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 0.1.24-673a906-m [2019-10-03 02:34:04,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:34:04,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:34:04,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-03 02:34:04,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-03 02:34:04,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-03 02:34:04,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-03 02:34:04,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-03 02:34:04,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-03 02:34:04,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-03 02:34:04,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-03 02:34:04,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-10-03 02:34:04,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-03 02:34:04,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-03 02:34:04,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-03 02:34:04,840 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 [2019-10-03 02:34:04,856 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:34:04,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:34:04,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:34:04,857 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:34:04,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:34:04,857 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:34:04,858 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:34:04,858 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:34:04,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:34:04,858 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:34:04,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:34:04,859 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:34:04,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:34:04,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:34:04,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:34:04,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:34:04,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:34:04,861 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:34:04,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:34:04,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:34:04,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:34:04,861 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:34:04,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:34:04,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:34:04,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:34:04,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:34:04,862 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:34:04,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:34:04,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:34:04,863 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:34:04,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:34:04,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:34:04,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:34:04,911 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:34:04,912 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:34:04,912 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-03 02:34:04,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e228785a/121ff396549743aabe8a90814998d758/FLAG79e8cbcb9 [2019-10-03 02:34:05,503 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:34:05,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-03 02:34:05,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e228785a/121ff396549743aabe8a90814998d758/FLAG79e8cbcb9 [2019-10-03 02:34:05,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e228785a/121ff396549743aabe8a90814998d758 [2019-10-03 02:34:05,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:34:05,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:34:05,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:34:05,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:34:05,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:34:05,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:34:05" (1/1) ... [2019-10-03 02:34:05,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13252089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:05, skipping insertion in model container [2019-10-03 02:34:05,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:34:05" (1/1) ... [2019-10-03 02:34:05,874 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:34:05,895 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:34:06,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:34:06,089 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:34:06,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:34:06,117 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:34:06,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06 WrapperNode [2019-10-03 02:34:06,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:34:06,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:34:06,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:34:06,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:34:06,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (1/1) ... [2019-10-03 02:34:06,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:34:06,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:34:06,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:34:06,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:34:06,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (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 [2019-10-03 02:34:06,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:34:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:34:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:34:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:34:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:34:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:34:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:34:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:34:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:34:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:34:06,467 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:34:06,468 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-03 02:34:06,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:34:06 BoogieIcfgContainer [2019-10-03 02:34:06,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:34:06,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:34:06,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:34:06,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:34:06,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:34:05" (1/3) ... [2019-10-03 02:34:06,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a547281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:34:06, skipping insertion in model container [2019-10-03 02:34:06,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:06" (2/3) ... [2019-10-03 02:34:06,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a547281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:34:06, skipping insertion in model container [2019-10-03 02:34:06,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:34:06" (3/3) ... [2019-10-03 02:34:06,478 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-10-03 02:34:06,488 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:34:06,496 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:34:06,513 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:34:06,541 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:34:06,541 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:34:06,541 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:34:06,541 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:34:06,542 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:34:06,542 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:34:06,542 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:34:06,542 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:34:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-03 02:34:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-03 02:34:06,565 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:06,566 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:06,568 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-03 02:34:06,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:06,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:06,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:06,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:06,618 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:06,651 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:06,651 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:06,651 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 [2019-10-03 02:34:06,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:06,672 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:34:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:06,697 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-10-03 02:34:06,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:06,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:06,700 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 [2019-10-03 02:34:06,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:06,730 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:34:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:06,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-03 02:34:06,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:06,848 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:06,878 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:34:06,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-10-03 02:34:06,879 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:34:06,883 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-03 02:34:06,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-03 02:34:06,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:34:06,900 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-03 02:34:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:06,980 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-10-03 02:34:06,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-03 02:34:06,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-03 02:34:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:06,997 INFO L225 Difference]: With dead ends: 19 [2019-10-03 02:34:06,998 INFO L226 Difference]: Without dead ends: 13 [2019-10-03 02:34:07,001 INFO L640 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 [2019-10-03 02:34:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-03 02:34:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-03 02:34:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-03 02:34:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-03 02:34:07,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-03 02:34:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:07,052 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-03 02:34:07,052 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-03 02:34:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-03 02:34:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-03 02:34:07,054 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:07,054 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:07,055 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:07,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-03 02:34:07,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:07,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:07,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:07,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:07,061 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:07,088 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:07,089 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:07,089 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) [2019-10-03 02:34:07,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:07,112 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:07,132 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2019-10-03 02:34:07,135 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [19], [22], [23], [27], [28], [29] [2019-10-03 02:34:07,173 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:34:07,173 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:34:07,357 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:34:07,360 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. [2019-10-03 02:34:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:07,364 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:34:07,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:07,364 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 [2019-10-03 02:34:07,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:07,388 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:34:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:07,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-03 02:34:07,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:07,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:07,498 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:07,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:34:07,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-03 02:34:07,643 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:07,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-03 02:34:07,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-03 02:34:07,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:34:07,646 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-10-03 02:34:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:07,738 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-03 02:34:07,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:34:07,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-10-03 02:34:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:07,740 INFO L225 Difference]: With dead ends: 15 [2019-10-03 02:34:07,740 INFO L226 Difference]: Without dead ends: 14 [2019-10-03 02:34:07,741 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:34:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-03 02:34:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-03 02:34:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-03 02:34:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-03 02:34:07,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-03 02:34:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:07,753 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-03 02:34:07,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-03 02:34:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-03 02:34:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:34:07,757 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:07,758 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:07,758 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-03 02:34:07,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:07,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:07,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:07,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:07,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:07,782 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:07,783 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:07,783 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:07,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:07,801 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-10-03 02:34:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:07,820 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:07,820 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:07,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:07,821 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:07,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-03 02:34:07,844 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-10-03 02:34:07,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-03 02:34:07,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:07,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-03 02:34:07,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:07,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:07,920 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:08,064 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 [2019-10-03 02:34:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-10-03 02:34:08,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:34:08,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-03 02:34:08,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:08,080 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-03 02:34:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-03 02:34:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2019-10-03 02:34:08,082 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-10-03 02:34:08,235 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 [2019-10-03 02:34:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:08,396 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-03 02:34:08,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-03 02:34:08,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-10-03 02:34:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:08,398 INFO L225 Difference]: With dead ends: 20 [2019-10-03 02:34:08,398 INFO L226 Difference]: Without dead ends: 17 [2019-10-03 02:34:08,399 INFO L640 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 [2019-10-03 02:34:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-03 02:34:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-03 02:34:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-03 02:34:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-03 02:34:08,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2019-10-03 02:34:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:08,403 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-03 02:34:08,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-03 02:34:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-03 02:34:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-03 02:34:08,404 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:08,404 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:08,404 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 3 times [2019-10-03 02:34:08,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:08,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:08,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:08,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:08,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:08,419 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-03 02:34:08,420 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-03 02:34:08,420 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) [2019-10-03 02:34:08,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:08,443 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-03 02:34:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:08,457 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:08,457 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:08,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:08,457 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 [2019-10-03 02:34:08,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-03 02:34:08,483 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-10-03 02:34:08,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-03 02:34:08,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:08,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-03 02:34:08,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:08,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:08,650 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:12,973 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 [2019-10-03 02:34:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2019-10-03 02:34:14,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-03 02:34:14,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-03 02:34:14,098 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:14,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-03 02:34:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-03 02:34:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=104, Unknown=2, NotChecked=20, Total=156 [2019-10-03 02:34:14,100 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2019-10-03 02:34:16,638 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2019-10-03 02:34:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:16,803 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-03 02:34:16,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-03 02:34:16,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-10-03 02:34:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:16,804 INFO L225 Difference]: With dead ends: 17 [2019-10-03 02:34:16,804 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:34:16,805 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=81, Invalid=301, Unknown=2, NotChecked=36, Total=420 [2019-10-03 02:34:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:34:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:34:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:34:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:34:16,806 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-10-03 02:34:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:16,807 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:34:16,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-03 02:34:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:34:16,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:34:16,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:34:16 BoogieIcfgContainer [2019-10-03 02:34:16,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:34:16,815 INFO L168 Benchmark]: Toolchain (without parser) took 10961.09 ms. Allocated memory was 138.9 MB in the beginning and 221.8 MB in the end (delta: 82.8 MB). Free memory was 86.4 MB in the beginning and 86.4 MB in the end (delta: 51.0 kB). Peak memory consumption was 82.9 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:16,816 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:34:16,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.40 ms. Allocated memory is still 138.9 MB. Free memory was 86.2 MB in the beginning and 76.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:16,818 INFO L168 Benchmark]: Boogie Preprocessor took 114.76 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 76.7 MB in the beginning and 176.1 MB in the end (delta: -99.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:16,819 INFO L168 Benchmark]: RCFGBuilder took 235.98 ms. Allocated memory is still 198.7 MB. Free memory was 176.1 MB in the beginning and 165.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:16,820 INFO L168 Benchmark]: TraceAbstraction took 10342.19 ms. Allocated memory was 198.7 MB in the beginning and 221.8 MB in the end (delta: 23.1 MB). Free memory was 164.5 MB in the beginning and 86.4 MB in the end (delta: 78.1 MB). Peak memory consumption was 101.2 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:16,824 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.40 ms. Allocated memory is still 138.9 MB. Free memory was 86.2 MB in the beginning and 76.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.76 ms. Allocated memory was 138.9 MB in the beginning and 198.7 MB in the end (delta: 59.8 MB). Free memory was 76.7 MB in the beginning and 176.1 MB in the end (delta: -99.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 235.98 ms. Allocated memory is still 198.7 MB. Free memory was 176.1 MB in the beginning and 165.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10342.19 ms. Allocated memory was 198.7 MB in the beginning and 221.8 MB in the end (delta: 23.1 MB). Free memory was 164.5 MB in the beginning and 86.4 MB in the end (delta: 78.1 MB). Peak memory consumption was 101.2 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, 10.2s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 27 SDslu, 137 SDs, 0 SdLazy, 132 SolverSat, 11 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 8.6s 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, 0.2s 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, 6.0s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 96 ConstructedInterpolants, 7 QuantifiedInterpolants, 5404 SizeOfPredicates, 20 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 6/38 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...