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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:28:48,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:28:48,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:28:48,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:28:48,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:28:48,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:28:48,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:28:48,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:28:48,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:28:48,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:28:48,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:28:48,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:28:48,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:28:48,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:28:48,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:28:48,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:28:48,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:28:48,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:28:48,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:28:48,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:28:48,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:28:48,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:28:48,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:28:48,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:28:48,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:28:48,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:28:48,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:28:48,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:28:48,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:28:48,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:28:48,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:28:48,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:28:48,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:28:48,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:28:48,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:28:48,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:28:48,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:28:48,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:28:48,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:28:48,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:28:48,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:28:48,656 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 13:28:48,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:28:48,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:28:48,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:28:48,680 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:28:48,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:28:48,681 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:28:48,682 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:28:48,682 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:28:48,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:28:48,682 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:28:48,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:28:48,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:28:48,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:28:48,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:28:48,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:28:48,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:28:48,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:28:48,684 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:28:48,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:28:48,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:28:48,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:28:48,686 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:28:48,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:28:48,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:28:48,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:28:48,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:28:48,688 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:28:48,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:28:48,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:28:48,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:28:48,729 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:28:48,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:28:48,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:28:48,745 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:28:48,746 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:28:48,746 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-09-20 13:28:48,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91fd0d03a/94d8db5a0b3d4f468a8bf0a5fcf2b3d3/FLAG2e5d2b4b7 [2019-09-20 13:28:49,288 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:28:49,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-09-20 13:28:49,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91fd0d03a/94d8db5a0b3d4f468a8bf0a5fcf2b3d3/FLAG2e5d2b4b7 [2019-09-20 13:28:49,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91fd0d03a/94d8db5a0b3d4f468a8bf0a5fcf2b3d3 [2019-09-20 13:28:49,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:28:49,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:28:49,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:49,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:28:49,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:28:49,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:49,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5264ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49, skipping insertion in model container [2019-09-20 13:28:49,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:49,751 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:28:49,766 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:28:49,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:49,971 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:28:49,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:49,997 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:28:49,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49 WrapperNode [2019-09-20 13:28:49,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:49,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:28:49,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:28:49,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:28:50,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (1/1) ... [2019-09-20 13:28:50,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:28:50,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:28:50,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:28:50,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:28:50,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (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 13:28:50,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:28:50,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:28:50,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-09-20 13:28:50,164 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-09-20 13:28:50,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:28:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:28:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-09-20 13:28:50,164 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-09-20 13:28:50,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:28:50,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:28:50,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:28:50,303 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:28:50,304 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:28:50,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:50 BoogieIcfgContainer [2019-09-20 13:28:50,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:28:50,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:28:50,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:28:50,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:28:50,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:28:49" (1/3) ... [2019-09-20 13:28:50,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4168ec22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:50, skipping insertion in model container [2019-09-20 13:28:50,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:49" (2/3) ... [2019-09-20 13:28:50,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4168ec22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:50, skipping insertion in model container [2019-09-20 13:28:50,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:50" (3/3) ... [2019-09-20 13:28:50,312 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-09-20 13:28:50,321 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:28:50,329 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:28:50,345 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:28:50,369 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:28:50,369 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:28:50,369 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:28:50,369 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:28:50,369 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:28:50,370 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:28:50,370 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:28:50,370 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:28:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-20 13:28:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-20 13:28:50,395 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:50,395 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:50,398 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:50,404 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-09-20 13:28:50,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:50,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:50,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:50,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:50,453 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:50,606 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 13:28:50,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:50,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:28:50,610 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:50,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:28:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:28:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:28:50,642 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-09-20 13:28:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:50,748 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-20 13:28:50,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:28:50,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-20 13:28:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:50,759 INFO L225 Difference]: With dead ends: 26 [2019-09-20 13:28:50,759 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 13:28:50,761 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:28:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 13:28:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-09-20 13:28:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-20 13:28:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-20 13:28:50,798 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-09-20 13:28:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:50,798 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-20 13:28:50,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:28:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-20 13:28:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:28:50,800 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:50,800 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:50,801 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-09-20 13:28:50,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:50,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:50,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:50,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:50,803 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:50,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:28:50,903 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:28:50,904 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-20 13:28:50,906 INFO L207 CegarAbsIntRunner]: [0], [1], [4], [6], [9], [10], [16], [25], [32], [34], [35], [36], [38], [39] [2019-09-20 13:28:50,935 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:28:50,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:28:51,138 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:28:51,141 INFO L272 AbstractInterpreter]: Visited 14 different actions 59 times. Merged at 2 different actions 10 times. Widened at 1 different actions 1 times. Performed 73 root evaluator evaluations with a maximum evaluation depth of 7. Performed 73 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-20 13:28:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:51,145 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:28:51,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:28:51,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:28:51,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:51,159 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:28:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:51,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 13:28:51,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:28:51,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:28:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:51,239 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:28:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:51,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:28:51,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2019-09-20 13:28:51,296 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:28:51,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:28:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:28:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:28:51,298 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2019-09-20 13:28:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:51,376 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-20 13:28:51,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:28:51,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-09-20 13:28:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:51,378 INFO L225 Difference]: With dead ends: 27 [2019-09-20 13:28:51,378 INFO L226 Difference]: Without dead ends: 27 [2019-09-20 13:28:51,379 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:28:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-20 13:28:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-09-20 13:28:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 13:28:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-20 13:28:51,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-09-20 13:28:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:51,387 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-20 13:28:51,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:28:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-20 13:28:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-20 13:28:51,390 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:51,390 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:51,390 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-09-20 13:28:51,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:51,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:51,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:51,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:51,397 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:28:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 13:28:51,479 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 13:28:51,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:28:51 BoogieIcfgContainer [2019-09-20 13:28:51,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:28:51,511 INFO L168 Benchmark]: Toolchain (without parser) took 1774.46 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 87.8 MB in the beginning and 93.7 MB in the end (delta: -5.8 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:51,513 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:28:51,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.52 ms. Allocated memory is still 132.1 MB. Free memory was 87.6 MB in the beginning and 78.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:51,517 INFO L168 Benchmark]: Boogie Preprocessor took 105.83 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.1 MB in the beginning and 175.6 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:51,518 INFO L168 Benchmark]: RCFGBuilder took 201.36 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 164.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:51,520 INFO L168 Benchmark]: TraceAbstraction took 1201.84 ms. Allocated memory is still 198.7 MB. Free memory was 163.5 MB in the beginning and 93.7 MB in the end (delta: 69.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:51,532 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.52 ms. Allocated memory is still 132.1 MB. Free memory was 87.6 MB in the beginning and 78.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.83 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.1 MB in the beginning and 175.6 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 201.36 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 164.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1201.84 ms. Allocated memory is still 198.7 MB. Free memory was 163.5 MB in the beginning and 93.7 MB in the end (delta: 69.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. UNSAFE Result, 1.1s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 15 SDslu, 118 SDs, 0 SdLazy, 54 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1624 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...