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/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:51:52,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:51:52,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:51:52,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:51:52,851 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 20:51:52,867 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:51:52,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:51:52,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:51:52,869 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:51:52,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:51:52,869 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:51:52,870 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:51:52,870 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:51:52,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:51:52,870 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:51:52,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:51:52,871 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:51:52,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:51:52,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:51:52,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:51:52,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:51:52,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:51:52,873 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:51:52,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:51:52,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:51:52,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:51:52,874 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:51:52,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:51:52,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:51:52,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:51:52,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:51:52,875 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:51:52,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:51:52,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:51:52,876 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:51:52,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:51:52,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:51:52,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:51:52,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:51:52,950 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:51:52,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2019-09-03 20:51:53,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d50eb45/ed5b4e0938a546a3afd3dcc69080f076/FLAG421966352 [2019-09-03 20:51:53,425 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:51:53,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2019-09-03 20:51:53,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d50eb45/ed5b4e0938a546a3afd3dcc69080f076/FLAG421966352 [2019-09-03 20:51:53,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71d50eb45/ed5b4e0938a546a3afd3dcc69080f076 [2019-09-03 20:51:53,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:51:53,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:51:53,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:51:53,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:51:53,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:51:53,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:51:53" (1/1) ... [2019-09-03 20:51:53,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1abc3e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:53, skipping insertion in model container [2019-09-03 20:51:53,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:51:53" (1/1) ... [2019-09-03 20:51:53,857 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:51:53,883 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:51:54,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:51:54,066 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:51:54,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:51:54,186 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:51:54,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54 WrapperNode [2019-09-03 20:51:54,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:51:54,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:51:54,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:51:54,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:51:54,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (1/1) ... [2019-09-03 20:51:54,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:51:54,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:51:54,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:51:54,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:51:54,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (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 20:51:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:51:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:51:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:51:54,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:51:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:51:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:51:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:51:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:51:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:51:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:51:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:51:54,560 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:51:54,560 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-03 20:51:54,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:51:54 BoogieIcfgContainer [2019-09-03 20:51:54,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:51:54,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:51:54,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:51:54,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:51:54,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:51:53" (1/3) ... [2019-09-03 20:51:54,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e23cd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:51:54, skipping insertion in model container [2019-09-03 20:51:54,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:54" (2/3) ... [2019-09-03 20:51:54,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e23cd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:51:54, skipping insertion in model container [2019-09-03 20:51:54,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:51:54" (3/3) ... [2019-09-03 20:51:54,571 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2019-09-03 20:51:54,581 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:51:54,590 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:51:54,606 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:51:54,633 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:51:54,633 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:51:54,633 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:51:54,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:51:54,634 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:51:54,634 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:51:54,634 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:51:54,634 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:51:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-09-03 20:51:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:51:54,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:54,661 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:54,663 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1277279000, now seen corresponding path program 1 times [2019-09-03 20:51:54,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:54,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:54,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:54,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:54,707 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:54,851 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 20:51:54,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:54,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:51:54,853 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:54,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:51:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:51:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:51:54,873 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 5 states. [2019-09-03 20:51:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:55,137 INFO L93 Difference]: Finished difference Result 71 states and 111 transitions. [2019-09-03 20:51:55,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:51:55,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-03 20:51:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:55,157 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:51:55,157 INFO L226 Difference]: Without dead ends: 63 [2019-09-03 20:51:55,162 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 20:51:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-03 20:51:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2019-09-03 20:51:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 20:51:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2019-09-03 20:51:55,232 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 16 [2019-09-03 20:51:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:55,233 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2019-09-03 20:51:55,234 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:51:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2019-09-03 20:51:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-03 20:51:55,236 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:55,237 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:55,238 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:55,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1256946511, now seen corresponding path program 1 times [2019-09-03 20:51:55,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:55,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:55,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:55,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:55,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:55,346 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 20:51:55,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:55,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:51:55,349 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:55,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:51:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:51:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:51:55,352 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 6 states. [2019-09-03 20:51:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:55,549 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2019-09-03 20:51:55,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:51:55,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-03 20:51:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:55,553 INFO L225 Difference]: With dead ends: 60 [2019-09-03 20:51:55,553 INFO L226 Difference]: Without dead ends: 60 [2019-09-03 20:51:55,554 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 20:51:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-03 20:51:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-03 20:51:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:51:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2019-09-03 20:51:55,565 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 21 [2019-09-03 20:51:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:55,566 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2019-09-03 20:51:55,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:51:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2019-09-03 20:51:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-03 20:51:55,568 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:55,568 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:55,569 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2038837229, now seen corresponding path program 1 times [2019-09-03 20:51:55,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:55,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:55,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:55,571 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-03 20:51:55,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:55,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:51:55,624 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:55,624 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:51:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:51:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:51:55,625 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand 3 states. [2019-09-03 20:51:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:55,663 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2019-09-03 20:51:55,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:51:55,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2019-09-03 20:51:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:55,666 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:51:55,666 INFO L226 Difference]: Without dead ends: 60 [2019-09-03 20:51:55,668 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:51:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-03 20:51:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-03 20:51:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:51:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2019-09-03 20:51:55,683 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 50 [2019-09-03 20:51:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:55,685 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2019-09-03 20:51:55,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:51:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2019-09-03 20:51:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 20:51:55,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:55,690 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:55,690 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:55,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1689114790, now seen corresponding path program 1 times [2019-09-03 20:51:55,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:55,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:55,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:55,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:55,693 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-03 20:51:55,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:55,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:51:55,853 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:55,854 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:51:55,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:51:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:51:55,855 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2019-09-03 20:51:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:55,992 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2019-09-03 20:51:55,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:51:55,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-09-03 20:51:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:55,995 INFO L225 Difference]: With dead ends: 65 [2019-09-03 20:51:55,995 INFO L226 Difference]: Without dead ends: 65 [2019-09-03 20:51:55,995 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:51:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-03 20:51:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-09-03 20:51:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-03 20:51:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-09-03 20:51:56,004 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 51 [2019-09-03 20:51:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:56,004 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-09-03 20:51:56,005 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:51:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-09-03 20:51:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-03 20:51:56,007 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:56,007 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:56,007 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1728052911, now seen corresponding path program 1 times [2019-09-03 20:51:56,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:56,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:56,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:56,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:56,009 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-09-03 20:51:56,142 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:56,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-03 20:51:56,143 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:56,143 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:51:56,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:51:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:51:56,144 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 7 states. [2019-09-03 20:51:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:56,235 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2019-09-03 20:51:56,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:51:56,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2019-09-03 20:51:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:56,238 INFO L225 Difference]: With dead ends: 81 [2019-09-03 20:51:56,238 INFO L226 Difference]: Without dead ends: 81 [2019-09-03 20:51:56,239 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:51:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-03 20:51:56,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2019-09-03 20:51:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-03 20:51:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2019-09-03 20:51:56,248 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 86 [2019-09-03 20:51:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:56,248 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2019-09-03 20:51:56,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:51:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2019-09-03 20:51:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:51:56,251 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:56,251 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:51:56,251 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash -733340726, now seen corresponding path program 1 times [2019-09-03 20:51:56,252 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:56,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:56,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:56,253 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-09-03 20:51:56,333 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:56,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:51:56,333 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:56,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:51:56,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:51:56,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:51:56,335 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 6 states. [2019-09-03 20:51:56,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:56,439 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2019-09-03 20:51:56,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:51:56,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2019-09-03 20:51:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:56,442 INFO L225 Difference]: With dead ends: 79 [2019-09-03 20:51:56,442 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 20:51:56,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 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 20:51:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 20:51:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-03 20:51:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-03 20:51:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2019-09-03 20:51:56,459 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 91 [2019-09-03 20:51:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:56,460 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2019-09-03 20:51:56,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:51:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2019-09-03 20:51:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-03 20:51:56,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:56,468 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 20:51:56,468 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 259979376, now seen corresponding path program 1 times [2019-09-03 20:51:56,470 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:56,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:56,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:56,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:56,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 37 proven. 5 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-09-03 20:51:56,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:56,608 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:56,609 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 121 with the following transitions: [2019-09-03 20:51:56,611 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [42], [45], [56], [59], [74], [81], [84], [95], [98], [101], [109], [120], [123], [125], [128], [130], [131], [132], [133], [135], [136], [137], [138], [139], [140], [141], [142], [147], [148], [149], [150], [151], [152], [153], [154], [155], [156], [157], [158], [159], [160], [161], [162], [163], [164], [165], [166], [167], [168], [169], [170] [2019-09-03 20:51:56,660 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:51:56,661 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:51:57,075 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:51:57,078 INFO L272 AbstractInterpreter]: Visited 60 different actions 411 times. Merged at 10 different actions 60 times. Widened at 1 different actions 2 times. Performed 537 root evaluator evaluations with a maximum evaluation depth of 7. Performed 537 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 1 fixpoints after 1 different actions. Largest state had 15 variables. [2019-09-03 20:51:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:57,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:51:57,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:57,083 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 20:51:57,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:57,104 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:51:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:57,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:51:57,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:51:57,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:51:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2019-09-03 20:51:57,252 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:51:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2019-09-03 20:51:57,334 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:51:57,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2019-09-03 20:51:57,335 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:57,335 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:51:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:51:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:51:57,336 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 6 states. [2019-09-03 20:51:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:57,430 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2019-09-03 20:51:57,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:51:57,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-09-03 20:51:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:57,431 INFO L225 Difference]: With dead ends: 80 [2019-09-03 20:51:57,432 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:51:57,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:51:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:51:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:51:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:51:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:51:57,433 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2019-09-03 20:51:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:57,433 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:51:57,433 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:51:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:51:57,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:51:57,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:51:57 BoogieIcfgContainer [2019-09-03 20:51:57,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:51:57,441 INFO L168 Benchmark]: Toolchain (without parser) took 3603.92 ms. Allocated memory was 131.6 MB in the beginning and 267.9 MB in the end (delta: 136.3 MB). Free memory was 87.0 MB in the beginning and 131.6 MB in the end (delta: -44.6 MB). Peak memory consumption was 91.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:57,442 INFO L168 Benchmark]: CDTParser took 1.04 ms. Allocated memory is still 131.6 MB. Free memory is still 105.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-03 20:51:57,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.07 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 87.0 MB in the beginning and 175.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:57,444 INFO L168 Benchmark]: Boogie Preprocessor took 33.11 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 173.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:57,444 INFO L168 Benchmark]: RCFGBuilder took 341.30 ms. Allocated memory is still 198.7 MB. Free memory was 173.6 MB in the beginning and 156.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:57,446 INFO L168 Benchmark]: TraceAbstraction took 2875.42 ms. Allocated memory was 198.7 MB in the beginning and 267.9 MB in the end (delta: 69.2 MB). Free memory was 156.0 MB in the beginning and 131.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 93.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:57,449 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.04 ms. Allocated memory is still 131.6 MB. Free memory is still 105.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.07 ms. Allocated memory was 131.6 MB in the beginning and 198.7 MB in the end (delta: 67.1 MB). Free memory was 87.0 MB in the beginning and 175.5 MB in the end (delta: -88.5 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.11 ms. Allocated memory is still 198.7 MB. Free memory was 175.5 MB in the beginning and 173.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.30 ms. Allocated memory is still 198.7 MB. Free memory was 173.6 MB in the beginning and 156.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2875.42 ms. Allocated memory was 198.7 MB in the beginning and 267.9 MB in the end (delta: 69.2 MB). Free memory was 156.0 MB in the beginning and 131.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 93.6 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, 53 locations, 1 error locations. SAFE Result, 2.8s OverallTime, 7 OverallIterations, 19 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 462 SDtfs, 103 SDslu, 1193 SDs, 0 SdLazy, 384 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 555 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 666 ConstructedInterpolants, 0 QuantifiedInterpolants, 84828 SizeOfPredicates, 4 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 9 InterpolantComputations, 8 PerfectInterpolantSequences, 2729/2734 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...