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-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:52:21,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:52:21,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:52:21,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:52:21,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 20:52:21,949 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:52:21,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:52:21,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:52:21,950 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:52:21,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:52:21,951 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:52:21,951 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:52:21,951 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:52:21,951 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:52:21,952 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:52:21,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:52:21,953 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:52:21,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:52:21,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:52:21,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:52:21,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:52:21,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:52:21,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:52:21,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:52:21,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:52:21,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:52:21,954 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:52:21,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:52:21,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:52:21,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:52:21,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:52:21,955 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:52:21,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:52:21,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:52:21,956 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:52:21,985 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:52:21,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:52:22,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:52:22,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:52:22,003 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:52:22,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2019-09-03 20:52:22,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b158fb82/9702bd0f26034990b353880d203c9990/FLAG06ed33c29 [2019-09-03 20:52:22,506 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:52:22,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2019-09-03 20:52:22,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b158fb82/9702bd0f26034990b353880d203c9990/FLAG06ed33c29 [2019-09-03 20:52:22,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b158fb82/9702bd0f26034990b353880d203c9990 [2019-09-03 20:52:22,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:52:22,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:52:22,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:52:22,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:52:22,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:52:22,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:52:22" (1/1) ... [2019-09-03 20:52:22,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fd318c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:22, skipping insertion in model container [2019-09-03 20:52:22,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:52:22" (1/1) ... [2019-09-03 20:52:22,952 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:52:22,971 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:52:23,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:52:23,159 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:52:23,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:52:23,188 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:52:23,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23 WrapperNode [2019-09-03 20:52:23,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:52:23,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:52:23,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:52:23,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:52:23,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... [2019-09-03 20:52:23,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:52:23,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:52:23,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:52:23,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:52:23,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:52:23,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:52:23,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:52:23,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:52:23,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:52:23,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:52:23,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:52:23,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:52:23,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:52:23,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:52:23,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:52:23,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:52:23,600 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:52:23,600 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-03 20:52:23,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:52:23 BoogieIcfgContainer [2019-09-03 20:52:23,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:52:23,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:52:23,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:52:23,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:52:23,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:52:22" (1/3) ... [2019-09-03 20:52:23,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2cefc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:52:23, skipping insertion in model container [2019-09-03 20:52:23,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:23" (2/3) ... [2019-09-03 20:52:23,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2cefc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:52:23, skipping insertion in model container [2019-09-03 20:52:23,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:52:23" (3/3) ... [2019-09-03 20:52:23,634 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2019-09-03 20:52:23,660 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:52:23,670 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:52:23,690 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:52:23,725 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:52:23,725 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:52:23,725 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:52:23,725 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:52:23,726 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:52:23,726 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:52:23,726 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:52:23,726 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:52:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-03 20:52:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:52:23,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:23,755 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:23,757 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1213508388, now seen corresponding path program 1 times [2019-09-03 20:52:23,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:23,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:23,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:23,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:23,821 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:23,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:23,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:52:23,981 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:23,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:52:23,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:52:23,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:52:24,001 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2019-09-03 20:52:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:24,110 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-09-03 20:52:24,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:52:24,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-03 20:52:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:24,125 INFO L225 Difference]: With dead ends: 36 [2019-09-03 20:52:24,125 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 20:52:24,129 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:52:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 20:52:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 20:52:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 20:52:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-03 20:52:24,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2019-09-03 20:52:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:24,169 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-03 20:52:24,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:52:24,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-03 20:52:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:52:24,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:24,171 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:24,171 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:24,172 INFO L82 PathProgramCache]: Analyzing trace with hash 542305890, now seen corresponding path program 1 times [2019-09-03 20:52:24,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:24,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:24,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:24,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:24,173 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:24,280 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:24,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:52:24,280 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:24,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:52:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:52:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:52:24,284 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2019-09-03 20:52:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:24,474 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-09-03 20:52:24,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:52:24,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-09-03 20:52:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:24,476 INFO L225 Difference]: With dead ends: 38 [2019-09-03 20:52:24,477 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 20:52:24,478 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:52:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 20:52:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2019-09-03 20:52:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:52:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-03 20:52:24,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2019-09-03 20:52:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:24,491 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-03 20:52:24,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:52:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-03 20:52:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 20:52:24,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:24,493 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:24,494 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1063580357, now seen corresponding path program 1 times [2019-09-03 20:52:24,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:24,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:24,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:24,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:24,498 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:24,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:24,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:52:24,581 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:24,582 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:52:24,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:52:24,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:52:24,583 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2019-09-03 20:52:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:24,646 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-03 20:52:24,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:52:24,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-03 20:52:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:24,649 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:52:24,649 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 20:52:24,649 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:52:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 20:52:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-03 20:52:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-03 20:52:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-09-03 20:52:24,657 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2019-09-03 20:52:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:24,658 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-09-03 20:52:24,658 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:52:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-09-03 20:52:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:52:24,659 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:24,660 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:24,660 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1462671860, now seen corresponding path program 1 times [2019-09-03 20:52:24,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:24,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:24,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:24,662 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:24,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:24,754 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:24,756 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2019-09-03 20:52:24,758 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [31], [34], [40], [50], [54], [64], [67], [69], [72], [74], [75], [76], [77], [81], [82], [83] [2019-09-03 20:52:24,801 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:52:24,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:52:24,928 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:52:24,929 INFO L272 AbstractInterpreter]: Visited 21 different actions 26 times. Never merged. Never widened. Performed 27 root evaluator evaluations with a maximum evaluation depth of 5. Performed 27 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Never found a fixpoint. Largest state had 8 variables. [2019-09-03 20:52:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:24,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:52:24,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:24,936 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:24,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:24,964 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:52:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:24,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:52:24,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:52:25,099 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:25,151 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:52:25,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2019-09-03 20:52:25,152 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:25,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:52:25,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:52:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:52:25,156 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2019-09-03 20:52:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:25,384 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2019-09-03 20:52:25,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:52:25,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-03 20:52:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:25,387 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:52:25,387 INFO L226 Difference]: Without dead ends: 71 [2019-09-03 20:52:25,387 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:52:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-03 20:52:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2019-09-03 20:52:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 20:52:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-09-03 20:52:25,397 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2019-09-03 20:52:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:25,397 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-09-03 20:52:25,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:52:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-09-03 20:52:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:52:25,398 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:25,399 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:25,399 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1830678608, now seen corresponding path program 1 times [2019-09-03 20:52:25,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:25,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:25,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:25,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:25,401 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:52:25,462 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:25,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:52:25,462 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:25,463 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:52:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:52:25,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:52:25,465 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 6 states. [2019-09-03 20:52:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:25,542 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-09-03 20:52:25,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:52:25,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-03 20:52:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:25,544 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:52:25,544 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 20:52:25,544 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:52:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 20:52:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2019-09-03 20:52:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:52:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-09-03 20:52:25,550 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 31 [2019-09-03 20:52:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:25,551 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-09-03 20:52:25,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:52:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-09-03 20:52:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 20:52:25,553 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:25,553 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:25,553 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1001212255, now seen corresponding path program 2 times [2019-09-03 20:52:25,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:25,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:25,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:25,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:25,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:52:25,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:25,640 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:25,640 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:52:25,640 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:52:25,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:25,641 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) [2019-09-03 20:52:25,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:52:25,669 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:25,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:52:25,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:52:25,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-03 20:52:25,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-03 20:52:25,758 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:52:25,810 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:52:25,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2019-09-03 20:52:25,811 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:25,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:52:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:52:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:52:25,812 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2019-09-03 20:52:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:25,934 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2019-09-03 20:52:25,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:52:25,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-09-03 20:52:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:25,936 INFO L225 Difference]: With dead ends: 54 [2019-09-03 20:52:25,936 INFO L226 Difference]: Without dead ends: 54 [2019-09-03 20:52:25,936 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:52:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-03 20:52:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-09-03 20:52:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 20:52:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-09-03 20:52:25,942 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 35 [2019-09-03 20:52:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:25,942 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-09-03 20:52:25,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:52:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-09-03 20:52:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-03 20:52:25,944 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:25,944 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:25,944 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash -118477279, now seen corresponding path program 1 times [2019-09-03 20:52:25,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:25,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:52:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:25,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:52:26,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:26,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:26,010 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2019-09-03 20:52:26,011 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [29], [31], [34], [40], [42], [45], [50], [54], [58], [64], [67], [69], [72], [74], [75], [76], [77], [79], [80], [81], [82], [83] [2019-09-03 20:52:26,014 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:52:26,014 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:52:26,283 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:52:26,286 INFO L272 AbstractInterpreter]: Visited 28 different actions 254 times. Merged at 12 different actions 74 times. Widened at 4 different actions 11 times. Performed 397 root evaluator evaluations with a maximum evaluation depth of 5. Performed 397 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 17 fixpoints after 5 different actions. Largest state had 10 variables. [2019-09-03 20:52:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:26,287 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:52:26,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:26,287 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:26,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:26,300 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:52:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:26,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:52:26,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:52:26,327 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:52:26,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:52:26,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2019-09-03 20:52:26,372 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:52:26,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:52:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:52:26,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:52:26,373 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2019-09-03 20:52:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:26,456 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2019-09-03 20:52:26,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:52:26,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-09-03 20:52:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:26,457 INFO L225 Difference]: With dead ends: 61 [2019-09-03 20:52:26,458 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 20:52:26,458 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:52:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 20:52:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2019-09-03 20:52:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-03 20:52:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-09-03 20:52:26,464 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 38 [2019-09-03 20:52:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:26,465 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-09-03 20:52:26,465 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:52:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-09-03 20:52:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 20:52:26,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:26,467 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:26,467 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:26,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1032911483, now seen corresponding path program 1 times [2019-09-03 20:52:26,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:26,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:26,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,470 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-03 20:52:26,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:26,575 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:26,576 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2019-09-03 20:52:26,576 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [23], [29], [31], [34], [40], [50], [54], [58], [64], [67], [69], [72], [74], [75], [76], [77], [81], [82], [83], [84] [2019-09-03 20:52:26,578 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:52:26,578 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:52:26,645 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:52:26,645 INFO L272 AbstractInterpreter]: Visited 25 different actions 122 times. Merged at 10 different actions 35 times. Widened at 1 different actions 3 times. Performed 204 root evaluator evaluations with a maximum evaluation depth of 5. Performed 204 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 9 fixpoints after 4 different actions. Largest state had 9 variables. [2019-09-03 20:52:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:26,646 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:52:26,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:26,646 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:26,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:26,672 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:52:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:26,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-03 20:52:26,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-03 20:52:26,704 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-03 20:52:26,738 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:52:26,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 6 [2019-09-03 20:52:26,738 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:26,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 20:52:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 20:52:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:52:26,739 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2019-09-03 20:52:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:26,782 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-09-03 20:52:26,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:52:26,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-09-03 20:52:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:26,783 INFO L225 Difference]: With dead ends: 40 [2019-09-03 20:52:26,783 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:52:26,783 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:52:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:52:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:52:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:52:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:52:26,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2019-09-03 20:52:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:26,786 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:52:26,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 20:52:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:52:26,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:52:26,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:52:26 BoogieIcfgContainer [2019-09-03 20:52:26,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:52:26,793 INFO L168 Benchmark]: Toolchain (without parser) took 3865.84 ms. Allocated memory was 141.0 MB in the beginning and 257.9 MB in the end (delta: 116.9 MB). Free memory was 88.6 MB in the beginning and 204.0 MB in the end (delta: -115.3 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:26,794 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:52:26,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.72 ms. Allocated memory is still 141.0 MB. Free memory was 88.4 MB in the beginning and 78.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:26,796 INFO L168 Benchmark]: Boogie Preprocessor took 125.12 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 78.7 MB in the beginning and 178.4 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:26,797 INFO L168 Benchmark]: RCFGBuilder took 294.33 ms. Allocated memory is still 200.8 MB. Free memory was 178.4 MB in the beginning and 164.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:26,798 INFO L168 Benchmark]: TraceAbstraction took 3180.51 ms. Allocated memory was 200.8 MB in the beginning and 257.9 MB in the end (delta: 57.1 MB). Free memory was 164.7 MB in the beginning and 204.0 MB in the end (delta: -39.2 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:26,801 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 141.0 MB. Free memory was 107.2 MB in the beginning and 107.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.72 ms. Allocated memory is still 141.0 MB. Free memory was 88.4 MB in the beginning and 78.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.12 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 78.7 MB in the beginning and 178.4 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.33 ms. Allocated memory is still 200.8 MB. Free memory was 178.4 MB in the beginning and 164.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3180.51 ms. Allocated memory was 200.8 MB in the beginning and 257.9 MB in the end (delta: 57.1 MB). Free memory was 164.7 MB in the beginning and 204.0 MB in the end (delta: -39.2 MB). Peak memory consumption was 17.9 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, 29 locations, 1 error locations. SAFE Result, 3.0s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 217 SDtfs, 87 SDslu, 477 SDs, 0 SdLazy, 317 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 330 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 51 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 356 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 477 ConstructedInterpolants, 1 QuantifiedInterpolants, 25391 SizeOfPredicates, 19 NumberOfNonLiveVariables, 290 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 16 InterpolantComputations, 10 PerfectInterpolantSequences, 231/238 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...