:35,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:15:35,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905711783] [2019-11-23 22:15:35,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:15:35,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:35,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:15:35,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:15:35,226 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 13 states. [2019-11-23 22:15:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:35,344 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:15:35,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:15:35,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-23 22:15:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:35,345 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:15:35,345 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:15:35,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:15:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:15:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 22:15:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:15:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-23 22:15:35,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2019-11-23 22:15:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:35,351 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-23 22:15:35,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:15:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-23 22:15:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:15:35,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:35,353 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2019-11-23 22:15:35,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:35,556 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:35,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2135335036, now seen corresponding path program 9 times [2019-11-23 22:15:35,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:35,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474054288] [2019-11-23 22:15:35,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:35,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474054288] [2019-11-23 22:15:35,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:35,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-23 22:15:35,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286968296] [2019-11-23 22:15:35,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:15:35,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:15:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:35,653 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2019-11-23 22:15:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:35,701 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:15:35,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:15:35,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-23 22:15:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:35,703 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:15:35,703 INFO L226 Difference]: Without dead ends: 0 [2019-11-23 22:15:35,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-23 22:15:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-23 22:15:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-23 22:15:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-23 22:15:35,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2019-11-23 22:15:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:35,705 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-23 22:15:35,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:15:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-23 22:15:35,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-23 22:15:35,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-23 22:15:35,807 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-23 22:15:35,807 INFO L444 ceAbstractionStarter]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2019-11-23 22:15:35,808 INFO L440 ceAbstractionStarter]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~sn~0 6) (<= 6 ULTIMATE.start_main_~sn~0) (<= 4 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 4)) (and (<= 9 ULTIMATE.start_main_~i~0) (<= 16 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~sn~0 16)) (and (<= 8 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 5) (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~sn~0 8)) (and (<= ULTIMATE.start_main_~sn~0 10) (<= ULTIMATE.start_main_~i~0 6) (<= 6 ULTIMATE.start_main_~i~0) (<= 10 ULTIMATE.start_main_~sn~0)) (and (<= ULTIMATE.start_main_~sn~0 12) (<= 7 ULTIMATE.start_main_~i~0) (<= 12 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 7)) (and (<= 2 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~sn~0 2) (<= 2 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~sn~0 0) (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 1) (<= 0 ULTIMATE.start_main_~sn~0)) (and (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 3) (<= ULTIMATE.start_main_~sn~0 4) (<= 4 ULTIMATE.start_main_~sn~0)) (and (<= 14 ULTIMATE.start_main_~sn~0) (<= ULTIMATE.start_main_~i~0 8) (<= ULTIMATE.start_main_~sn~0 14) (<= 8 ULTIMATE.start_main_~i~0))) [2019-11-23 22:15:35,808 INFO L444 ceAbstractionStarter]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2019-11-23 22:15:35,808 INFO L444 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-23 22:15:35,808 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-23 22:15:35,809 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-23 22:15:35,809 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-23 22:15:35,809 INFO L444 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-23 22:15:35,809 INFO L447 ceAbstractionStarter]: At program point L4-2(lines 1 17) the Hoare annotation is: true [2019-11-23 22:15:35,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:15:35 BoogieIcfgContainer [2019-11-23 22:15:35,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:15:35,835 INFO L168 Benchmark]: Toolchain (without parser) took 4560.04 ms. Allocated memory was 138.9 MB in the beginning and 242.7 MB in the end (delta: 103.8 MB). Free memory was 102.7 MB in the beginning and 206.1 MB in the end (delta: -103.4 MB). Peak memory consumption was 114.7 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,838 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.77 ms. Allocated memory is still 138.9 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.00 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,843 INFO L168 Benchmark]: Boogie Preprocessor took 18.32 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 179.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,847 INFO L168 Benchmark]: RCFGBuilder took 194.49 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 170.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,848 INFO L168 Benchmark]: TraceAbstraction took 3993.16 ms. Allocated memory was 201.9 MB in the beginning and 242.7 MB in the end (delta: 40.9 MB). Free memory was 169.4 MB in the beginning and 206.1 MB in the end (delta: -36.7 MB). Peak memory consumption was 118.5 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:35,855 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.77 ms. Allocated memory is still 138.9 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 100.00 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.32 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 179.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 194.49 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 170.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3993.16 ms. Allocated memory was 201.9 MB in the beginning and 242.7 MB in the end (delta: 40.9 MB). Free memory was 169.4 MB in the beginning and 206.1 MB in the end (delta: -36.7 MB). Peak memory consumption was 118.5 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: 13]: Loop Invariant Derived loop invariant: ((((((((((sn <= 6 && 6 <= sn) && 4 <= i) && i <= 4) || ((9 <= i && 16 <= sn) && sn <= 16)) || (((8 <= sn && i <= 5) && 5 <= i) && sn <= 8)) || (((sn <= 10 && i <= 6) && 6 <= i) && 10 <= sn)) || (((sn <= 12 && 7 <= i) && 12 <= sn) && i <= 7)) || (((2 <= sn && i <= 2) && sn <= 2) && 2 <= i)) || (((sn <= 0 && 1 <= i) && i <= 1) && 0 <= sn)) || (((3 <= i && i <= 3) && sn <= 4) && 4 <= sn)) || (((14 <= sn && i <= 8) && sn <= 14) && 8 <= i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Result: SAFE, OverallTime: 3.9s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 37 SDslu, 218 SDs, 0 SdLazy, 287 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=9, 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, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 12 NumberOfFragments, 116 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 252 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 12188 SizeOfPredicates, 9 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 81/489 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...