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+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:12:07,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:12:07,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:12:07,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 02:12:07,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 02:12:07,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 02:12:07,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 02:12:07,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 02:12:07,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 02:12:07,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 02:12:07,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 02:12:07,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 02:12:07,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 02:12:07,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 02:12:07,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 02:12:07,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 02:12:07,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 02:12:07,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 02:12:07,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 02:12:07,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 02:12:07,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 02:12:07,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 02:12:07,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 02:12:07,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 02:12:07,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-10 02:12:07,947 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 02:12:07,972 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:12:07,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:12:07,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:12:07,973 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:12:07,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:12:07,975 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:12:07,975 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:12:07,975 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:12:07,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:12:07,975 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:12:07,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:12:07,978 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:12:07,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:12:07,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:12:07,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:12:07,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:12:07,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:12:07,979 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:12:07,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:12:07,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:12:07,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:12:07,980 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:12:07,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:12:07,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:12:07,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:12:07,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:12:07,981 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:12:07,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:12:07,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:12:07,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:12:08,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:12:08,037 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:12:08,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:12:08,042 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:12:08,043 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:12:08,043 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-10 02:12:08,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0dfa61a7/c5d95c10fa2f442f9bb4ef2721e5717a/FLAGe24569748 [2019-09-10 02:12:08,571 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:12:08,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-09-10 02:12:08,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0dfa61a7/c5d95c10fa2f442f9bb4ef2721e5717a/FLAGe24569748 [2019-09-10 02:12:08,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0dfa61a7/c5d95c10fa2f442f9bb4ef2721e5717a [2019-09-10 02:12:09,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:12:09,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:12:09,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:12:09,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:12:09,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:12:09,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c69540a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09, skipping insertion in model container [2019-09-10 02:12:09,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,025 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:12:09,043 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:12:09,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:12:09,195 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:12:09,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:12:09,222 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:12:09,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09 WrapperNode [2019-09-10 02:12:09,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:12:09,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:12:09,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:12:09,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:12:09,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (1/1) ... [2019-09-10 02:12:09,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:12:09,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:12:09,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:12:09,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:12:09,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (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 02:12:09,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:12:09,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:12:09,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:12:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:12:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:12:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:12:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:12:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:12:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:12:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:12:09,542 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:12:09,542 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 02:12:09,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:12:09 BoogieIcfgContainer [2019-09-10 02:12:09,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:12:09,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:12:09,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:12:09,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:12:09,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:12:09" (1/3) ... [2019-09-10 02:12:09,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52357955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:12:09, skipping insertion in model container [2019-09-10 02:12:09,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:09" (2/3) ... [2019-09-10 02:12:09,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52357955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:12:09, skipping insertion in model container [2019-09-10 02:12:09,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:12:09" (3/3) ... [2019-09-10 02:12:09,551 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-09-10 02:12:09,558 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:12:09,565 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:12:09,581 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:12:09,607 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:12:09,608 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:12:09,608 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:12:09,608 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:12:09,608 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:12:09,608 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:12:09,608 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:12:09,609 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:12:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-10 02:12:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 02:12:09,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:09,632 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:09,633 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-10 02:12:09,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:09,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:09,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:09,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:09,676 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:09,713 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:09,713 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:09,713 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 02:12:09,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:09,734 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:09,753 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 02:12:09,755 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:09,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:09,756 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 02:12:09,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:09,787 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:12:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:09,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-10 02:12:09,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:09,916 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 02:12:09,916 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:09,956 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 02:12:09,960 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:12:09,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-09-10 02:12:09,960 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:12:09,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 02:12:09,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 02:12:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:12:09,984 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-10 02:12:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:10,026 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-09-10 02:12:10,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 02:12:10,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-10 02:12:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:10,043 INFO L225 Difference]: With dead ends: 19 [2019-09-10 02:12:10,043 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 02:12:10,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:12:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 02:12:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 02:12:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 02:12:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 02:12:10,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-10 02:12:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:10,079 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 02:12:10,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 02:12:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 02:12:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 02:12:10,080 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:10,081 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:10,081 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:10,082 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-10 02:12:10,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:10,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:10,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:10,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:10,084 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:10,093 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:10,094 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:10,094 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 02:12:10,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:10,114 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:10,140 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2019-09-10 02:12:10,142 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [19], [22], [23], [27], [28], [29] [2019-09-10 02:12:10,171 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:12:10,172 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:12:10,312 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:12:10,315 INFO L272 AbstractInterpreter]: Visited 12 different actions 34 times. Merged at 4 different actions 21 times. Widened at 1 different actions 3 times. Performed 92 root evaluator evaluations with a maximum evaluation depth of 6. Performed 92 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 02:12:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:10,319 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:12:10,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:10,319 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 02:12:10,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:10,339 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:12:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:10,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-10 02:12:10,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:10,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:10,426 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 02:12:10,427 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:10,554 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 02:12:10,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:10,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-10 02:12:10,559 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:10,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-10 02:12:10,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-10 02:12:10,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-10 02:12:10,563 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-09-10 02:12:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:10,657 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 02:12:10,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:12:10,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-09-10 02:12:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:10,659 INFO L225 Difference]: With dead ends: 15 [2019-09-10 02:12:10,660 INFO L226 Difference]: Without dead ends: 14 [2019-09-10 02:12:10,661 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:12:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-10 02:12:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-10 02:12:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 02:12:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 02:12:10,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-10 02:12:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:10,667 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 02:12:10,667 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-10 02:12:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 02:12:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 02:12:10,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:10,669 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:10,669 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-10 02:12:10,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:10,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:10,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:10,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:10,675 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:10,705 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:10,705 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:10,706 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 02:12:10,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:12:10,720 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:10,735 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:12:10,736 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:10,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:10,736 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 02:12:10,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:12:10,758 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:10,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 02:12:10,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:12:10,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-10 02:12:10,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:10,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:10,852 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:10,983 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 02:12:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-09-10 02:12:11,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:11,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-10 02:12:11,001 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:11,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-10 02:12:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-10 02:12:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2019-09-10 02:12:11,002 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-09-10 02:12:11,148 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~main__n~0 Int)) (or (< c_main_~main__i~0 main_~main__n~0) (= (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0)) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 c_main_~main__i~0))) (or (<= c_main_~main__i~0 c_main_~main__n~0) (= (* 2 c_main_~main__sum~0) (* (+ c_main_~main__n~0 1) c_main_~main__n~0)))) is different from true [2019-09-10 02:12:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:11,301 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-10 02:12:11,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-10 02:12:11,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-09-10 02:12:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:11,302 INFO L225 Difference]: With dead ends: 20 [2019-09-10 02:12:11,302 INFO L226 Difference]: Without dead ends: 17 [2019-09-10 02:12:11,303 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=115, Unknown=2, NotChecked=46, Total=210 [2019-09-10 02:12:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-10 02:12:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-10 02:12:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-10 02:12:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-10 02:12:11,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2019-09-10 02:12:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:11,307 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-10 02:12:11,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-10 02:12:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-10 02:12:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 02:12:11,308 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:11,308 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:11,308 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 3 times [2019-09-10 02:12:11,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:11,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:11,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:12:11,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:11,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:11,320 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:11,320 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:11,320 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:11,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:12:11,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:11,345 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:12:11,345 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:11,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:11,345 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:11,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 02:12:11,362 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-10 02:12:11,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 02:12:11,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:12:11,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-10 02:12:11,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:11,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:11,515 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:13,735 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 02:12:13,753 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (let ((.cse0 (+ c_main_~main__i~0 2))) (or (= (+ (* 2 c_main_~main__sum~0) (* 6 c_main_~main__i~0) 6) (* (+ 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 02:12:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2019-09-10 02:12:13,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:13,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-09-10 02:12:13,915 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:13,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-10 02:12:13,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-10 02:12:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=105, Unknown=3, NotChecked=42, Total=182 [2019-09-10 02:12:13,917 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2019-09-10 02:12:14,316 WARN L860 $PredicateComparison]: unable to prove that (and (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)))) (<= c_main_~main__i~0 6) (forall ((main_~main__n~0 Int)) (or (< c_main_~main__i~0 main_~main__n~0) (= (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0)) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 c_main_~main__i~0))) (= c_main_~main__sum~0 15) (forall ((main_~main__n~0 Int)) (let ((.cse1 (+ c_main_~main__i~0 2))) (or (= (+ (* 2 c_main_~main__sum~0) (* 6 c_main_~main__i~0) 6) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 .cse1) (< .cse1 main_~main__n~0)))) (<= 5 c_main_~main__n~0)) is different from true [2019-09-10 02:12:20,705 WARN L188 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2019-09-10 02:12:20,770 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~__VERIFIER_assert__cond~0 1) (forall ((main_~main__n~0 Int)) (or (< c_main_~main__i~0 main_~main__n~0) (= (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0)) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 c_main_~main__i~0))) (or (<= c_main_~main__i~0 c_main_~main__n~0) (= (* 2 c_main_~main__sum~0) (* (+ c_main_~main__n~0 1) c_main_~main__n~0)))) is different from true [2019-09-10 02:12:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:20,771 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-10 02:12:20,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-10 02:12:20,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-09-10 02:12:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:20,772 INFO L225 Difference]: With dead ends: 17 [2019-09-10 02:12:20,772 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:12:20,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=64, Invalid=218, Unknown=6, NotChecked=132, Total=420 [2019-09-10 02:12:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:12:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:12:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:12:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:12:20,773 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-10 02:12:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:20,774 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:12:20,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-10 02:12:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:12:20,774 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:12:20,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:12:20 BoogieIcfgContainer [2019-09-10 02:12:20,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:12:20,780 INFO L168 Benchmark]: Toolchain (without parser) took 11769.91 ms. Allocated memory was 134.7 MB in the beginning and 229.1 MB in the end (delta: 94.4 MB). Free memory was 89.6 MB in the beginning and 107.7 MB in the end (delta: -18.1 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:20,781 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 134.7 MB. Free memory was 108.0 MB in the beginning and 107.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:12:20,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.09 ms. Allocated memory is still 134.7 MB. Free memory was 89.4 MB in the beginning and 80.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:20,782 INFO L168 Benchmark]: Boogie Preprocessor took 109.65 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 80.2 MB in the beginning and 177.9 MB in the end (delta: -97.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:20,783 INFO L168 Benchmark]: RCFGBuilder took 210.30 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 166.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:20,784 INFO L168 Benchmark]: TraceAbstraction took 11233.40 ms. Allocated memory was 200.8 MB in the beginning and 229.1 MB in the end (delta: 28.3 MB). Free memory was 165.5 MB in the beginning and 107.7 MB in the end (delta: 57.8 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:20,788 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 134.7 MB. Free memory was 108.0 MB in the beginning and 107.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 213.09 ms. Allocated memory is still 134.7 MB. Free memory was 89.4 MB in the beginning and 80.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.65 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 80.2 MB in the beginning and 177.9 MB in the end (delta: -97.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 210.30 ms. Allocated memory is still 200.8 MB. Free memory was 177.9 MB in the beginning and 166.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11233.40 ms. Allocated memory was 200.8 MB in the beginning and 229.1 MB in the end (delta: 28.3 MB). Free memory was 165.5 MB in the beginning and 107.7 MB in the end (delta: 57.8 MB). Peak memory consumption was 86.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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, 16 locations, 1 error locations. SAFE Result, 11.1s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 7.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 25 SDslu, 137 SDs, 0 SdLazy, 125 SolverSat, 11 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 96 ConstructedInterpolants, 7 QuantifiedInterpolants, 5479 SizeOfPredicates, 20 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 3/38 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...