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/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:12:15,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:12:15,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:12:15,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:12:15,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:12:15,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:12:15,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:12:15,830 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 [2019-09-10 02:12:15,858 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:12:15,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:12:15,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:12:15,860 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:12:15,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:12:15,861 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:12:15,861 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:12:15,861 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:12:15,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:12:15,862 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:12:15,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:12:15,864 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:12:15,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:12:15,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:12:15,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:12:15,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:12:15,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:12:15,866 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:12:15,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:12:15,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:12:15,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:12:15,867 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:12:15,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:12:15,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:12:15,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:12:15,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:12:15,868 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:12:15,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:12:15,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:12:15,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:12:15,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:12:15,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:12:15,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:12:15,939 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:12:15,940 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:12:15,941 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-09-10 02:12:16,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e241d37f9/88d1c42affa4446b8a33e970ff6d6434/FLAG65bde3921 [2019-09-10 02:12:16,441 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:12:16,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-09-10 02:12:16,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e241d37f9/88d1c42affa4446b8a33e970ff6d6434/FLAG65bde3921 [2019-09-10 02:12:16,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e241d37f9/88d1c42affa4446b8a33e970ff6d6434 [2019-09-10 02:12:16,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:12:16,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:12:16,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:12:16,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:12:16,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:12:16,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:12:16" (1/1) ... [2019-09-10 02:12:16,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5827f7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:16, skipping insertion in model container [2019-09-10 02:12:16,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:12:16" (1/1) ... [2019-09-10 02:12:16,854 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:12:16,880 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:12:17,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:12:17,070 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:12:17,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:12:17,102 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:12:17,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17 WrapperNode [2019-09-10 02:12:17,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:12:17,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:12:17,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:12:17,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:12:17,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (1/1) ... [2019-09-10 02:12:17,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:12:17,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:12:17,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:12:17,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:12:17,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (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 [2019-09-10 02:12:17,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:12:17,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:12:17,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:12:17,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:12:17,511 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:12:17,511 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 02:12:17,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:12:17 BoogieIcfgContainer [2019-09-10 02:12:17,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:12:17,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:12:17,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:12:17,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:12:17,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:12:16" (1/3) ... [2019-09-10 02:12:17,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4182eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:12:17, skipping insertion in model container [2019-09-10 02:12:17,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:17" (2/3) ... [2019-09-10 02:12:17,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4182eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:12:17, skipping insertion in model container [2019-09-10 02:12:17,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:12:17" (3/3) ... [2019-09-10 02:12:17,537 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-09-10 02:12:17,558 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:12:17,570 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:12:17,593 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:12:17,625 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:12:17,626 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:12:17,626 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:12:17,626 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:12:17,626 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:12:17,626 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:12:17,626 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:12:17,627 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:12:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-10 02:12:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 02:12:17,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:17,653 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:17,656 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1720236422, now seen corresponding path program 1 times [2019-09-10 02:12:17,666 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:17,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:17,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:17,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:17,735 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:17,779 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:17,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:17,780 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:17,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:17,793 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:17,819 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 02:12:17,821 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:17,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:17,822 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:17,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:17,834 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:12:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:17,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-10 02:12:17,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:18,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:18,084 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:18,407 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (let ((.cse0 (+ c_main_~main__i~0 1))) (or (= (+ (* 2 c_main_~main__sum~0) (* 4 c_main_~main__i~0) 2) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 .cse0) (< .cse0 main_~main__n~0)))) is different from true [2019-09-10 02:12:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:22,589 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:12:22,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 14 [2019-09-10 02:12:22,590 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:12:22,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-10 02:12:22,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-10 02:12:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=4, NotChecked=22, Total=182 [2019-09-10 02:12:22,617 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-09-10 02:12:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:22,833 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-09-10 02:12:22,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:12:22,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-10 02:12:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:22,845 INFO L225 Difference]: With dead ends: 35 [2019-09-10 02:12:22,846 INFO L226 Difference]: Without dead ends: 18 [2019-09-10 02:12:22,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=4, NotChecked=24, Total=210 [2019-09-10 02:12:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-10 02:12:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-10 02:12:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-10 02:12:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-10 02:12:22,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-10 02:12:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:22,883 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-10 02:12:22,883 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-10 02:12:22,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-10 02:12:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-10 02:12:22,884 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:22,885 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:22,885 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1787659072, now seen corresponding path program 1 times [2019-09-10 02:12:22,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:22,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:22,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:22,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:22,887 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:22,901 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:22,902 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:22,902 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:22,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:22,924 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:22,939 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-10 02:12:22,942 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [16], [19], [22], [25], [28], [32], [34], [37], [38], [47], [48], [49] [2019-09-10 02:12:22,974 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:12:22,974 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:12:23,143 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:12:23,145 INFO L272 AbstractInterpreter]: Visited 17 different actions 37 times. Merged at 4 different actions 20 times. Widened at 1 different actions 3 times. Performed 99 root evaluator evaluations with a maximum evaluation depth of 6. Performed 99 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2019-09-10 02:12:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:23,149 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:12:23,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:23,149 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:23,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:23,167 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:12:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:23,187 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-10 02:12:23,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:23,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:23,318 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:27,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:27,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-09-10 02:12:27,695 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:27,696 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-10 02:12:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-10 02:12:27,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:12:27,697 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2019-09-10 02:12:30,606 WARN L188 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-10 02:12:32,835 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 21 [2019-09-10 02:12:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:32,837 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-10 02:12:32,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-10 02:12:32,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-09-10 02:12:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:32,838 INFO L225 Difference]: With dead ends: 18 [2019-09-10 02:12:32,839 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:12:32,840 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2019-09-10 02:12:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:12:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:12:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:12:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:12:32,841 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-09-10 02:12:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:32,841 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:12:32,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-10 02:12:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:12:32,842 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:12:32,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:12:32 BoogieIcfgContainer [2019-09-10 02:12:32,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:12:32,849 INFO L168 Benchmark]: Toolchain (without parser) took 16017.16 ms. Allocated memory was 137.9 MB in the beginning and 235.9 MB in the end (delta: 98.0 MB). Free memory was 94.1 MB in the beginning and 123.9 MB in the end (delta: -29.8 MB). Peak memory consumption was 68.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:32,850 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 112.2 MB in the beginning and 112.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:12:32,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.62 ms. Allocated memory is still 137.9 MB. Free memory was 93.9 MB in the beginning and 83.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:32,852 INFO L168 Benchmark]: Boogie Preprocessor took 130.19 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 83.9 MB in the beginning and 178.2 MB in the end (delta: -94.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:32,853 INFO L168 Benchmark]: RCFGBuilder took 278.74 ms. Allocated memory is still 201.3 MB. Free memory was 177.7 MB in the beginning and 165.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:32,854 INFO L168 Benchmark]: TraceAbstraction took 15333.65 ms. Allocated memory was 201.3 MB in the beginning and 235.9 MB in the end (delta: 34.6 MB). Free memory was 164.8 MB in the beginning and 123.9 MB in the end (delta: 40.9 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:32,858 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 137.9 MB. Free memory was 112.2 MB in the beginning and 112.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.62 ms. Allocated memory is still 137.9 MB. Free memory was 93.9 MB in the beginning and 83.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.19 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 83.9 MB in the beginning and 178.2 MB in the end (delta: -94.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.74 ms. Allocated memory is still 201.3 MB. Free memory was 177.7 MB in the beginning and 165.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15333.65 ms. Allocated memory was 201.3 MB in the beginning and 235.9 MB in the end (delta: 34.6 MB). Free memory was 164.8 MB in the beginning and 123.9 MB in the end (delta: 40.9 MB). Peak memory consumption was 75.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 64]: 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 3 procedures, 21 locations, 1 error locations. SAFE Result, 15.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 5.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 19 SDslu, 205 SDs, 0 SdLazy, 191 SolverSat, 9 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 62 ConstructedInterpolants, 11 QuantifiedInterpolants, 6565 SizeOfPredicates, 12 NumberOfNonLiveVariables, 135 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...