/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=HIGHLEXORDER -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 0.1.25-5644d1e-m [2020-08-18 19:31:07,178 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 19:31:07,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:31:07,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:31:07,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:31:07,301 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 19:31:07,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:31:07,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:31:07,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:31:07,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:31:07,346 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:31:07,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:31:07,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:31:07,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:31:07,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:31:07,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:31:07,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:31:07,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:31:07,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:31:07,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:31:07,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:31:07,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:31:07,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:31:07,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:31:07,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:31:07,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:31:07,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:31:07,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:31:07,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:31:07,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:31:07,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:31:07,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:31:07,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:31:07,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:31:07,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:31:07,352 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:31:07,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:31:07,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:31:07,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:31:07,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:31:07,664 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:31:07,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-18 19:31:07,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/363ffa788/fce329c05b8d401ebeba0fe0536e13db/FLAGc97c42924 [2020-08-18 19:31:08,162 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:31:08,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-18 19:31:08,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/363ffa788/fce329c05b8d401ebeba0fe0536e13db/FLAGc97c42924 [2020-08-18 19:31:08,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/363ffa788/fce329c05b8d401ebeba0fe0536e13db [2020-08-18 19:31:08,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:31:08,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:31:08,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:31:08,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:31:08,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:31:08,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1392f113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08, skipping insertion in model container [2020-08-18 19:31:08,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:31:08,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:31:08,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:31:08,779 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:31:08,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:31:08,804 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:31:08,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08 WrapperNode [2020-08-18 19:31:08,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:31:08,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:31:08,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:31:08,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:31:08,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (1/1) ... [2020-08-18 19:31:08,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:31:08,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:31:08,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:31:08,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:31:08,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (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 19:31:08,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:31:08,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:31:08,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-18 19:31:08,972 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-08-18 19:31:08,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:31:08,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:31:08,972 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-18 19:31:08,973 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-08-18 19:31:08,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:31:08,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:31:08,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:31:09,136 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:31:09,137 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 19:31:09,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:31:09 BoogieIcfgContainer [2020-08-18 19:31:09,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:31:09,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:31:09,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:31:09,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:31:09,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:31:08" (1/3) ... [2020-08-18 19:31:09,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d01108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:31:09, skipping insertion in model container [2020-08-18 19:31:09,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:31:08" (2/3) ... [2020-08-18 19:31:09,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d01108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:31:09, skipping insertion in model container [2020-08-18 19:31:09,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:31:09" (3/3) ... [2020-08-18 19:31:09,148 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-08-18 19:31:09,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:31:09,166 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:31:09,179 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:31:09,203 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:31:09,203 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:31:09,204 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:31:09,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:31:09,204 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:31:09,204 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:31:09,204 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:31:09,204 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:31:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-18 19:31:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 19:31:09,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:09,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:09,229 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-08-18 19:31:09,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:09,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451245566] [2020-08-18 19:31:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:09,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:09,430 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 19:31:09,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451245566] [2020-08-18 19:31:09,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:31:09,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 19:31:09,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584187290] [2020-08-18 19:31:09,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 19:31:09,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 19:31:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 19:31:09,469 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-18 19:31:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:09,601 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-08-18 19:31:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 19:31:09,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-18 19:31:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:09,611 INFO L225 Difference]: With dead ends: 42 [2020-08-18 19:31:09,611 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 19:31:09,614 INFO L675 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 [2020-08-18 19:31:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 19:31:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-18 19:31:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-18 19:31:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-18 19:31:09,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-08-18 19:31:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:09,649 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-18 19:31:09,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 19:31:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-18 19:31:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 19:31:09,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:09,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:09,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:31:09,652 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-08-18 19:31:09,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:09,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273159929] [2020-08-18 19:31:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:09,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:31:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:09,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:31:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:31:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:31:09,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273159929] [2020-08-18 19:31:09,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 19:31:09,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 19:31:09,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076819202] [2020-08-18 19:31:09,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 19:31:09,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:31:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 19:31:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 19:31:09,770 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-08-18 19:31:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:31:09,842 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-18 19:31:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 19:31:09,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-18 19:31:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:31:09,845 INFO L225 Difference]: With dead ends: 30 [2020-08-18 19:31:09,845 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 19:31:09,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:31:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 19:31:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-18 19:31:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 19:31:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-08-18 19:31:09,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-08-18 19:31:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:31:09,855 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-08-18 19:31:09,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 19:31:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-08-18 19:31:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 19:31:09,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:31:09,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:31:09,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:31:09,857 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:31:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:31:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-08-18 19:31:09,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:31:09,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433317849] [2020-08-18 19:31:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:31:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:31:09,876 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:31:09,876 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:31:09,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:31:09,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:31:09 BoogieIcfgContainer [2020-08-18 19:31:09,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:31:09,899 INFO L168 Benchmark]: Toolchain (without parser) took 1306.18 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 125.4 MB in the end (delta: -21.7 MB). Peak memory consumption was 40.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:09,900 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 19:31:09,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.22 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:09,902 INFO L168 Benchmark]: Boogie Preprocessor took 102.10 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:09,903 INFO L168 Benchmark]: RCFGBuilder took 233.22 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:09,904 INFO L168 Benchmark]: TraceAbstraction took 754.45 ms. Allocated memory is still 202.4 MB. Free memory was 169.0 MB in the beginning and 125.4 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:31:09,908 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 212.22 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.10 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.4 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 233.22 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 754.45 ms. Allocated memory is still 202.4 MB. Free memory was 169.0 MB in the beginning and 125.4 MB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 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; [L24] COND TRUE i<5 [L25] i++ [L29] CALL check_error(i!=3) [L18] (b) ? (0) : __blast_assert () [L29] RET check_error(i!=3) [L24] COND TRUE i<5 [L25] i++ [L29] CALL check_error(i!=3) [L18] (b) ? (0) : __blast_assert () [L29] RET check_error(i!=3) [L24] COND TRUE i<5 [L25] i++ [L29] CALL check_error(i!=3) [L18] (b) ? (0) : __blast_assert () [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 108 SDs, 0 SdLazy, 48 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 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, 0.1s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 680 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...