/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=LOWLEXORDER --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 18:09:55,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:09:55,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:09:55,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:09:55,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:09:55,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:09:55,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:09:55,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:09:55,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:09:55,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:09:55,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:09:55,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:09:55,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:09:55,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:09:55,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:09:55,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:09:55,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:09:55,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:09:55,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:09:55,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:09:55,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:09:55,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:09:55,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:09:55,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:09:55,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:09:55,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:09:55,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:09:55,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:09:55,723 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 18:09:55,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:09:55,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:09:55,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:09:55,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:09:55,762 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:09:55,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:09:55,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:09:55,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:09:55,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:09:55,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:09:55,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:09:55,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:09:55,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:09:55,764 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:09:55,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:09:55,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:09:55,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:09:55,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:09:55,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:09:55,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:09:55,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:09:55,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:09:55,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:09:55,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:09:55,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:09:55,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:09:55,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:09:55,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:09:55,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:09:55,768 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=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:09:56,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:09:56,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:09:56,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:09:56,131 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:09:56,132 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:09:56,133 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-21 18:09:56,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afcc96c3d/e343ed2d7add40c19332e70785d7ae32/FLAGd6c0f5b1c [2020-08-21 18:09:56,606 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:09:56,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-08-21 18:09:56,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afcc96c3d/e343ed2d7add40c19332e70785d7ae32/FLAGd6c0f5b1c [2020-08-21 18:09:57,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afcc96c3d/e343ed2d7add40c19332e70785d7ae32 [2020-08-21 18:09:57,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:09:57,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:09:57,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:57,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:09:57,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:09:57,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4e6462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57, skipping insertion in model container [2020-08-21 18:09:57,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:09:57,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:09:57,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:57,261 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:09:57,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:57,291 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:57,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57 WrapperNode [2020-08-21 18:09:57,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:57,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:57,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:57,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:57,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (1/1) ... [2020-08-21 18:09:57,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:57,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:57,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:57,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:57,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (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 18:09:57,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:57,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:57,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-08-21 18:09:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-08-21 18:09:57,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:57,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-08-21 18:09:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-08-21 18:09:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:57,669 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:57,669 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:09:57,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:57 BoogieIcfgContainer [2020-08-21 18:09:57,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:57,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:57,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:57,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:57,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:09:57" (1/3) ... [2020-08-21 18:09:57,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d06e968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:57, skipping insertion in model container [2020-08-21 18:09:57,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:57" (2/3) ... [2020-08-21 18:09:57,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d06e968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:57, skipping insertion in model container [2020-08-21 18:09:57,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:57" (3/3) ... [2020-08-21 18:09:57,682 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-08-21 18:09:57,695 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:57,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:57,717 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:57,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:57,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:57,745 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:57,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:57,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:57,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:57,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:57,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-21 18:09:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 18:09:57,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:57,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:57,779 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-08-21 18:09:57,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:57,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393184915] [2020-08-21 18:09:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:58,018 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 18:09:58,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393184915] [2020-08-21 18:09:58,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:58,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:09:58,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498022837] [2020-08-21 18:09:58,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:09:58,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:09:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:09:58,049 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-08-21 18:09:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:58,162 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-08-21 18:09:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:09:58,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-08-21 18:09:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:58,173 INFO L225 Difference]: With dead ends: 42 [2020-08-21 18:09:58,174 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 18:09:58,178 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 18:09:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 18:09:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 18:09:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 18:09:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-08-21 18:09:58,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-08-21 18:09:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:58,225 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-08-21 18:09:58,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:09:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-08-21 18:09:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 18:09:58,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:58,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:58,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:58,228 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-08-21 18:09:58,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:58,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772785357] [2020-08-21 18:09:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:58,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:58,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:09:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:58,337 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 18:09:58,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772785357] [2020-08-21 18:09:58,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:58,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:09:58,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899847789] [2020-08-21 18:09:58,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:09:58,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:09:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:09:58,342 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-08-21 18:09:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:58,418 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-08-21 18:09:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:09:58,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-08-21 18:09:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:58,420 INFO L225 Difference]: With dead ends: 30 [2020-08-21 18:09:58,420 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 18:09:58,421 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 18:09:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 18:09:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-21 18:09:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 18:09:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-08-21 18:09:58,430 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-08-21 18:09:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:58,431 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-08-21 18:09:58,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:09:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-08-21 18:09:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:09:58,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:58,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:58,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:09:58,433 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-08-21 18:09:58,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:58,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908712291] [2020-08-21 18:09:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:09:58,457 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:09:58,457 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:09:58,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:09:58,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:58 BoogieIcfgContainer [2020-08-21 18:09:58,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:09:58,481 INFO L168 Benchmark]: Toolchain (without parser) took 1428.35 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 106.5 MB in the beginning and 127.6 MB in the end (delta: -21.1 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:58,482 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 124.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-21 18:09:58,483 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.38 ms. Allocated memory is still 143.7 MB. Free memory was 106.1 MB in the beginning and 96.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:58,484 INFO L168 Benchmark]: Boogie Preprocessor took 110.98 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 96.9 MB in the beginning and 183.9 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:58,485 INFO L168 Benchmark]: RCFGBuilder took 269.15 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 171.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:58,486 INFO L168 Benchmark]: TraceAbstraction took 803.40 ms. Allocated memory is still 205.0 MB. Free memory was 171.9 MB in the beginning and 127.6 MB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:58,490 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 124.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.38 ms. Allocated memory is still 143.7 MB. Free memory was 106.1 MB in the beginning and 96.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.98 ms. Allocated memory was 143.7 MB in the beginning and 205.0 MB in the end (delta: 61.3 MB). Free memory was 96.9 MB in the beginning and 183.9 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.15 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 171.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 803.40 ms. Allocated memory is still 205.0 MB. Free memory was 171.9 MB in the beginning and 127.6 MB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 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...