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-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:13,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:13,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:13,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:03:13,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:13,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:13,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:13,383 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 [2019-09-16 17:03:13,398 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:13,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:13,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:13,398 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:13,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:13,399 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:13,399 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:13,400 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:13,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:13,400 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:13,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:13,401 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:13,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:13,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:13,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:13,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:13,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:13,402 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:13,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:13,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:13,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:13,403 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:13,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:13,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:13,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:13,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:13,404 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:13,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:13,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:13,404 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:13,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:13,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:13,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:13,448 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:13,448 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:13,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2019-09-16 17:03:13,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca77dd39/3306b9ece13c4ecca52bb8a8d70df075/FLAGf3a84a071 [2019-09-16 17:03:13,912 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:13,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2019-09-16 17:03:13,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca77dd39/3306b9ece13c4ecca52bb8a8d70df075/FLAGf3a84a071 [2019-09-16 17:03:14,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca77dd39/3306b9ece13c4ecca52bb8a8d70df075 [2019-09-16 17:03:14,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:14,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:14,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:14,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:14,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:14,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c806856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14, skipping insertion in model container [2019-09-16 17:03:14,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,342 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:14,365 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:14,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:14,619 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:14,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:14,759 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:14,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14 WrapperNode [2019-09-16 17:03:14,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:14,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:14,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:14,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:14,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (1/1) ... [2019-09-16 17:03:14,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:14,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:14,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:14,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:14,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (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 [2019-09-16 17:03:14,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:14,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:14,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-16 17:03:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-16 17:03:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 17:03:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 17:03:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 17:03:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:14,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 17:03:15,195 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:15,196 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-16 17:03:15,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:15 BoogieIcfgContainer [2019-09-16 17:03:15,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:15,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:15,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:15,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:15,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:14" (1/3) ... [2019-09-16 17:03:15,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6705f6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:15, skipping insertion in model container [2019-09-16 17:03:15,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:14" (2/3) ... [2019-09-16 17:03:15,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6705f6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:15, skipping insertion in model container [2019-09-16 17:03:15,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:15" (3/3) ... [2019-09-16 17:03:15,204 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2019-09-16 17:03:15,215 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:15,222 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-09-16 17:03:15,241 INFO L252 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-09-16 17:03:15,267 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:15,267 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:15,267 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:15,267 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:15,267 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:15,268 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:15,268 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:15,268 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-09-16 17:03:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:03:15,290 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:15,290 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:15,292 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:15,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1395858257, now seen corresponding path program 1 times [2019-09-16 17:03:15,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:15,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:15,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,347 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:15,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:15,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:03:15,486 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:15,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:03:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:03:15,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:15,509 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-09-16 17:03:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:15,549 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2019-09-16 17:03:15,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:03:15,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-16 17:03:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:15,563 INFO L225 Difference]: With dead ends: 42 [2019-09-16 17:03:15,564 INFO L226 Difference]: Without dead ends: 33 [2019-09-16 17:03:15,565 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 [2019-09-16 17:03:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-16 17:03:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-09-16 17:03:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-16 17:03:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-09-16 17:03:15,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2019-09-16 17:03:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:15,600 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-09-16 17:03:15,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:03:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-09-16 17:03:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 17:03:15,601 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:15,601 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:15,602 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1868760050, now seen corresponding path program 1 times [2019-09-16 17:03:15,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:15,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:15,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:15,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:15,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:03:15,692 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:15,694 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:03:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:03:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:03:15,695 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2019-09-16 17:03:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:15,733 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-09-16 17:03:15,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:03:15,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-16 17:03:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:15,735 INFO L225 Difference]: With dead ends: 49 [2019-09-16 17:03:15,736 INFO L226 Difference]: Without dead ends: 49 [2019-09-16 17:03:15,737 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:03:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-16 17:03:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2019-09-16 17:03:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-16 17:03:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-09-16 17:03:15,743 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 14 [2019-09-16 17:03:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:15,744 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-09-16 17:03:15,744 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:03:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-09-16 17:03:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 17:03:15,745 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:15,745 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:15,746 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:15,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1932482999, now seen corresponding path program 1 times [2019-09-16 17:03:15,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:15,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:15,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,749 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:15,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:15,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:03:15,793 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:15,796 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:03:15,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:03:15,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:15,796 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2019-09-16 17:03:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:15,845 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-09-16 17:03:15,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:03:15,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-16 17:03:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:15,847 INFO L225 Difference]: With dead ends: 40 [2019-09-16 17:03:15,847 INFO L226 Difference]: Without dead ends: 40 [2019-09-16 17:03:15,848 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 [2019-09-16 17:03:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-16 17:03:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-09-16 17:03:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-16 17:03:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-16 17:03:15,853 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2019-09-16 17:03:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:15,854 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-16 17:03:15,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:03:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-16 17:03:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-16 17:03:15,855 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:15,855 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:15,855 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2140784762, now seen corresponding path program 1 times [2019-09-16 17:03:15,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:15,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:15,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,858 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:15,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:15,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 17:03:15,900 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:15,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 17:03:15,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 17:03:15,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 17:03:15,901 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2019-09-16 17:03:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:15,950 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-09-16 17:03:15,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 17:03:15,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-16 17:03:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:15,951 INFO L225 Difference]: With dead ends: 34 [2019-09-16 17:03:15,952 INFO L226 Difference]: Without dead ends: 34 [2019-09-16 17:03:15,953 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 [2019-09-16 17:03:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-16 17:03:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2019-09-16 17:03:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-16 17:03:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-09-16 17:03:15,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2019-09-16 17:03:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:15,960 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-09-16 17:03:15,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 17:03:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-09-16 17:03:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-16 17:03:15,963 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:15,964 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:15,964 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash 341027121, now seen corresponding path program 1 times [2019-09-16 17:03:15,965 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:15,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:15,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:15,966 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:17,010 WARN L191 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 89 [2019-09-16 17:03:17,363 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 73 [2019-09-16 17:03:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:17,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:17,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-16 17:03:17,385 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:17,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-16 17:03:17,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-16 17:03:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:03:17,388 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2019-09-16 17:03:17,584 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2019-09-16 17:03:17,744 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2019-09-16 17:03:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:17,804 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-09-16 17:03:17,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-16 17:03:17,804 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-09-16 17:03:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:17,807 INFO L225 Difference]: With dead ends: 29 [2019-09-16 17:03:17,807 INFO L226 Difference]: Without dead ends: 29 [2019-09-16 17:03:17,807 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:03:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-16 17:03:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-16 17:03:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-16 17:03:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-09-16 17:03:17,813 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2019-09-16 17:03:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:17,813 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-09-16 17:03:17,814 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-16 17:03:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-09-16 17:03:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-16 17:03:17,816 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:17,816 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:17,817 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1330084180, now seen corresponding path program 1 times [2019-09-16 17:03:17,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:17,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:17,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:17,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:17,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:17,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:17,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-16 17:03:17,919 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:17,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 17:03:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 17:03:17,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-16 17:03:17,923 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2019-09-16 17:03:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:17,983 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-09-16 17:03:17,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-16 17:03:17,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-16 17:03:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:17,986 INFO L225 Difference]: With dead ends: 40 [2019-09-16 17:03:17,986 INFO L226 Difference]: Without dead ends: 40 [2019-09-16 17:03:17,987 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-09-16 17:03:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-16 17:03:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-09-16 17:03:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 17:03:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-16 17:03:17,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2019-09-16 17:03:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:17,996 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-16 17:03:17,996 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 17:03:17,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-16 17:03:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 17:03:17,997 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:17,997 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, 1] [2019-09-16 17:03:17,997 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1309636523, now seen corresponding path program 1 times [2019-09-16 17:03:17,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:18,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:18,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:18,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:18,001 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:18,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:18,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:18,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2019-09-16 17:03:18,183 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [8], [11], [14], [17], [20], [22], [28], [30], [33], [58], [62], [66], [69], [70], [72], [91], [92], [93] [2019-09-16 17:03:18,211 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:18,211 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:18,279 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-16 17:03:18,280 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 24 root evaluator evaluations with a maximum evaluation depth of 0. Performed 24 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 38 variables. [2019-09-16 17:03:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:18,284 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-16 17:03:18,327 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-16 17:03:18,327 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-16 17:03:18,331 INFO L420 sIntCurrentIteration]: We unified 21 AI predicates to 21 [2019-09-16 17:03:18,331 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-16 17:03:18,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:03:18,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-16 17:03:18,332 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:18,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:03:18,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:03:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:18,334 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 2 states. [2019-09-16 17:03:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:18,336 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-16 17:03:18,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:03:18,337 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-09-16 17:03:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:18,337 INFO L225 Difference]: With dead ends: 6 [2019-09-16 17:03:18,337 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:03:18,338 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:03:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:03:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:03:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:03:18,338 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2019-09-16 17:03:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:18,339 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:03:18,339 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:03:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:03:18,339 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:03:18,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:03:18 BoogieIcfgContainer [2019-09-16 17:03:18,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:03:18,347 INFO L168 Benchmark]: Toolchain (without parser) took 4019.07 ms. Allocated memory was 136.3 MB in the beginning and 263.7 MB in the end (delta: 127.4 MB). Free memory was 86.6 MB in the beginning and 197.5 MB in the end (delta: -110.9 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:18,348 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:03:18,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 432.05 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 86.4 MB in the beginning and 176.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:18,352 INFO L168 Benchmark]: Boogie Preprocessor took 40.74 ms. Allocated memory is still 199.2 MB. Free memory was 176.1 MB in the beginning and 174.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:18,353 INFO L168 Benchmark]: RCFGBuilder took 392.83 ms. Allocated memory is still 199.2 MB. Free memory was 174.2 MB in the beginning and 156.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:18,357 INFO L168 Benchmark]: TraceAbstraction took 3146.36 ms. Allocated memory was 199.2 MB in the beginning and 263.7 MB in the end (delta: 64.5 MB). Free memory was 155.5 MB in the beginning and 197.5 MB in the end (delta: -42.0 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:18,361 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.3 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 432.05 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 86.4 MB in the beginning and 176.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.74 ms. Allocated memory is still 199.2 MB. Free memory was 176.1 MB in the beginning and 174.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 392.83 ms. Allocated memory is still 199.2 MB. Free memory was 174.2 MB in the beginning and 156.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3146.36 ms. Allocated memory was 199.2 MB in the beginning and 263.7 MB in the end (delta: 64.5 MB). Free memory was 155.5 MB in the beginning and 197.5 MB in the end (delta: -42.0 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 37]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 36 locations, 3 error locations. SAFE Result, 3.0s OverallTime, 7 OverallIterations, 2 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 194 SDtfs, 149 SDslu, 245 SDs, 0 SdLazy, 102 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9761904761904762 AbsIntWeakeningRatio, 1.5238095238095237 AbsIntAvgWeakeningVarsNumRemoved, 1.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 45714 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...