/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:07:48,574 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 21:07:48,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:07:48,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:07:48,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:07:48,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:07:48,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:07:48,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:07:48,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:07:48,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:07:48,662 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:07:48,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:07:48,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:07:48,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:07:48,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:07:48,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:07:48,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:07:48,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:07:48,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:07:48,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:07:48,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:07:48,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:07:48,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:07:48,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:07:48,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:07:48,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:07:48,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:07:48,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:48,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:07:48,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:07:48,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:07:48,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:07:48,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:07:48,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:07:48,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:07:48,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:07:48,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:07:49,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:07:49,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:07:49,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:07:49,015 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:07:49,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-08-18 21:07:49,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdf071686/c17932f7710c406599188a2664c3bf9f/FLAGfff2707d1 [2020-08-18 21:07:49,527 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:49,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-08-18 21:07:49,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdf071686/c17932f7710c406599188a2664c3bf9f/FLAGfff2707d1 [2020-08-18 21:07:49,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdf071686/c17932f7710c406599188a2664c3bf9f [2020-08-18 21:07:49,953 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:49,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:49,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:49,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:49,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:49,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:49" (1/1) ... [2020-08-18 21:07:49,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ecced43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:49, skipping insertion in model container [2020-08-18 21:07:49,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:49" (1/1) ... [2020-08-18 21:07:49,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:50,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:50,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:50,198 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:50,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:50,230 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:50,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50 WrapperNode [2020-08-18 21:07:50,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:50,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:50,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:50,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:50,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... [2020-08-18 21:07:50,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:50,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:50,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:50,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:50,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 21:07:50,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:50,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:50,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-18 21:07:50,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:50,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:50,405 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-18 21:07:50,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:50,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:50,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:50,559 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:50,559 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:07:50,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:50 BoogieIcfgContainer [2020-08-18 21:07:50,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:50,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:50,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:50,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:50,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:49" (1/3) ... [2020-08-18 21:07:50,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dadd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:50, skipping insertion in model container [2020-08-18 21:07:50,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:50" (2/3) ... [2020-08-18 21:07:50,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dadd83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:50, skipping insertion in model container [2020-08-18 21:07:50,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:50" (3/3) ... [2020-08-18 21:07:50,571 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2020-08-18 21:07:50,582 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:50,589 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:50,603 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:50,627 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:50,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:50,628 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:50,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:50,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:50,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:50,628 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:50,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-08-18 21:07:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-08-18 21:07:50,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:50,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:50,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash 676687463, now seen corresponding path program 1 times [2020-08-18 21:07:50,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:50,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886086385] [2020-08-18 21:07:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:50,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:50,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886086385] [2020-08-18 21:07:50,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:50,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:07:50,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12239054] [2020-08-18 21:07:50,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:07:50,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:50,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:07:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:50,865 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-08-18 21:07:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:50,930 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-08-18 21:07:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:07:50,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-08-18 21:07:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:50,944 INFO L225 Difference]: With dead ends: 30 [2020-08-18 21:07:50,944 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 21:07:50,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:07:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 21:07:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-08-18 21:07:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-18 21:07:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-08-18 21:07:51,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-08-18 21:07:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:51,009 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-08-18 21:07:51,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:07:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-08-18 21:07:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 21:07:51,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:51,010 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:51,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:51,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1754257002, now seen corresponding path program 1 times [2020-08-18 21:07:51,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:51,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505982195] [2020-08-18 21:07:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:51,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:51,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505982195] [2020-08-18 21:07:51,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:07:51,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:07:51,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339680985] [2020-08-18 21:07:51,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:07:51,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:07:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:51,130 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-08-18 21:07:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:51,162 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-18 21:07:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:07:51,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 21:07:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:51,164 INFO L225 Difference]: With dead ends: 18 [2020-08-18 21:07:51,164 INFO L226 Difference]: Without dead ends: 15 [2020-08-18 21:07:51,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:07:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-18 21:07:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-08-18 21:07:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 21:07:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-18 21:07:51,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-08-18 21:07:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:51,171 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-18 21:07:51,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:07:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-18 21:07:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 21:07:51,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:51,172 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:51,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:51,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2083501651, now seen corresponding path program 2 times [2020-08-18 21:07:51,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:51,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112474305] [2020-08-18 21:07:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:07:51,187 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:07:51,187 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:07:51,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:51,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:51 BoogieIcfgContainer [2020-08-18 21:07:51,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:51,208 INFO L168 Benchmark]: Toolchain (without parser) took 1251.72 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 102.8 MB in the beginning and 135.8 MB in the end (delta: -33.0 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:51,210 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:07:51,211 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.39 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:51,213 INFO L168 Benchmark]: Boogie Preprocessor took 105.40 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 93.4 MB in the beginning and 179.9 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:51,214 INFO L168 Benchmark]: RCFGBuilder took 225.27 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 168.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:51,215 INFO L168 Benchmark]: TraceAbstraction took 640.78 ms. Allocated memory is still 200.8 MB. Free memory was 167.4 MB in the beginning and 135.8 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:51,219 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.39 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.40 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 93.4 MB in the beginning and 179.9 MB in the end (delta: -86.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 225.27 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 168.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 640.78 ms. Allocated memory is still 200.8 MB. Free memory was 167.4 MB in the beginning and 135.8 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 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: [L12] int i=0; [L13] COND TRUE i<5 [L14] i++ [L16] (i!=3) ? (0) : __blast_assert () [L13] COND TRUE i<5 [L14] i++ [L16] (i!=3) ? (0) : __blast_assert () [L13] COND TRUE i<5 [L14] i++ [L16] (i!=3) ? (0) : __blast_assert () [L16] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 38 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 276 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...