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-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:58,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:58,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:58,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:25:58,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:58,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:58,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:58,229 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 13:25:58,245 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:58,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:58,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:58,246 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:58,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:58,247 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:58,247 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:58,248 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:58,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:58,248 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:58,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:58,249 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:58,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:58,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:58,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:58,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:58,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:58,250 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:58,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:58,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:58,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:58,251 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:58,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:58,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:58,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:58,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:58,252 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:58,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:58,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:58,253 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:58,282 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:58,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:58,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:58,304 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:58,304 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:58,305 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2019-09-20 13:25:58,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb43a8f80/b00f413aa55744bebc88ceffdb39d855/FLAGf96a1108f [2019-09-20 13:25:58,866 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:58,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2019-09-20 13:25:58,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb43a8f80/b00f413aa55744bebc88ceffdb39d855/FLAGf96a1108f [2019-09-20 13:25:59,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb43a8f80/b00f413aa55744bebc88ceffdb39d855 [2019-09-20 13:25:59,235 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:59,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:59,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:59,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:59,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:59,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44debaee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59, skipping insertion in model container [2019-09-20 13:25:59,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,253 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:59,270 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:59,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:59,467 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:59,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:59,496 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:59,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59 WrapperNode [2019-09-20 13:25:59,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:59,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:59,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:59,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:59,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (1/1) ... [2019-09-20 13:25:59,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:59,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:59,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:59,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:59,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (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 13:25:59,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:59,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:59,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:59,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:59,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:59,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:59,814 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:59,815 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:59,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:59 BoogieIcfgContainer [2019-09-20 13:25:59,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:59,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:59,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:59,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:59,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:59" (1/3) ... [2019-09-20 13:25:59,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d746c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:59, skipping insertion in model container [2019-09-20 13:25:59,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:59" (2/3) ... [2019-09-20 13:25:59,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d746c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:59, skipping insertion in model container [2019-09-20 13:25:59,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:59" (3/3) ... [2019-09-20 13:25:59,824 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2019-09-20 13:25:59,833 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:59,841 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:59,857 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:59,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:59,885 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:59,885 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:59,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:59,885 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:59,886 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:59,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:59,886 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 13:25:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:25:59,911 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:59,912 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:59,914 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1875203651, now seen corresponding path program 1 times [2019-09-20 13:25:59,922 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:59,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:59,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:59,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:59,968 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:00,144 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 13:26:00,153 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:00,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:26:00,154 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:00,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:26:00,201 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-09-20 13:26:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:00,383 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-09-20 13:26:00,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:26:00,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 13:26:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:00,396 INFO L225 Difference]: With dead ends: 26 [2019-09-20 13:26:00,396 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 13:26:00,398 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:26:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 13:26:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-09-20 13:26:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-20 13:26:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-20 13:26:00,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2019-09-20 13:26:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:00,431 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-20 13:26:00,431 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-20 13:26:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:26:00,433 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:00,433 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:00,434 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1632080392, now seen corresponding path program 1 times [2019-09-20 13:26:00,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:00,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:00,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:00,437 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:00,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:00,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:00,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-20 13:26:00,508 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [15], [21], [24], [26], [29], [31], [32], [33], [34], [36], [37] [2019-09-20 13:26:00,544 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:00,544 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:00,702 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:00,705 INFO L272 AbstractInterpreter]: Visited 14 different actions 59 times. Merged at 3 different actions 15 times. Widened at 1 different actions 1 times. Performed 75 root evaluator evaluations with a maximum evaluation depth of 5. Performed 75 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-20 13:26:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:00,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:00,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:00,711 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 13:26:00,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:00,736 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:00,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:26:00,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:00,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:00,807 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:00,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:00,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-09-20 13:26:00,862 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:00,863 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:26:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:26:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:26:00,864 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2019-09-20 13:26:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:00,949 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-20 13:26:00,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:26:00,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-20 13:26:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:00,951 INFO L225 Difference]: With dead ends: 28 [2019-09-20 13:26:00,951 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 13:26:00,952 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:26:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 13:26:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-20 13:26:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 13:26:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-20 13:26:00,963 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2019-09-20 13:26:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:00,965 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-20 13:26:00,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:26:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-20 13:26:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:26:00,966 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:00,967 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:00,967 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:00,970 INFO L82 PathProgramCache]: Analyzing trace with hash 282820957, now seen corresponding path program 2 times [2019-09-20 13:26:00,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:00,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:00,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:00,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:00,974 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:26:01,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:01,071 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:01,071 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:01,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:01,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:01,072 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:01,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:26:01,092 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-20 13:26:01,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 13:26:01,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:26:01,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 13:26:01,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:01,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:26:01,167 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:26:01,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:01,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2019-09-20 13:26:01,246 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:01,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:26:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:26:01,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-20 13:26:01,248 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2019-09-20 13:26:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:01,365 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-20 13:26:01,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:26:01,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-20 13:26:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:01,367 INFO L225 Difference]: With dead ends: 35 [2019-09-20 13:26:01,368 INFO L226 Difference]: Without dead ends: 35 [2019-09-20 13:26:01,369 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:26:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-20 13:26:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-20 13:26:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-20 13:26:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-20 13:26:01,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2019-09-20 13:26:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:01,379 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-20 13:26:01,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:26:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-20 13:26:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 13:26:01,381 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:01,382 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:01,382 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash 864272984, now seen corresponding path program 3 times [2019-09-20 13:26:01,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:01,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:26:01,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,386 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 13:26:01,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:01,492 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:01,492 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:01,493 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:01,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:01,493 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:01,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 13:26:01,521 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-20 13:26:01,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 13:26:01,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:26:01,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 13:26:01,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:01,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 13:26:01,573 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 13:26:01,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:01,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2019-09-20 13:26:01,665 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:01,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 13:26:01,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 13:26:01,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:26:01,667 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 10 states. [2019-09-20 13:26:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:01,747 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-20 13:26:01,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:26:01,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-20 13:26:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:01,749 INFO L225 Difference]: With dead ends: 42 [2019-09-20 13:26:01,749 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 13:26:01,750 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:26:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 13:26:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-20 13:26:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 13:26:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-20 13:26:01,757 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2019-09-20 13:26:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:01,757 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-20 13:26:01,757 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 13:26:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-20 13:26:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-20 13:26:01,759 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:01,759 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:01,759 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:01,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1759150333, now seen corresponding path program 4 times [2019-09-20 13:26:01,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:01,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:26:01,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:01,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-20 13:26:01,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:01,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:01,864 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:01,865 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:01,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:01,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:01,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:01,895 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:01,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 13:26:01,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:01,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-20 13:26:01,973 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-20 13:26:02,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:02,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2019-09-20 13:26:02,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:02,080 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 13:26:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 13:26:02,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-09-20 13:26:02,088 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 11 states. [2019-09-20 13:26:02,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:02,172 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-20 13:26:02,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 13:26:02,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-09-20 13:26:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:02,175 INFO L225 Difference]: With dead ends: 49 [2019-09-20 13:26:02,175 INFO L226 Difference]: Without dead ends: 49 [2019-09-20 13:26:02,176 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-09-20 13:26:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-20 13:26:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-20 13:26:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-20 13:26:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-20 13:26:02,186 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2019-09-20 13:26:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:02,187 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-20 13:26:02,188 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-20 13:26:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-20 13:26:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-20 13:26:02,191 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:02,192 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:02,192 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:02,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001672, now seen corresponding path program 5 times [2019-09-20 13:26:02,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:02,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:02,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:02,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:02,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-20 13:26:02,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:02,301 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:02,301 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-20 13:26:02,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:02,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:02,302 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 13:26:02,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:26:02,323 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:02,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 13:26:02,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:26:02,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 13:26:02,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:02,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-20 13:26:02,464 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:02,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:02,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-20 13:26:02,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-20 13:26:02,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 17 [2019-09-20 13:26:02,559 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:02,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 13:26:02,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 13:26:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-09-20 13:26:02,562 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 16 states. [2019-09-20 13:26:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:02,677 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-09-20 13:26:02,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-20 13:26:02,677 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2019-09-20 13:26:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:02,678 INFO L225 Difference]: With dead ends: 51 [2019-09-20 13:26:02,678 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:02,679 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-09-20 13:26:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:02,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-09-20 13:26:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:02,680 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:02,680 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 13:26:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:02,680 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:02,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:02 BoogieIcfgContainer [2019-09-20 13:26:02,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:02,688 INFO L168 Benchmark]: Toolchain (without parser) took 3451.17 ms. Allocated memory was 132.1 MB in the beginning and 262.1 MB in the end (delta: 130.0 MB). Free memory was 87.6 MB in the beginning and 191.7 MB in the end (delta: -104.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,689 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.17 ms. Allocated memory is still 132.1 MB. Free memory was 87.4 MB in the beginning and 78.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,691 INFO L168 Benchmark]: Boogie Preprocessor took 114.06 ms. Allocated memory was 132.1 MB in the beginning and 199.2 MB in the end (delta: 67.1 MB). Free memory was 78.2 MB in the beginning and 176.2 MB in the end (delta: -98.0 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,692 INFO L168 Benchmark]: RCFGBuilder took 204.06 ms. Allocated memory is still 199.2 MB. Free memory was 176.2 MB in the beginning and 164.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,693 INFO L168 Benchmark]: TraceAbstraction took 2868.30 ms. Allocated memory was 199.2 MB in the beginning and 262.1 MB in the end (delta: 62.9 MB). Free memory was 164.9 MB in the beginning and 191.7 MB in the end (delta: -26.8 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:02,697 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.17 ms. Allocated memory is still 132.1 MB. Free memory was 87.4 MB in the beginning and 78.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.06 ms. Allocated memory was 132.1 MB in the beginning and 199.2 MB in the end (delta: 67.1 MB). Free memory was 78.2 MB in the beginning and 176.2 MB in the end (delta: -98.0 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 204.06 ms. Allocated memory is still 199.2 MB. Free memory was 176.2 MB in the beginning and 164.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2868.30 ms. Allocated memory was 199.2 MB in the beginning and 262.1 MB in the end (delta: 62.9 MB). Free memory was 164.9 MB in the beginning and 191.7 MB in the end (delta: -26.8 MB). Peak memory consumption was 36.1 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, 19 locations, 1 error locations. SAFE Result, 2.8s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 63 SDslu, 272 SDs, 0 SdLazy, 286 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 320 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 27865 SizeOfPredicates, 11 NumberOfNonLiveVariables, 254 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 406/600 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...