/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:11:05,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:11:05,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:11:05,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 21:11:05,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:11:05,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:11:05,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:11:05,913 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:11:05,933 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:11:05,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:11:05,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:11:05,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:11:05,937 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:11:05,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:11:05,938 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:11:05,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:11:05,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:11:05,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:11:05,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:11:05,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:11:05,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:11:05,939 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:11:05,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:11:05,939 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:11:05,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:11:05,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:11:05,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:11:05,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:11:05,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:11:05,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:11:05,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:11:05,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:11:05,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:11:05,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:11:05,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:11:05,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:11:05,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:11:06,209 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:11:06,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:11:06,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:11:06,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:11:06,232 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:11:06,233 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-11-06 21:11:06,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804f8fe82/5da1fa03b8704a01ac6b9561b66114b6/FLAG01a9ef997 [2019-11-06 21:11:06,760 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:11:06,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-11-06 21:11:06,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804f8fe82/5da1fa03b8704a01ac6b9561b66114b6/FLAG01a9ef997 [2019-11-06 21:11:07,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/804f8fe82/5da1fa03b8704a01ac6b9561b66114b6 [2019-11-06 21:11:07,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:11:07,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:11:07,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:11:07,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:11:07,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:11:07,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa75c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07, skipping insertion in model container [2019-11-06 21:11:07,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,171 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:11:07,187 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:11:07,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:11:07,350 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:11:07,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:11:07,379 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:11:07,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07 WrapperNode [2019-11-06 21:11:07,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:11:07,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:11:07,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:11:07,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:11:07,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... [2019-11-06 21:11:07,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:11:07,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:11:07,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:11:07,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:11:07,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:11:07,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:11:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:11:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-11-06 21:11:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-11-06 21:11:07,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:11:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:11:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-11-06 21:11:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-11-06 21:11:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:11:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:11:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:11:07,694 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:11:07,695 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:11:07,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:11:07 BoogieIcfgContainer [2019-11-06 21:11:07,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:11:07,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:11:07,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:11:07,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:11:07,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:11:07" (1/3) ... [2019-11-06 21:11:07,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:11:07, skipping insertion in model container [2019-11-06 21:11:07,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:11:07" (2/3) ... [2019-11-06 21:11:07,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:11:07, skipping insertion in model container [2019-11-06 21:11:07,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:11:07" (3/3) ... [2019-11-06 21:11:07,707 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-11-06 21:11:07,717 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:11:07,724 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:11:07,735 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:11:07,760 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:11:07,760 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:11:07,760 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:11:07,761 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:11:07,761 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:11:07,761 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:11:07,761 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:11:07,761 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:11:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-06 21:11:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-06 21:11:07,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:11:07,788 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:11:07,789 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:11:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:11:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-11-06 21:11:07,801 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:11:07,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370680685] [2019-11-06 21:11:07,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:11:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:11:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:11:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:11:07,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370680685] [2019-11-06 21:11:07,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:11:07,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:11:07,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392797580] [2019-11-06 21:11:07,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:11:07,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:11:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:11:08,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:11:08,011 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-11-06 21:11:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:11:08,128 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-11-06 21:11:08,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:11:08,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-06 21:11:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:11:08,139 INFO L225 Difference]: With dead ends: 42 [2019-11-06 21:11:08,139 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 21:11:08,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:11:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 21:11:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-06 21:11:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:11:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-06 21:11:08,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-11-06 21:11:08,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:11:08,197 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-06 21:11:08,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:11:08,197 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-06 21:11:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 21:11:08,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:11:08,199 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:11:08,199 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:11:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:11:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-11-06 21:11:08,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:11:08,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105222020] [2019-11-06 21:11:08,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:11:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:11:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:11:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:11:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:11:08,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105222020] [2019-11-06 21:11:08,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506436950] [2019-11-06 21:11:08,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:11:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:11:08,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:11:08,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:11:08,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:11:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:11:08,451 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:11:08,451 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-06 21:11:08,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659350893] [2019-11-06 21:11:08,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:11:08,455 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:11:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:11:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:11:08,456 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2019-11-06 21:11:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:11:08,537 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-06 21:11:08,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:11:08,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-06 21:11:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:11:08,539 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:11:08,539 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 21:11:08,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:11:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 21:11:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-06 21:11:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 21:11:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-06 21:11:08,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-11-06 21:11:08,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:11:08,549 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-06 21:11:08,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:11:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-06 21:11:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 21:11:08,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:11:08,551 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:11:08,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:11:08,755 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:11:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:11:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-11-06 21:11:08,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:11:08,757 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234471345] [2019-11-06 21:11:08,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:11:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 21:11:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-06 21:11:08,831 INFO L172 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-06 21:11:08,832 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-06 21:11:08,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:11:08 BoogieIcfgContainer [2019-11-06 21:11:08,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-06 21:11:08,854 INFO L168 Benchmark]: Toolchain (without parser) took 1698.90 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 104.7 MB in the beginning and 118.0 MB in the end (delta: -13.3 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2019-11-06 21:11:08,855 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 21:11:08,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.65 ms. Allocated memory is still 139.5 MB. Free memory was 104.5 MB in the beginning and 95.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:11:08,857 INFO L168 Benchmark]: Boogie Preprocessor took 112.98 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 95.4 MB in the beginning and 182.3 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-11-06 21:11:08,858 INFO L168 Benchmark]: RCFGBuilder took 202.51 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 171.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-11-06 21:11:08,859 INFO L168 Benchmark]: TraceAbstraction took 1152.79 ms. Allocated memory is still 203.4 MB. Free memory was 171.4 MB in the beginning and 118.0 MB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2019-11-06 21:11:08,864 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.65 ms. Allocated memory is still 139.5 MB. Free memory was 104.5 MB in the beginning and 95.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.98 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 95.4 MB in the beginning and 182.3 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 202.51 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 171.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1152.79 ms. Allocated memory is still 203.4 MB. Free memory was 171.4 MB in the beginning and 118.0 MB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 129 SDs, 0 SdLazy, 59 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1128 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...