/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:02:51,418 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 22:02:51,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:02:51,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:02:51,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:02:51,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:02:51,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:02:51,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:02:51,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:02:51,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:02:51,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:02:51,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:02:51,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:02:51,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:02:51,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:02:51,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:02:51,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:02:51,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:02:51,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:02:51,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:02:51,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:02:51,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:02:51,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:02:51,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:02:51,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:02:51,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:02:51,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:02:51,566 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:02:51,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:02:51,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:02:51,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:02:51,569 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:02:51,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:02:51,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:02:51,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:02:51,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:02:51,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:02:51,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:02:51,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:02:51,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:02:51,572 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:02:51,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:02:51,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:02:51,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:02:51,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:02:51,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:02:51,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:02:51,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:02:51,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:51,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:02:51,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:02:51,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:02:51,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:02:51,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:02:51,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:02:51,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:02:51,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:02:51,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:02:51,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:02:51,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:02:51,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:02:51,866 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:02:51,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-08-18 22:02:51,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71464f28a/20ba9aced5f34834886149b3588815e9/FLAGa33c43114 [2020-08-18 22:02:52,407 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:02:52,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/id_build.i [2020-08-18 22:02:52,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71464f28a/20ba9aced5f34834886149b3588815e9/FLAGa33c43114 [2020-08-18 22:02:52,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71464f28a/20ba9aced5f34834886149b3588815e9 [2020-08-18 22:02:52,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:02:52,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:02:52,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:52,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:02:52,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:02:52,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:52" (1/1) ... [2020-08-18 22:02:52,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d90d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:52, skipping insertion in model container [2020-08-18 22:02:52,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:52" (1/1) ... [2020-08-18 22:02:52,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:02:52,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:02:52,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:52,997 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:02:53,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:53,024 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:02:53,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53 WrapperNode [2020-08-18 22:02:53,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:53,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:02:53,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:02:53,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:02:53,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... [2020-08-18 22:02:53,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:02:53,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:02:53,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:02:53,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:02:53,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:53,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:02:53,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:02:53,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:02:53,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:02:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:02:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:02:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:02:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:02:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:02:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:02:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:02:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:02:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:02:53,389 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:02:53,389 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:02:53,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:53 BoogieIcfgContainer [2020-08-18 22:02:53,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:02:53,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:02:53,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:02:53,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:02:53,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:02:52" (1/3) ... [2020-08-18 22:02:53,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fff1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:53, skipping insertion in model container [2020-08-18 22:02:53,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:53" (2/3) ... [2020-08-18 22:02:53,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fff1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:53, skipping insertion in model container [2020-08-18 22:02:53,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:53" (3/3) ... [2020-08-18 22:02:53,402 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-08-18 22:02:53,414 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:02:53,421 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:02:53,442 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:02:53,478 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:02:53,479 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:02:53,479 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:02:53,479 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:02:53,479 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:02:53,479 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:02:53,480 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:02:53,480 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:02:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-18 22:02:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 22:02:53,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:53,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:53,520 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 292259706, now seen corresponding path program 1 times [2020-08-18 22:02:53,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:53,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210530492] [2020-08-18 22:02:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:53,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210530492] [2020-08-18 22:02:53,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:53,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:53,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882309886] [2020-08-18 22:02:53,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:53,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:53,792 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-08-18 22:02:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:53,880 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-08-18 22:02:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:53,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 22:02:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:53,894 INFO L225 Difference]: With dead ends: 43 [2020-08-18 22:02:53,894 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 22:02:53,899 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 [2020-08-18 22:02:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 22:02:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 22:02:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 22:02:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 22:02:53,948 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2020-08-18 22:02:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:53,949 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 22:02:53,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 22:02:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 22:02:53,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:53,951 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:53,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:02:53,952 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1546928273, now seen corresponding path program 1 times [2020-08-18 22:02:53,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:53,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994507191] [2020-08-18 22:02:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:02:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:54,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994507191] [2020-08-18 22:02:54,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:54,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:54,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593491305] [2020-08-18 22:02:54,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:54,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:54,061 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-18 22:02:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:54,121 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-08-18 22:02:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:54,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 22:02:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:54,123 INFO L225 Difference]: With dead ends: 21 [2020-08-18 22:02:54,123 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:02:54,125 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 [2020-08-18 22:02:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:02:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:02:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:02:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:02:54,126 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-08-18 22:02:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:54,127 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:02:54,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:02:54,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:02:54,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:02:54,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:02:54,184 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:02:54,185 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:02:54,185 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:02:54,185 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:02:54,185 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:02:54,186 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:02:54,186 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:02:54,186 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 22:02:54,186 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:02:54,186 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:02:54,187 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-08-18 22:02:54,187 INFO L268 CegarLoopResult]: For program point L19(lines 17 20) no Hoare annotation was computed. [2020-08-18 22:02:54,187 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)) [2020-08-18 22:02:54,187 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-08-18 22:02:54,188 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-08-18 22:02:54,188 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)) [2020-08-18 22:02:54,188 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)) [2020-08-18 22:02:54,189 INFO L268 CegarLoopResult]: For program point L16-2(lines 16 21) no Hoare annotation was computed. [2020-08-18 22:02:54,189 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (<= 0 main_~i~0) [2020-08-18 22:02:54,189 INFO L268 CegarLoopResult]: For program point L16-4(lines 16 21) no Hoare annotation was computed. [2020-08-18 22:02:54,189 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 22:02:54,189 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:02:54,190 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 22:02:54,190 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 22:02:54,190 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:02:54,190 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 22:02:54,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:02:54 BoogieIcfgContainer [2020-08-18 22:02:54,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:02:54,220 INFO L168 Benchmark]: Toolchain (without parser) took 1413.31 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 103.3 MB in the beginning and 125.6 MB in the end (delta: -22.4 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:54,222 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 22:02:54,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.92 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:54,224 INFO L168 Benchmark]: Boogie Preprocessor took 104.30 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 182.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:54,226 INFO L168 Benchmark]: RCFGBuilder took 263.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:54,227 INFO L168 Benchmark]: TraceAbstraction took 818.71 ms. Allocated memory is still 203.4 MB. Free memory was 168.4 MB in the beginning and 125.6 MB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:54,238 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.92 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.30 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 182.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 818.71 ms. Allocated memory is still 203.4 MB. Free memory was 168.4 MB in the beginning and 125.6 MB in the end (delta: 42.8 MB). Peak memory consumption was 42.8 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, 0.0s 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...