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-fea9116 [2019-09-20 13:25:30,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:30,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:30,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:30,860 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 [2019-09-20 13:25:30,875 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:30,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:30,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:30,876 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:30,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:30,877 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:30,877 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:30,877 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:30,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:30,878 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:30,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:30,879 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:30,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:30,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:30,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:30,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:30,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:30,880 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:30,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:30,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:30,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:30,881 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:30,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:30,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:30,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:30,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:30,882 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:30,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:30,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:30,882 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:30,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:30,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:30,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:30,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:30,931 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:30,931 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2019-09-20 13:25:30,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5442ab8e1/a1c3e823f3ce43fd871ebf4951a1c198/FLAGabc0ab465 [2019-09-20 13:25:31,476 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:31,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2019-09-20 13:25:31,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5442ab8e1/a1c3e823f3ce43fd871ebf4951a1c198/FLAGabc0ab465 [2019-09-20 13:25:31,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5442ab8e1/a1c3e823f3ce43fd871ebf4951a1c198 [2019-09-20 13:25:31,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:31,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:31,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:31,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:31,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:31,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eaef6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:31, skipping insertion in model container [2019-09-20 13:25:31,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:31" (1/1) ... [2019-09-20 13:25:31,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:31,900 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:32,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:32,144 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:32,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:32,266 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:32,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32 WrapperNode [2019-09-20 13:25:32,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:32,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:32,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:32,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:32,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (1/1) ... [2019-09-20 13:25:32,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:32,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:32,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:32,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:32,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (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 [2019-09-20 13:25:32,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:32,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:32,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:32,364 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:32,649 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:32,649 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 13:25:32,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:32 BoogieIcfgContainer [2019-09-20 13:25:32,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:32,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:32,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:32,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:32,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:31" (1/3) ... [2019-09-20 13:25:32,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a0a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:32, skipping insertion in model container [2019-09-20 13:25:32,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:32" (2/3) ... [2019-09-20 13:25:32,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a0a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:32, skipping insertion in model container [2019-09-20 13:25:32,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:32" (3/3) ... [2019-09-20 13:25:32,669 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2019-09-20 13:25:32,684 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:32,693 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:32,740 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:32,763 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:32,764 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:32,764 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:32,764 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:32,764 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:32,764 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:32,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:32,765 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-09-20 13:25:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:25:32,789 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:32,790 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:32,792 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1277279000, now seen corresponding path program 1 times [2019-09-20 13:25:32,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:32,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:32,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:32,853 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:33,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:33,004 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,009 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:33,023 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 5 states. [2019-09-20 13:25:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,214 INFO L93 Difference]: Finished difference Result 71 states and 111 transitions. [2019-09-20 13:25:33,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:33,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-20 13:25:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,227 INFO L225 Difference]: With dead ends: 71 [2019-09-20 13:25:33,227 INFO L226 Difference]: Without dead ends: 63 [2019-09-20 13:25:33,230 INFO L636 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 [2019-09-20 13:25:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-20 13:25:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2019-09-20 13:25:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-20 13:25:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2019-09-20 13:25:33,290 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 16 [2019-09-20 13:25:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,292 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2019-09-20 13:25:33,292 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2019-09-20 13:25:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 13:25:33,294 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,294 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:33,295 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1256946511, now seen corresponding path program 1 times [2019-09-20 13:25:33,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,301 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:33,431 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:33,433 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:33,439 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 6 states. [2019-09-20 13:25:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,655 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2019-09-20 13:25:33,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:33,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-20 13:25:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,660 INFO L225 Difference]: With dead ends: 60 [2019-09-20 13:25:33,660 INFO L226 Difference]: Without dead ends: 60 [2019-09-20 13:25:33,661 INFO L636 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 [2019-09-20 13:25:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-20 13:25:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-20 13:25:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-20 13:25:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2019-09-20 13:25:33,674 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 21 [2019-09-20 13:25:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,674 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2019-09-20 13:25:33,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2019-09-20 13:25:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-20 13:25:33,677 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,677 INFO L407 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] [2019-09-20 13:25:33,677 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2038837229, now seen corresponding path program 1 times [2019-09-20 13:25:33,678 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,680 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-20 13:25:33,747 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:25:33,748 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:25:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:25:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:33,751 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand 3 states. [2019-09-20 13:25:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:33,777 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2019-09-20 13:25:33,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:25:33,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2019-09-20 13:25:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:33,780 INFO L225 Difference]: With dead ends: 63 [2019-09-20 13:25:33,780 INFO L226 Difference]: Without dead ends: 60 [2019-09-20 13:25:33,781 INFO L636 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 [2019-09-20 13:25:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-20 13:25:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-20 13:25:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-20 13:25:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2019-09-20 13:25:33,791 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 50 [2019-09-20 13:25:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:33,791 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2019-09-20 13:25:33,792 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:25:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2019-09-20 13:25:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 13:25:33,794 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:33,794 INFO L407 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] [2019-09-20 13:25:33,794 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:33,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1689114790, now seen corresponding path program 1 times [2019-09-20 13:25:33,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:33,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:33,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:33,797 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-20 13:25:33,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:33,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:33,935 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:33,936 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:33,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:33,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:33,937 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2019-09-20 13:25:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:34,088 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2019-09-20 13:25:34,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:34,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-09-20 13:25:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:34,090 INFO L225 Difference]: With dead ends: 65 [2019-09-20 13:25:34,090 INFO L226 Difference]: Without dead ends: 65 [2019-09-20 13:25:34,091 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-20 13:25:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-09-20 13:25:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-20 13:25:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-09-20 13:25:34,100 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 51 [2019-09-20 13:25:34,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:34,100 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-09-20 13:25:34,100 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-09-20 13:25:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-20 13:25:34,104 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:34,104 INFO L407 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] [2019-09-20 13:25:34,104 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1728052911, now seen corresponding path program 1 times [2019-09-20 13:25:34,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:34,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:34,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:34,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:34,107 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-09-20 13:25:34,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:34,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:25:34,278 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:34,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:25:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:25:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:34,280 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 7 states. [2019-09-20 13:25:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:34,383 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2019-09-20 13:25:34,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:25:34,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2019-09-20 13:25:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:34,388 INFO L225 Difference]: With dead ends: 81 [2019-09-20 13:25:34,389 INFO L226 Difference]: Without dead ends: 81 [2019-09-20 13:25:34,389 INFO L636 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 [2019-09-20 13:25:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-20 13:25:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2019-09-20 13:25:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-20 13:25:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2019-09-20 13:25:34,405 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 86 [2019-09-20 13:25:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:34,406 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2019-09-20 13:25:34,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:25:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2019-09-20 13:25:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-20 13:25:34,417 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:34,417 INFO L407 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] [2019-09-20 13:25:34,418 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash -733340726, now seen corresponding path program 1 times [2019-09-20 13:25:34,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:34,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:34,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:34,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:34,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-09-20 13:25:34,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:34,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:25:34,541 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:34,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:34,543 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 6 states. [2019-09-20 13:25:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:34,639 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2019-09-20 13:25:34,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:34,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2019-09-20 13:25:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:34,642 INFO L225 Difference]: With dead ends: 79 [2019-09-20 13:25:34,642 INFO L226 Difference]: Without dead ends: 79 [2019-09-20 13:25:34,642 INFO L636 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 [2019-09-20 13:25:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-20 13:25:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-20 13:25:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-20 13:25:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2019-09-20 13:25:34,660 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 91 [2019-09-20 13:25:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:34,660 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2019-09-20 13:25:34,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2019-09-20 13:25:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-20 13:25:34,666 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:34,669 INFO L407 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] [2019-09-20 13:25:34,670 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 259979376, now seen corresponding path program 1 times [2019-09-20 13:25:34,670 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:34,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:34,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:34,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:34,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 37 proven. 5 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-09-20 13:25:34,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:34,810 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:34,811 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 121 with the following transitions: [2019-09-20 13:25:34,813 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] [2019-09-20 13:25:34,850 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:34,851 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:35,263 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:25:35,266 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. [2019-09-20 13:25:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:35,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:25:35,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:35,271 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 [2019-09-20 13:25:35,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:35,292 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:25:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:35,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:25:35,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:35,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2019-09-20 13:25:35,496 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:25:35,593 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:25:35,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 9 [2019-09-20 13:25:35,593 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:35,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:25:35,595 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 6 states. [2019-09-20 13:25:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:35,669 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2019-09-20 13:25:35,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:35,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-09-20 13:25:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:35,670 INFO L225 Difference]: With dead ends: 80 [2019-09-20 13:25:35,670 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:35,671 INFO L636 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 [2019-09-20 13:25:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:35,672 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2019-09-20 13:25:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:35,672 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:35,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:35,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:35,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:35 BoogieIcfgContainer [2019-09-20 13:25:35,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:35,680 INFO L168 Benchmark]: Toolchain (without parser) took 3818.53 ms. Allocated memory was 133.2 MB in the beginning and 261.6 MB in the end (delta: 128.5 MB). Free memory was 89.1 MB in the beginning and 117.5 MB in the end (delta: -28.4 MB). Peak memory consumption was 100.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:35,681 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:35,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.26 ms. Allocated memory was 133.2 MB in the beginning and 199.2 MB in the end (delta: 66.1 MB). Free memory was 88.9 MB in the beginning and 176.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:35,683 INFO L168 Benchmark]: Boogie Preprocessor took 32.57 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 174.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:35,683 INFO L168 Benchmark]: RCFGBuilder took 349.62 ms. Allocated memory is still 199.2 MB. Free memory was 174.4 MB in the beginning and 156.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:35,685 INFO L168 Benchmark]: TraceAbstraction took 3025.88 ms. Allocated memory was 199.2 MB in the beginning and 261.6 MB in the end (delta: 62.4 MB). Free memory was 156.4 MB in the beginning and 117.5 MB in the end (delta: 38.9 MB). Peak memory consumption was 101.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:35,688 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 133.2 MB. Free memory was 107.4 MB in the beginning and 107.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 406.26 ms. Allocated memory was 133.2 MB in the beginning and 199.2 MB in the end (delta: 66.1 MB). Free memory was 88.9 MB in the beginning and 176.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.57 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 174.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.62 ms. Allocated memory is still 199.2 MB. Free memory was 174.4 MB in the beginning and 156.4 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3025.88 ms. Allocated memory was 199.2 MB in the beginning and 261.6 MB in the end (delta: 62.4 MB). Free memory was 156.4 MB in the beginning and 117.5 MB in the end (delta: 38.9 MB). Peak memory consumption was 101.3 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, 2.9s 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, 289 GetRequests, 249 SyntacticMatches, 5 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, 0.8s InterpolantComputationTime, 555 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 666 ConstructedInterpolants, 0 QuantifiedInterpolants, 84368 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...