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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:06,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:06,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:06,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:06,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:06,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:06,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:06,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:06,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:06,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:06,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:06,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:06,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:06,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:06,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:06,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:06,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:06,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:06,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:06,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:06,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:06,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:06,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:06,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:06,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:06,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:06,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:06,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:06,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:06,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:06,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:06,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:06,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:06,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:06,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:06,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:06,401 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:16:06,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:06,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:06,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:06,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:06,428 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:06,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:06,428 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:06,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:06,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:06,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:06,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:06,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:06,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:06,431 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:06,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:06,431 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:06,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:06,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:06,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:06,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:06,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:06,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:06,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:06,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:06,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:06,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:06,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:06,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:06,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:06,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:06,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:06,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:06,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:06,733 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:06,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-14 23:16:06,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e64a081c/230299ea616644c69b68a16ba9ad701b/FLAG63860af78 [2019-10-14 23:16:07,262 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:07,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-14 23:16:07,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e64a081c/230299ea616644c69b68a16ba9ad701b/FLAG63860af78 [2019-10-14 23:16:07,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e64a081c/230299ea616644c69b68a16ba9ad701b [2019-10-14 23:16:07,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:07,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:07,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:07,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:07,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:07,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:07,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6836b2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07, skipping insertion in model container [2019-10-14 23:16:07,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:07,679 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:07,695 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:07,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:07,876 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:07,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:07,907 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:07,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07 WrapperNode [2019-10-14 23:16:07,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:07,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:07,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:07,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:07,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:07,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:08,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:08,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:08,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:08,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:08,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... [2019-10-14 23:16:08,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:08,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:08,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:08,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:08,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-14 23:16:08,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:08,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:08,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:08,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:16:08,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:16:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:08,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:08,268 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:08,268 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:16:08,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:08 BoogieIcfgContainer [2019-10-14 23:16:08,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:08,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:08,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:08,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:08,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:07" (1/3) ... [2019-10-14 23:16:08,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a66e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:08, skipping insertion in model container [2019-10-14 23:16:08,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:07" (2/3) ... [2019-10-14 23:16:08,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a66e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:08, skipping insertion in model container [2019-10-14 23:16:08,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:08" (3/3) ... [2019-10-14 23:16:08,277 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-10-14 23:16:08,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:08,295 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:08,305 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:08,329 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:08,329 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:08,329 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:08,329 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:08,330 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:08,330 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:08,330 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:08,330 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-14 23:16:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:16:08,354 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,355 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:08,357 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-10-14 23:16:08,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198315657] [2019-10-14 23:16:08,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198315657] [2019-10-14 23:16:08,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:08,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:16:08,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884762777] [2019-10-14 23:16:08,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:08,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:08,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:08,787 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-10-14 23:16:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,949 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-10-14 23:16:08,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:08,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-14 23:16:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,961 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:16:08,962 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:16:08,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:16:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-14 23:16:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:16:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-14 23:16:09,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-10-14 23:16:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,029 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-14 23:16:09,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-14 23:16:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:09,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,033 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,033 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-10-14 23:16:09,035 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989249517] [2019-10-14 23:16:09,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:09,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989249517] [2019-10-14 23:16:09,274 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:09,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 23:16:09,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605051189] [2019-10-14 23:16:09,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:16:09,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:09,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:16:09,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:09,279 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-10-14 23:16:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,421 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-14 23:16:09,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:09,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-14 23:16:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,424 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:09,425 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:16:09,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:16:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-14 23:16:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:16:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-14 23:16:09,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-10-14 23:16:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,439 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-14 23:16:09,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:16:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-14 23:16:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:16:09,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,442 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,443 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-10-14 23:16:09,444 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664333527] [2019-10-14 23:16:09,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:09,511 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 23:16:09,512 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 23:16:09,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:09 BoogieIcfgContainer [2019-10-14 23:16:09,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:09,536 INFO L168 Benchmark]: Toolchain (without parser) took 1873.37 ms. Allocated memory was 142.1 MB in the beginning and 201.9 MB in the end (delta: 59.8 MB). Free memory was 101.6 MB in the beginning and 100.7 MB in the end (delta: 863.5 kB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:09,537 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.1 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:09,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.15 ms. Allocated memory is still 142.1 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:09,540 INFO L168 Benchmark]: Boogie Preprocessor took 105.21 ms. Allocated memory was 142.1 MB in the beginning and 201.9 MB in the end (delta: 59.8 MB). Free memory was 91.8 MB in the beginning and 180.1 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:09,541 INFO L168 Benchmark]: RCFGBuilder took 255.45 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 168.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:09,542 INFO L168 Benchmark]: TraceAbstraction took 1263.09 ms. Allocated memory is still 201.9 MB. Free memory was 168.0 MB in the beginning and 100.7 MB in the end (delta: 67.2 MB). Peak memory consumption was 67.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:09,546 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.1 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.15 ms. Allocated memory is still 142.1 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.21 ms. Allocated memory was 142.1 MB in the beginning and 201.9 MB in the end (delta: 59.8 MB). Free memory was 91.8 MB in the beginning and 180.1 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 255.45 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 168.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1263.09 ms. Allocated memory is still 201.9 MB. Free memory was 168.0 MB in the beginning and 100.7 MB in the end (delta: 67.2 MB). Peak memory consumption was 67.2 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: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i