/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 20:35:03,987 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 20:35:04,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:35:04,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:35:04,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:35:04,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:35:04,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:35:04,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:35:04,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:35:04,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:35:04,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:35:04,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:35:04,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:35:04,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:35:04,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:35:04,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:35:04,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:35:04,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:35:04,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:35:04,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:35:04,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:35:04,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:35:04,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 20:35:04,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:35:04,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:35:04,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:35:04,119 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 [2020-08-21 20:35:04,166 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:35:04,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:35:04,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:35:04,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:35:04,169 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:35:04,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:35:04,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:35:04,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:35:04,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:35:04,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:35:04,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:35:04,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:35:04,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:35:04,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:35:04,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:35:04,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:35:04,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:35:04,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:35:04,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:35:04,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:35:04,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:35:04,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:35:04,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:35:04,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:35:04,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:35:04,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:35:04,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:35:04,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:35:04,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:35:04,176 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=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:35:04,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:35:04,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:35:04,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:35:04,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:35:04,563 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:35:04,564 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-21 20:35:04,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3e98c379/b4bbfe22a57c4db18f3bc0161c0c4bb7/FLAG763f8bda5 [2020-08-21 20:35:05,133 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:35:05,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-21 20:35:05,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3e98c379/b4bbfe22a57c4db18f3bc0161c0c4bb7/FLAG763f8bda5 [2020-08-21 20:35:05,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3e98c379/b4bbfe22a57c4db18f3bc0161c0c4bb7 [2020-08-21 20:35:05,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:35:05,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:35:05,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:35:05,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:35:05,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:35:05,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c294ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05, skipping insertion in model container [2020-08-21 20:35:05,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:35:05,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:35:05,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:35:05,812 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:35:05,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:35:05,850 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:35:05,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05 WrapperNode [2020-08-21 20:35:05,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:35:05,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:35:05,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:35:05,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:35:05,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (1/1) ... [2020-08-21 20:35:05,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:35:05,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:35:05,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:35:05,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:35:05,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (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 [2020-08-21 20:35:06,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:35:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:35:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 20:35:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-08-21 20:35:06,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:35:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:35:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 20:35:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-08-21 20:35:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:35:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:35:06,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:35:06,246 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:35:06,246 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 20:35:06,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:35:06 BoogieIcfgContainer [2020-08-21 20:35:06,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:35:06,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:35:06,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:35:06,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:35:06,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:35:05" (1/3) ... [2020-08-21 20:35:06,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6960ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:35:06, skipping insertion in model container [2020-08-21 20:35:06,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:35:05" (2/3) ... [2020-08-21 20:35:06,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6960ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:35:06, skipping insertion in model container [2020-08-21 20:35:06,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:35:06" (3/3) ... [2020-08-21 20:35:06,260 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-08-21 20:35:06,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:35:06,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:35:06,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:35:06,317 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:35:06,317 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:35:06,318 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:35:06,318 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:35:06,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:35:06,318 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:35:06,318 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:35:06,319 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:35:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-21 20:35:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 20:35:06,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:06,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:06,346 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:06,352 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-08-21 20:35:06,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:06,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707335143] [2020-08-21 20:35:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:06,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:35:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:35:06,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707335143] [2020-08-21 20:35:06,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:35:06,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:35:06,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666997926] [2020-08-21 20:35:06,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:35:06,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:35:06,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:35:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:35:06,629 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-21 20:35:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:35:06,778 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-08-21 20:35:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 20:35:06,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-21 20:35:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:35:06,789 INFO L225 Difference]: With dead ends: 42 [2020-08-21 20:35:06,789 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 20:35:06,793 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 [2020-08-21 20:35:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 20:35:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 20:35:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 20:35:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-21 20:35:06,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-08-21 20:35:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:35:06,836 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-21 20:35:06,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:35:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-21 20:35:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 20:35:06,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:06,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:06,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:35:06,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-08-21 20:35:06,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:06,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043938879] [2020-08-21 20:35:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:06,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:35:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:06,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:35:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:35:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:35:06,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043938879] [2020-08-21 20:35:06,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:35:06,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 20:35:06,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88129600] [2020-08-21 20:35:06,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:35:06,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:35:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:35:06,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:35:06,941 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-08-21 20:35:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:35:07,003 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-21 20:35:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 20:35:07,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-21 20:35:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:35:07,005 INFO L225 Difference]: With dead ends: 30 [2020-08-21 20:35:07,005 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 20:35:07,006 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 [2020-08-21 20:35:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 20:35:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-21 20:35:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 20:35:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-08-21 20:35:07,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-08-21 20:35:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:35:07,015 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-08-21 20:35:07,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:35:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-08-21 20:35:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 20:35:07,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:35:07,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:35:07,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:35:07,017 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:35:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:35:07,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-08-21 20:35:07,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:35:07,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383267783] [2020-08-21 20:35:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:35:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 20:35:07,039 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 20:35:07,039 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 20:35:07,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:35:07,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 08:35:07 BoogieIcfgContainer [2020-08-21 20:35:07,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 20:35:07,067 INFO L168 Benchmark]: Toolchain (without parser) took 1485.78 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.9 MB in the beginning and 123.2 MB in the end (delta: -21.4 MB). Peak memory consumption was 41.0 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:07,068 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 20:35:07,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.22 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:07,070 INFO L168 Benchmark]: Boogie Preprocessor took 128.50 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 179.2 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:07,071 INFO L168 Benchmark]: RCFGBuilder took 269.78 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 167.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:07,072 INFO L168 Benchmark]: TraceAbstraction took 812.29 ms. Allocated memory is still 200.8 MB. Free memory was 166.7 MB in the beginning and 123.2 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. [2020-08-21 20:35:07,077 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.22 ms. Allocated memory is still 138.4 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.50 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 179.2 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.78 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 167.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 812.29 ms. Allocated memory is still 200.8 MB. Free memory was 166.7 MB in the beginning and 123.2 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 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; [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: 0.7s, 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, 0.2s 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...