/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/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:08:42,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:08:42,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:08:42,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:08:42,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:08:42,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:08:42,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:08:42,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:08:42,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:08:42,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:08:42,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:08:42,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-23 22:08:42,894 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 22:08:42,908 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:08:42,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:08:42,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:08:42,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:08:42,910 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:08:42,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:08:42,910 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:08:42,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:08:42,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:08:42,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:08:42,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:08:42,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:08:42,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:08:42,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:08:42,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:08:42,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:08:42,912 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:08:42,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:08:42,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:08:42,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:08:42,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:08:42,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:08:42,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:08:42,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:08:42,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:08:42,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:08:42,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:08:42,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:08:42,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:08:42,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:08:43,192 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:08:43,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:08:43,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:08:43,209 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:08:43,210 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:08:43,211 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-11-23 22:08:43,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dddd86f19/6984ef24afd64c44b9bf64697ca2c555/FLAGbece8e81e [2019-11-23 22:08:43,713 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:08:43,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-11-23 22:08:43,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dddd86f19/6984ef24afd64c44b9bf64697ca2c555/FLAGbece8e81e [2019-11-23 22:08:44,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dddd86f19/6984ef24afd64c44b9bf64697ca2c555 [2019-11-23 22:08:44,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:08:44,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:08:44,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:44,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:08:44,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:08:44,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66da9fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44, skipping insertion in model container [2019-11-23 22:08:44,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:08:44,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:08:44,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:44,405 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:08:44,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:08:44,434 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:08:44,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44 WrapperNode [2019-11-23 22:08:44,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:08:44,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:44,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:08:44,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:08:44,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:08:44,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:08:44,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:08:44,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:08:44,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (1/1) ... [2019-11-23 22:08:44,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:08:44,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:08:44,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:08:44,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:08:44,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (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 22:08:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:08:44,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:08:44,782 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:08:44,783 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:08:44,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:44 BoogieIcfgContainer [2019-11-23 22:08:44,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:08:44,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:08:44,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:08:44,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:08:44,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:08:44" (1/3) ... [2019-11-23 22:08:44,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3710557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:44, skipping insertion in model container [2019-11-23 22:08:44,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:08:44" (2/3) ... [2019-11-23 22:08:44,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3710557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:08:44, skipping insertion in model container [2019-11-23 22:08:44,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:08:44" (3/3) ... [2019-11-23 22:08:44,793 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-11-23 22:08:44,802 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:08:44,809 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:08:44,820 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:08:44,844 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:08:44,845 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:08:44,845 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:08:44,845 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:08:44,845 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:08:44,845 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:08:44,846 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:08:44,846 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:08:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 22:08:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:08:44,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:44,866 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:08:44,867 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-11-23 22:08:44,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:44,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221510304] [2019-11-23 22:08:44,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:45,053 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 22:08:45,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221510304] [2019-11-23 22:08:45,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:08:45,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:08:45,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332976702] [2019-11-23 22:08:45,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:08:45,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:45,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:08:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:08:45,088 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 22:08:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:45,122 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-11-23 22:08:45,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:08:45,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 22:08:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:45,136 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:08:45,136 INFO L226 Difference]: Without dead ends: 7 [2019-11-23 22:08:45,139 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 22:08:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-23 22:08:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-23 22:08:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-23 22:08:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-23 22:08:45,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-23 22:08:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:45,176 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-23 22:08:45,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:08:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-23 22:08:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:08:45,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:45,178 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:08:45,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-11-23 22:08:45,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:45,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221907098] [2019-11-23 22:08:45,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:45,271 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 22:08:45,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221907098] [2019-11-23 22:08:45,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918913457] [2019-11-23 22:08:45,273 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 22:08:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:45,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:08:45,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:45,361 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 22:08:45,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:45,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-11-23 22:08:45,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857543333] [2019-11-23 22:08:45,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:08:45,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:45,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:08:45,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:08:45,366 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-11-23 22:08:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:45,385 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-23 22:08:45,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:08:45,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-23 22:08:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:45,387 INFO L225 Difference]: With dead ends: 12 [2019-11-23 22:08:45,387 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 22:08:45,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:08:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 22:08:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 22:08:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:08:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-23 22:08:45,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-23 22:08:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:45,392 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-23 22:08:45,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:08:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-23 22:08:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:08:45,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:45,393 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-23 22:08:45,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:45,597 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:45,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-11-23 22:08:45,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:45,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019529145] [2019-11-23 22:08:45,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:45,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019529145] [2019-11-23 22:08:45,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112889657] [2019-11-23 22:08:45,728 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 22:08:45,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:08:45,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:45,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:08:45,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:45,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:45,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:08:45,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555640376] [2019-11-23 22:08:45,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:08:45,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:08:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:08:45,800 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-11-23 22:08:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:45,826 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-23 22:08:45,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:08:45,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-11-23 22:08:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:45,828 INFO L225 Difference]: With dead ends: 13 [2019-11-23 22:08:45,828 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 22:08:45,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:08:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 22:08:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 22:08:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:08:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:08:45,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-23 22:08:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:45,832 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:08:45,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:08:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:08:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:08:45,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:45,833 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-11-23 22:08:46,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:46,037 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-11-23 22:08:46,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:46,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122971412] [2019-11-23 22:08:46,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:46,163 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 22:08:46,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122971412] [2019-11-23 22:08:46,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261649737] [2019-11-23 22:08:46,164 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 22:08:46,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:08:46,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:46,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:08:46,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:46,213 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 22:08:46,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:46,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:08:46,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543227035] [2019-11-23 22:08:46,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:08:46,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:46,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:08:46,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:46,215 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2019-11-23 22:08:46,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:46,263 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-23 22:08:46,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:08:46,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-11-23 22:08:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:46,265 INFO L225 Difference]: With dead ends: 14 [2019-11-23 22:08:46,266 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:08:46,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:08:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:08:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:08:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:08:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-23 22:08:46,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-11-23 22:08:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:46,275 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-23 22:08:46,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:08:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-23 22:08:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:08:46,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:46,276 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2019-11-23 22:08:46,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:46,481 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:46,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1174852536, now seen corresponding path program 4 times [2019-11-23 22:08:46,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:46,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654405720] [2019-11-23 22:08:46,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:46,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654405720] [2019-11-23 22:08:46,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239825199] [2019-11-23 22:08:46,616 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:46,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:08:46,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:46,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:08:46,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:08:46,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:46,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 22:08:46,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43927998] [2019-11-23 22:08:46,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:08:46,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:08:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:46,702 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2019-11-23 22:08:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:46,749 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-23 22:08:46,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:08:46,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-11-23 22:08:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:46,750 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:08:46,750 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:08:46,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:08:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:08:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:08:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:08:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:08:46,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-11-23 22:08:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:46,755 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:08:46,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:08:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:08:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:08:46,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:46,756 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2019-11-23 22:08:46,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:46,960 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2059024878, now seen corresponding path program 5 times [2019-11-23 22:08:46,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:46,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984159046] [2019-11-23 22:08:46,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:08:47,079 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 22:08:47,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984159046] [2019-11-23 22:08:47,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744337535] [2019-11-23 22:08:47,080 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 22:08:47,109 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:08:47,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:08:47,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:08:47,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:08:47,137 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 22:08:47,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:08:47,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:08:47,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868210573] [2019-11-23 22:08:47,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:08:47,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:08:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:08:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:47,139 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2019-11-23 22:08:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:08:47,187 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:08:47,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:08:47,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-11-23 22:08:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:08:47,188 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:08:47,189 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:08:47,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:08:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:08:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:08:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:08:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-23 22:08:47,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-23 22:08:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:08:47,196 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-23 22:08:47,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:08:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-23 22:08:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:08:47,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:08:47,197 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2019-11-23 22:08:47,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:08:47,405 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:08:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:08:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 596403592, now seen corresponding path program 6 times [2019-11-23 22:08:47,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:08:47,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36499811] [2019-11-23 22:08:47,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:08:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:08:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:08:47,469 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 22:08:47,469 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 22:08:47,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:08:47 BoogieIcfgContainer [2019-11-23 22:08:47,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:08:47,502 INFO L168 Benchmark]: Toolchain (without parser) took 3360.23 ms. Allocated memory was 144.2 MB in the beginning and 232.3 MB in the end (delta: 88.1 MB). Free memory was 102.4 MB in the beginning and 159.9 MB in the end (delta: -57.6 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,504 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.06 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,506 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.14 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 92.7 MB in the beginning and 179.0 MB in the end (delta: -86.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,507 INFO L168 Benchmark]: Boogie Preprocessor took 19.15 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 177.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,510 INFO L168 Benchmark]: RCFGBuilder took 219.15 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 168.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,511 INFO L168 Benchmark]: TraceAbstraction took 2707.70 ms. Allocated memory was 200.3 MB in the beginning and 232.3 MB in the end (delta: 32.0 MB). Free memory was 167.5 MB in the beginning and 159.9 MB in the end (delta: 7.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. [2019-11-23 22:08:47,523 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.06 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 110.14 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 92.7 MB in the beginning and 179.0 MB in the end (delta: -86.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.15 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 177.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 219.15 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 168.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2707.70 ms. Allocated memory was 200.3 MB in the beginning and 232.3 MB in the end (delta: 32.0 MB). Free memory was 167.5 MB in the beginning and 159.9 MB in the end (delta: 7.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.6s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 69 SDs, 0 SdLazy, 135 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2490 SizeOfPredicates, 5 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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 incorrect! Received shutdown request...