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/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:34:23,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:34:23,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:34:23,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:34:23,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-03 02:34:23,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-03 02:34:23,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-03 02:34:23,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-03 02:34:23,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-03 02:34:23,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-03 02:34:23,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-03 02:34:23,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-03 02:34:23,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-03 02:34:23,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-03 02:34:23,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-03 02:34:23,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-03 02:34:23,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-03 02:34:23,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-03 02:34:23,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-03 02:34:23,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-03 02:34:23,874 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 02:34:23,891 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:34:23,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:34:23,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:34:23,892 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:34:23,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:34:23,892 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:34:23,893 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:34:23,893 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:34:23,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:34:23,893 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:34:23,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:34:23,894 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:34:23,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:34:23,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:34:23,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:34:23,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:34:23,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:34:23,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:34:23,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:34:23,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:34:23,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:34:23,896 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:34:23,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:34:23,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:34:23,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:34:23,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:34:23,897 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:34:23,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:34:23,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:34:23,897 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:34:23,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:34:23,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:34:23,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:34:23,964 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:34:23,964 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:34:23,965 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-10-03 02:34:24,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44cf0e64/a9eb929967c44bad81c9bea92c368aae/FLAG00eb900af [2019-10-03 02:34:24,486 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:34:24,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2019-10-03 02:34:24,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44cf0e64/a9eb929967c44bad81c9bea92c368aae/FLAG00eb900af [2019-10-03 02:34:24,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44cf0e64/a9eb929967c44bad81c9bea92c368aae [2019-10-03 02:34:24,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:34:24,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:34:24,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:34:24,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:34:24,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:34:24,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:34:24" (1/1) ... [2019-10-03 02:34:24,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573a9846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:24, skipping insertion in model container [2019-10-03 02:34:24,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:34:24" (1/1) ... [2019-10-03 02:34:24,881 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:34:24,900 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:34:25,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:34:25,070 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:34:25,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:34:25,100 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:34:25,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25 WrapperNode [2019-10-03 02:34:25,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:34:25,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:34:25,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:34:25,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:34:25,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (1/1) ... [2019-10-03 02:34:25,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:34:25,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:34:25,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:34:25,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:34:25,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (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 02:34:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:34:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:34:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:34:25,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:34:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:34:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:34:25,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:34:25,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:34:25,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:34:25,518 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:34:25,518 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-03 02:34:25,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:34:25 BoogieIcfgContainer [2019-10-03 02:34:25,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:34:25,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:34:25,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:34:25,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:34:25,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:34:24" (1/3) ... [2019-10-03 02:34:25,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6e18e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:34:25, skipping insertion in model container [2019-10-03 02:34:25,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:34:25" (2/3) ... [2019-10-03 02:34:25,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6e18e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:34:25, skipping insertion in model container [2019-10-03 02:34:25,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:34:25" (3/3) ... [2019-10-03 02:34:25,527 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2019-10-03 02:34:25,535 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:34:25,541 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:34:25,557 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:34:25,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:34:25,585 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:34:25,585 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:34:25,585 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:34:25,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:34:25,586 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:34:25,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:34:25,586 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:34:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-03 02:34:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-03 02:34:25,607 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:25,608 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:25,610 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -84144223, now seen corresponding path program 1 times [2019-10-03 02:34:25,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:25,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:25,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:25,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:25,665 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:25,740 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 02:34:25,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:34:25,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:34:25,742 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:34:25,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:34:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:34:25,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:34:25,760 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-10-03 02:34:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:25,779 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-03 02:34:25,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:34:25,781 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-10-03 02:34:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:25,790 INFO L225 Difference]: With dead ends: 26 [2019-10-03 02:34:25,791 INFO L226 Difference]: Without dead ends: 22 [2019-10-03 02:34:25,793 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:34:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-03 02:34:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-03 02:34:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-03 02:34:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-03 02:34:25,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-10-03 02:34:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:25,825 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-03 02:34:25,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:34:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-03 02:34:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-03 02:34:25,826 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:25,826 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:25,827 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash -89685349, now seen corresponding path program 1 times [2019-10-03 02:34:25,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:25,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:25,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:25,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:25,830 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:25,962 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 02:34:25,963 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:34:25,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-03 02:34:25,967 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:34:25,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-03 02:34:25,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-03 02:34:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:34:25,974 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-10-03 02:34:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:26,033 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-10-03 02:34:26,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-03 02:34:26,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-03 02:34:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:26,035 INFO L225 Difference]: With dead ends: 31 [2019-10-03 02:34:26,035 INFO L226 Difference]: Without dead ends: 31 [2019-10-03 02:34:26,037 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:34:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-03 02:34:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-10-03 02:34:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-03 02:34:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-03 02:34:26,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-10-03 02:34:26,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:26,046 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-03 02:34:26,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-03 02:34:26,046 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-03 02:34:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-03 02:34:26,053 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:26,054 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:26,054 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash 374245081, now seen corresponding path program 1 times [2019-10-03 02:34:26,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:26,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:26,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:26,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:26,057 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:26,207 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 02:34:26,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:26,211 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:34:26,212 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-10-03 02:34:26,214 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [20], [28], [36], [42], [44], [46], [69], [72], [74], [80], [81], [82], [84] [2019-10-03 02:34:26,245 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:34:26,245 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:34:26,309 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-03 02:34:26,625 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:34:26,630 INFO L272 AbstractInterpreter]: Visited 16 different actions 72 times. Merged at 3 different actions 24 times. Widened at 1 different actions 6 times. Performed 108 root evaluator evaluations with a maximum evaluation depth of 12. Performed 108 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-10-03 02:34:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:26,656 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:34:26,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:26,656 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:34:26,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:26,698 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:26,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-03 02:34:26,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:26,804 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 02:34:26,805 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:26,852 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 02:34:26,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:34:26,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-10-03 02:34:26,859 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:26,859 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:34:26,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:34:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:34:26,863 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-10-03 02:34:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:26,912 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-03 02:34:26,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-03 02:34:26,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-03 02:34:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:26,915 INFO L225 Difference]: With dead ends: 33 [2019-10-03 02:34:26,916 INFO L226 Difference]: Without dead ends: 33 [2019-10-03 02:34:26,916 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:34:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-03 02:34:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2019-10-03 02:34:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-03 02:34:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-03 02:34:26,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2019-10-03 02:34:26,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:26,926 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-03 02:34:26,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:34:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-03 02:34:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-03 02:34:26,928 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:26,928 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:26,929 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash -465210473, now seen corresponding path program 2 times [2019-10-03 02:34:26,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:26,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:26,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:26,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:26,934 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:27,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:34:27,095 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:27,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:27,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:27,096 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 02:34:27,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-03 02:34:27,119 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-10-03 02:34:27,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-03 02:34:27,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:27,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-03 02:34:27,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,169 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:34:27,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-10-03 02:34:27,242 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:27,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:34:27,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:34:27,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:34:27,244 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-10-03 02:34:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:27,296 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-10-03 02:34:27,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:34:27,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-03 02:34:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:27,298 INFO L225 Difference]: With dead ends: 35 [2019-10-03 02:34:27,298 INFO L226 Difference]: Without dead ends: 35 [2019-10-03 02:34:27,298 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-03 02:34:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-03 02:34:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2019-10-03 02:34:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-03 02:34:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-03 02:34:27,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2019-10-03 02:34:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:27,304 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-03 02:34:27,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:34:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-03 02:34:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-03 02:34:27,305 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:27,305 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:27,305 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash 271853781, now seen corresponding path program 3 times [2019-10-03 02:34:27,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:27,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:27,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:27,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:27,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:27,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:34:27,414 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:27,414 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:27,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:27,415 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:34:27,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-03 02:34:27,435 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:27,452 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-03 02:34:27,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:27,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-03 02:34:27,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,478 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:34:27,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2019-10-03 02:34:27,573 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:27,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-03 02:34:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-03 02:34:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:34:27,574 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2019-10-03 02:34:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:27,647 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-10-03 02:34:27,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:34:27,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-03 02:34:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:27,649 INFO L225 Difference]: With dead ends: 37 [2019-10-03 02:34:27,650 INFO L226 Difference]: Without dead ends: 37 [2019-10-03 02:34:27,650 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-10-03 02:34:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-03 02:34:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-10-03 02:34:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-03 02:34:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-03 02:34:27,660 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-10-03 02:34:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:27,660 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-03 02:34:27,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-03 02:34:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-03 02:34:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-03 02:34:27,662 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:27,663 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:27,663 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:27,663 INFO L82 PathProgramCache]: Analyzing trace with hash -79001965, now seen corresponding path program 4 times [2019-10-03 02:34:27,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:27,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:27,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-03 02:34:27,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:27,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:27,816 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:34:27,816 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:27,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:27,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:27,816 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) [2019-10-03 02:34:27,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:27,839 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:27,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-03 02:34:27,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:27,897 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:28,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:34:28,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-10-03 02:34:28,016 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:34:28,017 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-03 02:34:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-03 02:34:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:34:28,018 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-03 02:34:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:28,094 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-03 02:34:28,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:34:28,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-10-03 02:34:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:28,096 INFO L225 Difference]: With dead ends: 39 [2019-10-03 02:34:28,096 INFO L226 Difference]: Without dead ends: 39 [2019-10-03 02:34:28,097 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-10-03 02:34:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-03 02:34:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-10-03 02:34:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-03 02:34:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-03 02:34:28,102 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2019-10-03 02:34:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:28,102 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-03 02:34:28,102 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-03 02:34:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-03 02:34:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-03 02:34:28,103 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:34:28,104 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:34:28,104 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:34:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:34:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2051042513, now seen corresponding path program 5 times [2019-10-03 02:34:28,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:34:28,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:28,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:34:28,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:34:28,107 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:34:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:34:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:34:28,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:28,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:34:28,259 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:34:28,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:34:28,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:34:28,260 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:34:28,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-03 02:34:28,282 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:34:28,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-03 02:34:28,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:34:28,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-03 02:34:28,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:34:28,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:28,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:28,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:28,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:28,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:34:31,940 WARN L191 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2019-10-03 02:34:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-03 02:34:32,258 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:34:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-03 02:34:36,659 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-03 02:34:36,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [8] total 18 [2019-10-03 02:34:36,660 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:34:36,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-03 02:34:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-03 02:34:36,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-10-03 02:34:36,661 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-10-03 02:34:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:34:37,301 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-10-03 02:34:37,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-03 02:34:37,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-10-03 02:34:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:34:37,311 INFO L225 Difference]: With dead ends: 36 [2019-10-03 02:34:37,311 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:34:37,311 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=90, Invalid=288, Unknown=2, NotChecked=0, Total=380 [2019-10-03 02:34:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:34:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:34:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:34:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:34:37,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-10-03 02:34:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:34:37,312 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:34:37,312 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-03 02:34:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:34:37,313 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:34:37,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:34:37 BoogieIcfgContainer [2019-10-03 02:34:37,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:34:37,321 INFO L168 Benchmark]: Toolchain (without parser) took 12456.69 ms. Allocated memory was 133.7 MB in the beginning and 256.9 MB in the end (delta: 123.2 MB). Free memory was 88.8 MB in the beginning and 161.7 MB in the end (delta: -73.0 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:37,322 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:34:37,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.25 ms. Allocated memory is still 133.7 MB. Free memory was 88.6 MB in the beginning and 78.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:37,323 INFO L168 Benchmark]: Boogie Preprocessor took 124.47 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 78.6 MB in the beginning and 176.8 MB in the end (delta: -98.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:37,324 INFO L168 Benchmark]: RCFGBuilder took 293.20 ms. Allocated memory is still 200.3 MB. Free memory was 176.2 MB in the beginning and 162.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:37,325 INFO L168 Benchmark]: TraceAbstraction took 11797.85 ms. Allocated memory was 200.3 MB in the beginning and 256.9 MB in the end (delta: 56.6 MB). Free memory was 162.8 MB in the beginning and 161.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2019-10-03 02:34:37,329 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.25 ms. Allocated memory is still 133.7 MB. Free memory was 88.6 MB in the beginning and 78.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.47 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 78.6 MB in the beginning and 176.8 MB in the end (delta: -98.2 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 293.20 ms. Allocated memory is still 200.3 MB. Free memory was 176.2 MB in the beginning and 162.8 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11797.85 ms. Allocated memory was 200.3 MB in the beginning and 256.9 MB in the end (delta: 56.6 MB). Free memory was 162.8 MB in the beginning and 161.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 11.7s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 178 SDtfs, 87 SDslu, 486 SDs, 0 SdLazy, 202 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 177 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 228 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 311 ConstructedInterpolants, 2 QuantifiedInterpolants, 18538 SizeOfPredicates, 7 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 50/165 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...