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/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:16:37,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:16:37,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:16:37,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:16:37,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:16:37,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:16:37,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:16:37,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:16:37,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:16:37,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:16:37,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:16:37,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:16:37,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:16:37,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:16:37,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:16:37,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:16:37,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:16:37,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:16:37,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:16:37,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:16:37,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:16:37,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:16:37,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:16:37,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:16:37,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:16:37,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:16:38,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:16:38,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:16:38,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:16:38,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:16:38,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:16:38,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:16:38,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:16:38,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:16:38,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:16:38,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:16:38,006 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 [2019-10-13 19:16:38,020 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:16:38,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:16:38,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:16:38,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:16:38,022 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:16:38,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:16:38,023 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:16:38,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:16:38,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:16:38,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:16:38,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:16:38,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:16:38,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:16:38,024 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:16:38,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:16:38,025 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:16:38,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:16:38,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:16:38,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:16:38,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:16:38,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:16:38,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:38,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:16:38,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:16:38,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:16:38,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:16:38,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:16:38,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:16:38,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:16:38,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:16:38,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:16:38,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:16:38,353 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:16:38,354 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:16:38,355 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2019-10-13 19:16:38,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0390fa219/a11e793995a546a296b4714c76c11d1f/FLAGd06bb3341 [2019-10-13 19:16:38,870 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:16:38,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2019-10-13 19:16:38,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0390fa219/a11e793995a546a296b4714c76c11d1f/FLAGd06bb3341 [2019-10-13 19:16:39,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0390fa219/a11e793995a546a296b4714c76c11d1f [2019-10-13 19:16:39,236 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:16:39,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:16:39,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:39,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:16:39,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:16:39,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654cfaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39, skipping insertion in model container [2019-10-13 19:16:39,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,254 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:16:39,278 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:16:39,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:39,508 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:16:39,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:39,543 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:16:39,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39 WrapperNode [2019-10-13 19:16:39,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:39,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:16:39,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:16:39,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:16:39,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (1/1) ... [2019-10-13 19:16:39,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:16:39,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:16:39,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:16:39,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:16:39,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (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 [2019-10-13 19:16:39,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:16:39,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:16:39,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:16:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:16:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:16:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:16:39,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:16:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:16:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:16:39,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:16:39,911 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:16:39,911 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:16:39,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:39 BoogieIcfgContainer [2019-10-13 19:16:39,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:16:39,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:16:39,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:16:39,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:16:39,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:39" (1/3) ... [2019-10-13 19:16:39,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31809640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:39, skipping insertion in model container [2019-10-13 19:16:39,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:39" (2/3) ... [2019-10-13 19:16:39,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31809640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:39, skipping insertion in model container [2019-10-13 19:16:39,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:39" (3/3) ... [2019-10-13 19:16:39,921 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2019-10-13 19:16:39,931 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:16:39,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:16:39,963 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:16:40,037 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:16:40,038 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:16:40,038 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:16:40,038 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:16:40,038 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:16:40,038 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:16:40,039 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:16:40,039 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:16:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-13 19:16:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:16:40,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:40,079 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:40,081 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-13 19:16:40,106 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:40,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827411769] [2019-10-13 19:16:40,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:40,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:40,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:40,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827411769] [2019-10-13 19:16:40,286 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:40,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:16:40,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955682057] [2019-10-13 19:16:40,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:16:40,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:16:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:16:40,305 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-13 19:16:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:40,400 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-13 19:16:40,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:16:40,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-13 19:16:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:40,411 INFO L225 Difference]: With dead ends: 26 [2019-10-13 19:16:40,411 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 19:16:40,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:16:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 19:16:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 19:16:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 19:16:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 19:16:40,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 19:16:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:40,448 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 19:16:40,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:16:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 19:16:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 19:16:40,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:40,450 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:40,450 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:40,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:40,451 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-13 19:16:40,451 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:40,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728694698] [2019-10-13 19:16:40,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:40,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:40,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:40,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728694698] [2019-10-13 19:16:40,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729152959] [2019-10-13 19:16:40,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:40,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:16:40,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:40,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:40,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:40,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-13 19:16:40,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802975808] [2019-10-13 19:16:40,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:16:40,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:16:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:16:40,709 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2019-10-13 19:16:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:40,752 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-13 19:16:40,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:16:40,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-13 19:16:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:40,753 INFO L225 Difference]: With dead ends: 13 [2019-10-13 19:16:40,753 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 19:16:40,754 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:16:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 19:16:40,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 19:16:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 19:16:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 19:16:40,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-10-13 19:16:40,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:40,756 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 19:16:40,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:16:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 19:16:40,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 19:16:40,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:40,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 19:16:41,058 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:16:41,059 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_65~0 |old(~__return_65~0)|)) [2019-10-13 19:16:41,059 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:16:41,059 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:16:41,059 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 19:16:41,059 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:16:41,060 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:16:41,060 INFO L439 ceAbstractionStarter]: At program point L32(lines 25 53) the Hoare annotation is: (let ((.cse0 (= ~__return_65~0 |old(~__return_65~0)|))) (or (and .cse0 (<= (+ main_~main__x~0 2) main_~main__y~0)) (and .cse0 (<= (+ main_~main__x~0 50) 0)))) [2019-10-13 19:16:41,060 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 8 55) the Hoare annotation is: (= ~__return_65~0 |old(~__return_65~0)|) [2019-10-13 19:16:41,060 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 8 55) no Hoare annotation was computed. [2019-10-13 19:16:41,060 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 53) no Hoare annotation was computed. [2019-10-13 19:16:41,061 INFO L443 ceAbstractionStarter]: For program point L14(lines 14 54) no Hoare annotation was computed. [2019-10-13 19:16:41,061 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 8 55) no Hoare annotation was computed. [2019-10-13 19:16:41,061 INFO L443 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2019-10-13 19:16:41,061 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2019-10-13 19:16:41,061 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-10-13 19:16:41,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:16:41 BoogieIcfgContainer [2019-10-13 19:16:41,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:16:41,089 INFO L168 Benchmark]: Toolchain (without parser) took 1850.16 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 101.9 MB in the beginning and 117.6 MB in the end (delta: -15.8 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:16:41,099 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 19:16:41,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.25 ms. Allocated memory is still 144.2 MB. Free memory was 101.6 MB in the beginning and 92.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:16:41,104 INFO L168 Benchmark]: Boogie Preprocessor took 124.18 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 92.2 MB in the beginning and 181.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:16:41,105 INFO L168 Benchmark]: RCFGBuilder took 244.28 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 169.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-10-13 19:16:41,106 INFO L168 Benchmark]: TraceAbstraction took 1171.87 ms. Allocated memory is still 202.4 MB. Free memory was 169.8 MB in the beginning and 117.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2019-10-13 19:16:41,115 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.25 ms. Allocated memory is still 144.2 MB. Free memory was 101.6 MB in the beginning and 92.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.18 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 92.2 MB in the beginning and 181.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.28 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 169.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1171.87 ms. Allocated memory is still 202.4 MB. Free memory was 169.8 MB in the beginning and 117.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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: 25]: Loop Invariant Derived loop invariant: (__return_65 == \old(__return_65) && main__x + 2 <= main__y) || (__return_65 == \old(__return_65) && main__x + 50 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 14 SDslu, 25 SDs, 0 SdLazy, 18 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 5 LocationsWithAnnotation, 5 PreInvPairs, 6 NumberOfFragments, 31 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 863 SizeOfPredicates, 4 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...