/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:29:36,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:29:36,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:29:36,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:29:36,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:29:36,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:29:36,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:29:36,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:29:36,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:29:36,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:29:36,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:29:36,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:29:36,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:29:36,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:29:36,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:29:36,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:29:36,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:29:36,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:29:36,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:29:36,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:29:36,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:29:36,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:29:36,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:29:36,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:29:36,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:29:36,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:29:36,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:29:36,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:29:36,274 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 [2020-09-21 10:29:36,300 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:29:36,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:29:36,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:29:36,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:29:36,302 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:29:36,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:29:36,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:29:36,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:29:36,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:29:36,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:29:36,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:29:36,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:29:36,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:29:36,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:29:36,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:29:36,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:29:36,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:29:36,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:29:36,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:29:36,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:29:36,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:29:36,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:29:36,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:29:36,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:29:36,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:29:36,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:29:36,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:29:36,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:29:36,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:29:36,307 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 -> false [2020-09-21 10:29:36,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:29:36,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:29:36,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:29:36,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:29:36,794 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:29:36,795 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-09-21 10:29:36,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db6c404a6/b286086a791c4df6b34faa12744d19a3/FLAG6bc3a3163 [2020-09-21 10:29:37,423 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:29:37,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/id_build.i [2020-09-21 10:29:37,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db6c404a6/b286086a791c4df6b34faa12744d19a3/FLAG6bc3a3163 [2020-09-21 10:29:37,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/db6c404a6/b286086a791c4df6b34faa12744d19a3 [2020-09-21 10:29:37,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:29:37,791 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:29:37,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:37,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:29:37,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:29:37,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:37" (1/1) ... [2020-09-21 10:29:37,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4694b766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:37, skipping insertion in model container [2020-09-21 10:29:37,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:37" (1/1) ... [2020-09-21 10:29:37,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:29:37,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:29:38,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:38,084 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:29:38,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:38,130 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:29:38,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38 WrapperNode [2020-09-21 10:29:38,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:38,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:29:38,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:29:38,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:29:38,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (1/1) ... [2020-09-21 10:29:38,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:29:38,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:29:38,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:29:38,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:29:38,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (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 [2020-09-21 10:29:38,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:29:38,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:29:38,329 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:29:38,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:29:38,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:29:38,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:29:38,330 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:29:38,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:29:38,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:29:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:29:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:29:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:29:38,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:29:38,565 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:29:38,565 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:29:38,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:38 BoogieIcfgContainer [2020-09-21 10:29:38,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:29:38,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:29:38,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:29:38,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:29:38,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:29:37" (1/3) ... [2020-09-21 10:29:38,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7faa1665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:38, skipping insertion in model container [2020-09-21 10:29:38,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:38" (2/3) ... [2020-09-21 10:29:38,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7faa1665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:38, skipping insertion in model container [2020-09-21 10:29:38,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:38" (3/3) ... [2020-09-21 10:29:38,608 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-09-21 10:29:38,642 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:29:38,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:29:38,691 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:29:38,719 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:29:38,719 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:29:38,719 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:29:38,719 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:29:38,720 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:29:38,720 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:29:38,720 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:29:38,720 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:29:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-21 10:29:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 10:29:38,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:38,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:38,750 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:38,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash 292259706, now seen corresponding path program 1 times [2020-09-21 10:29:38,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:38,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139468609] [2020-09-21 10:29:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:39,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139468609] [2020-09-21 10:29:39,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:39,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:29:39,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916186863] [2020-09-21 10:29:39,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:29:39,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:39,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:29:39,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:29:39,041 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-09-21 10:29:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:39,149 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-09-21 10:29:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:29:39,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-21 10:29:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:39,161 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:29:39,162 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:29:39,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:29:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 10:29:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:29:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 10:29:39,210 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2020-09-21 10:29:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:39,211 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 10:29:39,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:29:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 10:29:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:29:39,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:39,212 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:39,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:29:39,213 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:39,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1546928273, now seen corresponding path program 1 times [2020-09-21 10:29:39,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:39,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152794099] [2020-09-21 10:29:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:29:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:39,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152794099] [2020-09-21 10:29:39,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:39,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:29:39,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224451229] [2020-09-21 10:29:39,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:29:39,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:29:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:29:39,311 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-21 10:29:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:39,360 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-09-21 10:29:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:29:39,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 10:29:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:39,361 INFO L225 Difference]: With dead ends: 21 [2020-09-21 10:29:39,362 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:29:39,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:29:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:29:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:29:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:29:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:29:39,364 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-09-21 10:29:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:39,365 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:29:39,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:29:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:29:39,366 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:29:39,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:29:39,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:29:39,422 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:29:39,422 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:29:39,422 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:29:39,422 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:29:39,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:29:39,423 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:29:39,423 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:29:39,423 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 10:29:39,423 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:29:39,424 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:29:39,424 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-09-21 10:29:39,424 INFO L268 CegarLoopResult]: For program point L19(lines 17 20) no Hoare annotation was computed. [2020-09-21 10:29:39,424 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~nlen~0) (<= 0 main_~i~0)) [2020-09-21 10:29:39,425 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-09-21 10:29:39,425 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-09-21 10:29:39,425 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~nlen~0) (<= 0 main_~i~0)) [2020-09-21 10:29:39,426 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (<= (+ main_~i~0 1) main_~nlen~0) (<= 0 main_~i~0)) [2020-09-21 10:29:39,426 INFO L268 CegarLoopResult]: For program point L16-2(lines 16 21) no Hoare annotation was computed. [2020-09-21 10:29:39,426 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (<= 0 main_~i~0) [2020-09-21 10:29:39,426 INFO L268 CegarLoopResult]: For program point L16-4(lines 16 21) no Hoare annotation was computed. [2020-09-21 10:29:39,426 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 10:29:39,427 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 10:29:39,427 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 10:29:39,427 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 10:29:39,427 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 10:29:39,428 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 10:29:39,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:29:39 BoogieIcfgContainer [2020-09-21 10:29:39,451 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:29:39,455 INFO L168 Benchmark]: Toolchain (without parser) took 1669.03 ms. Allocated memory was 107.0 MB in the beginning and 153.1 MB in the end (delta: 46.1 MB). Free memory was 73.0 MB in the beginning and 83.6 MB in the end (delta: -10.6 MB). Peak memory consumption was 35.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:39,456 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory was 90.3 MB in the beginning and 90.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:29:39,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.25 ms. Allocated memory is still 107.0 MB. Free memory was 72.4 MB in the beginning and 63.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:39,458 INFO L168 Benchmark]: Boogie Preprocessor took 118.71 ms. Allocated memory was 107.0 MB in the beginning and 153.1 MB in the end (delta: 46.1 MB). Free memory was 63.0 MB in the beginning and 139.4 MB in the end (delta: -76.4 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:39,459 INFO L168 Benchmark]: RCFGBuilder took 326.08 ms. Allocated memory is still 153.1 MB. Free memory was 138.8 MB in the beginning and 126.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:39,460 INFO L168 Benchmark]: TraceAbstraction took 873.05 ms. Allocated memory is still 153.1 MB. Free memory was 125.9 MB in the beginning and 83.6 MB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:39,465 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 107.0 MB. Free memory was 90.3 MB in the beginning and 90.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.25 ms. Allocated memory is still 107.0 MB. Free memory was 72.4 MB in the beginning and 63.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.71 ms. Allocated memory was 107.0 MB in the beginning and 153.1 MB in the end (delta: 46.1 MB). Free memory was 63.0 MB in the beginning and 139.4 MB in the end (delta: -76.4 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.08 ms. Allocated memory is still 153.1 MB. Free memory was 138.8 MB in the beginning and 126.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 873.05 ms. Allocated memory is still 153.1 MB. Free memory was 125.9 MB in the beginning and 83.6 MB in the end (delta: 42.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 <= i - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: i + 1 <= nlen && 0 <= i - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 14 SDslu, 82 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 12 PreInvPairs, 16 NumberOfFragments, 35 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 675 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...