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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:37:06,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:37:06,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:37:06,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:37:06,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:37:06,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:37:06,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:37:06,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:37:06,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:37:06,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:37:06,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:37:06,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:37:06,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:37:06,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:37:06,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:37:06,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:37:06,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:37:06,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:37:06,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:37:06,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:37:06,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:37:06,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:37:06,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:37:06,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:37:06,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-03 20:37:06,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-03 20:37:06,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-03 20:37:06,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-03 20:37:06,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-03 20:37:06,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-03 20:37:06,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:37:06,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:37:06,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:37:06,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:37:06,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:37:06,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:37:06,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:37:06,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:37:06,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:37:06,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:37:06,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:37:06,803 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 [2019-09-03 20:37:06,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:37:06,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:37:06,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:37:06,819 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:37:06,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:37:06,820 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:37:06,820 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:37:06,820 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:37:06,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:37:06,821 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:37:06,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:37:06,822 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:37:06,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:37:06,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:37:06,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:37:06,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:37:06,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:37:06,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:37:06,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:37:06,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:37:06,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:37:06,824 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:37:06,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:37:06,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:37:06,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:37:06,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:37:06,825 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:37:06,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:37:06,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:37:06,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:37:06,854 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:37:06,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:37:06,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:37:06,872 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:37:06,873 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:37:06,873 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2019-09-03 20:37:06,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1adb6f12/420fbb640e34433c9f209bc182de5d35/FLAG1e7f9e860 [2019-09-03 20:37:07,388 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:37:07,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2019-09-03 20:37:07,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1adb6f12/420fbb640e34433c9f209bc182de5d35/FLAG1e7f9e860 [2019-09-03 20:37:07,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1adb6f12/420fbb640e34433c9f209bc182de5d35 [2019-09-03 20:37:07,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:37:07,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:37:07,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:37:07,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:37:07,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:37:07,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:37:07" (1/1) ... [2019-09-03 20:37:07,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c8f7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:07, skipping insertion in model container [2019-09-03 20:37:07,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:37:07" (1/1) ... [2019-09-03 20:37:07,792 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:37:07,812 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:37:08,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:37:08,035 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:37:08,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:37:08,171 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:37:08,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08 WrapperNode [2019-09-03 20:37:08,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:37:08,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:37:08,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:37:08,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:37:08,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (1/1) ... [2019-09-03 20:37:08,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:37:08,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:37:08,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:37:08,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:37:08,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (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 [2019-09-03 20:37:08,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:37:08,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:37:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:37:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:37:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:37:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:37:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-03 20:37:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:37:08,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 20:37:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-03 20:37:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 20:37:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 20:37:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 20:37:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:37:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:37:08,642 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:37:08,643 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-03 20:37:08,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:37:08 BoogieIcfgContainer [2019-09-03 20:37:08,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:37:08,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:37:08,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:37:08,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:37:08,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:37:07" (1/3) ... [2019-09-03 20:37:08,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166746b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:37:08, skipping insertion in model container [2019-09-03 20:37:08,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:37:08" (2/3) ... [2019-09-03 20:37:08,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166746b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:37:08, skipping insertion in model container [2019-09-03 20:37:08,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:37:08" (3/3) ... [2019-09-03 20:37:08,652 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2019-09-03 20:37:08,662 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:37:08,670 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:37:08,686 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:37:08,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:37:08,712 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:37:08,712 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:37:08,712 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:37:08,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:37:08,712 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:37:08,713 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:37:08,713 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:37:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-09-03 20:37:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:37:08,737 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:08,738 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:08,740 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash 907546272, now seen corresponding path program 1 times [2019-09-03 20:37:08,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:08,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:08,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:08,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:08,793 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:08,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:37:08,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:37:08,890 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:08,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:37:08,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:37:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:37:08,909 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-09-03 20:37:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:08,925 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-03 20:37:08,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:37:08,927 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-03 20:37:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:08,937 INFO L225 Difference]: With dead ends: 36 [2019-09-03 20:37:08,937 INFO L226 Difference]: Without dead ends: 29 [2019-09-03 20:37:08,939 INFO L628 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 [2019-09-03 20:37:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-03 20:37:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-03 20:37:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 20:37:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-09-03 20:37:08,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-09-03 20:37:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:08,980 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-09-03 20:37:08,980 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:37:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-09-03 20:37:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:37:08,982 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:08,982 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:08,982 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1455815888, now seen corresponding path program 1 times [2019-09-03 20:37:08,983 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:08,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:08,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:08,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:08,985 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:09,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:37:09,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:37:09,102 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:09,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:37:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:37:09,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:37:09,105 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2019-09-03 20:37:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:09,208 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2019-09-03 20:37:09,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:37:09,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-03 20:37:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:09,214 INFO L225 Difference]: With dead ends: 44 [2019-09-03 20:37:09,214 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 20:37:09,216 INFO L628 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 [2019-09-03 20:37:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 20:37:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2019-09-03 20:37:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:37:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-03 20:37:09,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-09-03 20:37:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:09,228 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-03 20:37:09,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:37:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-03 20:37:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 20:37:09,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:37:09,230 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:37:09,231 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:37:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash -941161554, now seen corresponding path program 1 times [2019-09-03 20:37:09,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:37:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:09,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:37:09,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:37:09,235 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:37:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:37:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:37:09,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:37:09,397 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:37:09,398 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-03 20:37:09,400 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [24], [27], [33], [39], [64], [69], [72], [100], [103], [105], [111], [112], [113], [115] [2019-09-03 20:37:09,442 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:37:09,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:37:09,546 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-03 20:37:09,547 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 26 variables. [2019-09-03 20:37:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:37:09,550 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-03 20:37:09,585 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-03 20:37:09,585 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-03 20:37:09,587 INFO L420 sIntCurrentIteration]: We unified 20 AI predicates to 20 [2019-09-03 20:37:09,587 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-03 20:37:09,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:37:09,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-03 20:37:09,588 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:37:09,589 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:37:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:37:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:37:09,590 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 2 states. [2019-09-03 20:37:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:37:09,590 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-03 20:37:09,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:37:09,591 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-09-03 20:37:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:37:09,591 INFO L225 Difference]: With dead ends: 6 [2019-09-03 20:37:09,591 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:37:09,592 INFO L628 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 [2019-09-03 20:37:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:37:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:37:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:37:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:37:09,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2019-09-03 20:37:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:37:09,593 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:37:09,593 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:37:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:37:09,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:37:09,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:37:09 BoogieIcfgContainer [2019-09-03 20:37:09,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:37:09,602 INFO L168 Benchmark]: Toolchain (without parser) took 1824.88 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 86.5 MB in the beginning and 107.9 MB in the end (delta: -21.4 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:09,604 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 131.1 MB. Free memory was 105.2 MB in the beginning and 105.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:37:09,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.49 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 86.3 MB in the beginning and 175.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:09,608 INFO L168 Benchmark]: Boogie Preprocessor took 44.87 ms. Allocated memory is still 198.7 MB. Free memory was 175.4 MB in the beginning and 173.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:09,609 INFO L168 Benchmark]: RCFGBuilder took 426.54 ms. Allocated memory is still 198.7 MB. Free memory was 173.1 MB in the beginning and 154.7 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:09,611 INFO L168 Benchmark]: TraceAbstraction took 953.76 ms. Allocated memory is still 198.7 MB. Free memory was 154.1 MB in the beginning and 107.9 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2019-09-03 20:37:09,622 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 131.1 MB. Free memory was 105.2 MB in the beginning and 105.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 395.49 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 86.3 MB in the beginning and 175.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.87 ms. Allocated memory is still 198.7 MB. Free memory was 175.4 MB in the beginning and 173.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.54 ms. Allocated memory is still 198.7 MB. Free memory was 173.1 MB in the beginning and 154.7 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 953.76 ms. Allocated memory is still 198.7 MB. Free memory was 154.1 MB in the beginning and 107.9 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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, 36 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 75 SDtfs, 16 SDslu, 23 SDs, 0 SdLazy, 19 SolverSat, 3 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=36occurred 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, 0.8875 AbsIntWeakeningRatio, 1.05 AbsIntAvgWeakeningVarsNumRemoved, 0.3 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1296 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...