/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:33:15,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:33:15,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:33:15,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:33:15,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:33:15,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:33:15,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:33:15,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:33:15,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:33:15,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:33:15,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:33:15,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:33:15,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:33:15,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:33:15,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:33:15,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:33:15,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:33:15,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:33:15,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:33:15,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:33:15,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:33:15,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:33:15,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:33:15,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:33:15,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:33:15,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:33:15,676 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:33:15,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:33:15,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:33:15,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:33:15,682 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:33:15,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:33:15,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:33:15,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:33:15,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:33:15,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:33:15,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:33:15,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:33:15,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:33:15,684 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:33:15,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:33:15,684 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:33:15,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:33:15,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:33:15,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:33:15,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:33:15,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:33:15,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:33:15,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:33:15,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:33:15,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:33:15,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:33:15,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:33:15,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:33:15,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:33:15,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:33:15,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:33:15,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:33:15,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:33:15,994 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:33:15,995 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2019-11-07 00:33:16,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe2705f3/5dc95456c96446d8a87d3a9da4820bb8/FLAGe44c4677d [2019-11-07 00:33:16,423 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:33:16,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2019-11-07 00:33:16,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe2705f3/5dc95456c96446d8a87d3a9da4820bb8/FLAGe44c4677d [2019-11-07 00:33:16,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe2705f3/5dc95456c96446d8a87d3a9da4820bb8 [2019-11-07 00:33:16,846 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:33:16,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:33:16,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:33:16,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:33:16,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:33:16,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:33:16" (1/1) ... [2019-11-07 00:33:16,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:16, skipping insertion in model container [2019-11-07 00:33:16,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:33:16" (1/1) ... [2019-11-07 00:33:16,894 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:33:16,931 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:33:17,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:33:17,183 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:33:17,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:33:17,217 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:33:17,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17 WrapperNode [2019-11-07 00:33:17,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:33:17,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:33:17,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:33:17,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:33:17,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (1/1) ... [2019-11-07 00:33:17,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:33:17,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:33:17,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:33:17,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:33:17,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (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 [2019-11-07 00:33:17,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:33:17,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:33:17,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:33:17,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:33:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:33:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:33:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:33:17,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:33:17,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:33:17,558 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:33:17,558 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:33:17,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:33:17 BoogieIcfgContainer [2019-11-07 00:33:17,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:33:17,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:33:17,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:33:17,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:33:17,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:33:16" (1/3) ... [2019-11-07 00:33:17,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b909ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:33:17, skipping insertion in model container [2019-11-07 00:33:17,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:33:17" (2/3) ... [2019-11-07 00:33:17,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b909ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:33:17, skipping insertion in model container [2019-11-07 00:33:17,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:33:17" (3/3) ... [2019-11-07 00:33:17,567 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2019-11-07 00:33:17,576 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:33:17,582 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:33:17,592 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:33:17,615 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:33:17,615 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:33:17,615 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:33:17,615 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:33:17,616 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:33:17,616 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:33:17,616 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:33:17,616 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:33:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 00:33:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:33:17,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:17,638 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:17,640 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-11-07 00:33:17,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:17,652 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383451147] [2019-11-07 00:33:17,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:17,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383451147] [2019-11-07 00:33:17,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:33:17,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:33:17,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587300078] [2019-11-07 00:33:17,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:33:17,893 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:17,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:33:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:33:17,912 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-07 00:33:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:33:17,947 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-07 00:33:17,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:33:17,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 00:33:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:33:17,955 INFO L225 Difference]: With dead ends: 29 [2019-11-07 00:33:17,956 INFO L226 Difference]: Without dead ends: 12 [2019-11-07 00:33:17,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:33:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-07 00:33:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-07 00:33:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-07 00:33:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-07 00:33:17,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-07 00:33:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:33:17,993 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-07 00:33:17,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:33:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-07 00:33:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 00:33:17,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:33:17,994 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:33:17,994 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:33:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:17,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-11-07 00:33:17,995 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:33:17,996 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578912569] [2019-11-07 00:33:17,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:33:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:18,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578912569] [2019-11-07 00:33:18,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043285370] [2019-11-07 00:33:18,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:33:18,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 00:33:18,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:33:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:18,186 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:33:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:33:18,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1381393878] [2019-11-07 00:33:18,297 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 12 [2019-11-07 00:33:18,327 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 00:33:18,327 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 00:33:18,379 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-11-07 00:33:18,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-11-07 00:33:18,436 INFO L272 AbstractInterpreter]: Visited 11 different actions 41 times. Merged at 2 different actions 10 times. Widened at 1 different actions 3 times. Performed 74 root evaluator evaluations with a maximum evaluation depth of 5. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-11-07 00:33:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:33:18,440 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:33:18,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:33:18,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2019-11-07 00:33:18,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951687247] [2019-11-07 00:33:18,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:33:18,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:33:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:33:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:33:18,443 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2019-11-07 00:33:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:33:18,556 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-11-07 00:33:18,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 00:33:18,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-07 00:33:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:33:18,557 INFO L225 Difference]: With dead ends: 17 [2019-11-07 00:33:18,557 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 00:33:18,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-07 00:33:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 00:33:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 00:33:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 00:33:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 00:33:18,559 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2019-11-07 00:33:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:33:18,560 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 00:33:18,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:33:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 00:33:18,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 00:33:18,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:33:18,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 00:33:18,819 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 00:33:18,819 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:33:18,820 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:33:18,820 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 00:33:18,820 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 00:33:18,820 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 00:33:18,820 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2019-11-07 00:33:18,821 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2019-11-07 00:33:18,821 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2019-11-07 00:33:18,821 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (let ((.cse0 (mod main_~x~0 4294967296))) (or (< .cse0 6) (= 6 .cse0))) [2019-11-07 00:33:18,821 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (= 6 (mod main_~x~0 4294967296)) [2019-11-07 00:33:18,822 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-07 00:33:18,822 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-07 00:33:18,822 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-07 00:33:18,822 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-07 00:33:18,823 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-07 00:33:18,823 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-07 00:33:18,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:33:18 BoogieIcfgContainer [2019-11-07 00:33:18,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:33:18,839 INFO L168 Benchmark]: Toolchain (without parser) took 1990.33 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 102.4 MB in the beginning and 105.1 MB in the end (delta: -2.7 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2019-11-07 00:33:18,840 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-07 00:33:18,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.70 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-11-07 00:33:18,842 INFO L168 Benchmark]: Boogie Preprocessor took 113.83 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.5 MB in the beginning and 180.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-11-07 00:33:18,843 INFO L168 Benchmark]: RCFGBuilder took 227.35 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 169.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:33:18,844 INFO L168 Benchmark]: TraceAbstraction took 1275.56 ms. Allocated memory is still 201.9 MB. Free memory was 169.2 MB in the beginning and 105.1 MB in the end (delta: 64.1 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:33:18,848 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 137.4 MB. Free memory was 120.6 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.70 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.83 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.5 MB in the beginning and 180.1 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 227.35 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 169.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1275.56 ms. Allocated memory is still 201.9 MB. Free memory was 169.2 MB in the beginning and 105.1 MB in the end (delta: 64.1 MB). Peak memory consumption was 64.1 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 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: x % 4294967296 < 6 || 6 == x % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 2 SDslu, 50 SDs, 0 SdLazy, 29 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1055 SizeOfPredicates, 0 NumberOfNonLiveVariables, 29 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...