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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:35,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:35,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:35,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:35,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:26:35,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:26:35,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:26:35,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:26:35,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:26:35,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:26:35,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:26:35,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:26:35,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:26:35,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:26:35,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:26:35,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:26:35,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:26:35,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:26:35,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:26:35,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:26:35,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:26:35,110 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:35,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:35,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:35,111 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:35,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:35,112 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:35,112 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:35,112 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:35,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:35,113 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:35,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:35,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:35,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:35,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:35,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:35,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:35,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:35,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:35,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:35,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:35,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:35,116 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:35,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:35,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:35,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:35,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:35,117 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:35,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:35,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:35,117 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:35,150 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:35,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:35,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:35,166 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:35,166 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:35,167 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-09-20 13:26:35,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952fe016b/ff9f1fdd0ac841f09afe2427853fcf9d/FLAGab1f76930 [2019-09-20 13:26:35,722 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:35,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-09-20 13:26:35,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952fe016b/ff9f1fdd0ac841f09afe2427853fcf9d/FLAGab1f76930 [2019-09-20 13:26:36,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952fe016b/ff9f1fdd0ac841f09afe2427853fcf9d [2019-09-20 13:26:36,079 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:36,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:36,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:36,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:36,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:36,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbcf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36, skipping insertion in model container [2019-09-20 13:26:36,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,096 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:36,111 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:36,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:36,267 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:36,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:36,311 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:36,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36 WrapperNode [2019-09-20 13:26:36,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:36,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:36,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:36,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:36,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (1/1) ... [2019-09-20 13:26:36,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:36,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:36,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:36,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:36,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (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 [2019-09-20 13:26:36,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:36,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:26:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:26:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:26:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:26:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:26:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:26:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:36,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:36,733 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:36,733 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 13:26:36,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:36 BoogieIcfgContainer [2019-09-20 13:26:36,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:36,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:36,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:36,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:36,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:36" (1/3) ... [2019-09-20 13:26:36,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e55edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:36, skipping insertion in model container [2019-09-20 13:26:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:36" (2/3) ... [2019-09-20 13:26:36,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e55edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:36, skipping insertion in model container [2019-09-20 13:26:36,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:36" (3/3) ... [2019-09-20 13:26:36,742 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-09-20 13:26:36,751 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:36,758 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:36,775 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:36,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:36,801 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:36,801 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:36,801 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:36,801 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:36,801 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:36,801 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:36,801 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-20 13:26:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:26:36,822 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:36,823 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:36,825 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-09-20 13:26:36,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:36,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:36,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:36,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:36,877 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:36,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:36,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:36,956 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:36,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:36,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:36,974 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-20 13:26:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:36,992 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-09-20 13:26:36,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:36,994 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-20 13:26:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:37,003 INFO L225 Difference]: With dead ends: 29 [2019-09-20 13:26:37,004 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 13:26:37,006 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 13:26:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-20 13:26:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-20 13:26:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-20 13:26:37,042 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-20 13:26:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:37,042 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-20 13:26:37,043 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-20 13:26:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:26:37,044 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:37,044 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:37,044 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-09-20 13:26:37,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:37,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:37,048 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:37,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:37,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:37,108 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:37,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:37,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:37,110 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-20 13:26:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:37,167 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-09-20 13:26:37,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:37,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-20 13:26:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:37,170 INFO L225 Difference]: With dead ends: 29 [2019-09-20 13:26:37,170 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 13:26:37,171 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 13:26:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-20 13:26:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 13:26:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-20 13:26:37,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-20 13:26:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:37,179 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-20 13:26:37,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-20 13:26:37,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 13:26:37,180 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:37,180 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:37,181 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-09-20 13:26:37,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:37,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:37,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:37,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:37,184 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:26:37,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:37,331 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:37,332 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-20 13:26:37,334 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [25], [27], [32], [34], [38], [46], [49], [61], [64], [66], [72], [73], [74], [76] [2019-09-20 13:26:37,369 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:37,369 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:37,451 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:26:37,452 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 25 variables. [2019-09-20 13:26:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:37,456 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:26:37,491 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:26:37,492 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:26:37,494 INFO L420 sIntCurrentIteration]: We unified 20 AI predicates to 20 [2019-09-20 13:26:37,494 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:26:37,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:26:37,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2019-09-20 13:26:37,495 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:37,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:37,496 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 2 states. [2019-09-20 13:26:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:37,497 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:26:37,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:37,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-09-20 13:26:37,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:37,498 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:26:37,498 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:37,499 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:37,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2019-09-20 13:26:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:37,500 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:37,500 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:37,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:37,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:37 BoogieIcfgContainer [2019-09-20 13:26:37,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:37,508 INFO L168 Benchmark]: Toolchain (without parser) took 1425.96 ms. Allocated memory was 139.5 MB in the beginning and 198.7 MB in the end (delta: 59.2 MB). Free memory was 87.5 MB in the beginning and 117.7 MB in the end (delta: -30.2 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:37,509 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 105.5 MB in the beginning and 105.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:37,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.18 ms. Allocated memory is still 139.5 MB. Free memory was 87.1 MB in the beginning and 77.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:37,511 INFO L168 Benchmark]: Boogie Preprocessor took 126.56 ms. Allocated memory was 139.5 MB in the beginning and 198.7 MB in the end (delta: 59.2 MB). Free memory was 77.4 MB in the beginning and 176.1 MB in the end (delta: -98.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:37,513 INFO L168 Benchmark]: RCFGBuilder took 294.93 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 160.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:37,517 INFO L168 Benchmark]: TraceAbstraction took 769.95 ms. Allocated memory is still 198.7 MB. Free memory was 160.3 MB in the beginning and 117.7 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:37,523 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 139.5 MB. Free memory was 105.5 MB in the beginning and 105.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 230.18 ms. Allocated memory is still 139.5 MB. Free memory was 87.1 MB in the beginning and 77.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.56 ms. Allocated memory was 139.5 MB in the beginning and 198.7 MB in the end (delta: 59.2 MB). Free memory was 77.4 MB in the beginning and 176.1 MB in the end (delta: -98.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.93 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 160.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 769.95 ms. Allocated memory is still 198.7 MB. Free memory was 160.3 MB in the beginning and 117.7 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 4 SDslu, 18 SDs, 0 SdLazy, 14 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.925 AbsIntWeakeningRatio, 0.85 AbsIntAvgWeakeningVarsNumRemoved, 0.3 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...