java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:52:24,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:52:24,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:52:24,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:52:24,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:52:24,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:52:24,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:52:24,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 20:52:24,429 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:52:24,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:52:24,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:52:24,431 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:52:24,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:52:24,433 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:52:24,433 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:52:24,433 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:52:24,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:52:24,434 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:52:24,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:52:24,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:52:24,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:52:24,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:52:24,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:52:24,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:52:24,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:52:24,438 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:52:24,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:52:24,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:52:24,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:52:24,439 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:52:24,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:52:24,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:52:24,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:52:24,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:52:24,440 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:52:24,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:52:24,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:52:24,440 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:52:24,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:52:24,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:52:24,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:52:24,514 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:52:24,515 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:52:24,516 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2019-09-03 20:52:24,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7dd87685/f22d2ac1392a4b1aaa73de165f917046/FLAG162fbf9d6 [2019-09-03 20:52:24,990 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:52:24,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2019-09-03 20:52:24,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7dd87685/f22d2ac1392a4b1aaa73de165f917046/FLAG162fbf9d6 [2019-09-03 20:52:25,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7dd87685/f22d2ac1392a4b1aaa73de165f917046 [2019-09-03 20:52:25,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:52:25,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:52:25,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:52:25,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:52:25,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:52:25,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a9b046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25, skipping insertion in model container [2019-09-03 20:52:25,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,417 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:52:25,432 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:52:25,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:52:25,626 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:52:25,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:52:25,655 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:52:25,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25 WrapperNode [2019-09-03 20:52:25,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:52:25,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:52:25,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:52:25,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:52:25,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... [2019-09-03 20:52:25,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:52:25,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:52:25,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:52:25,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:52:25,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:52:25,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:52:25,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:52:25,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:52:25,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:52:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:52:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:52:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:52:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:52:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:52:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:52:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:52:26,053 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:52:26,053 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-03 20:52:26,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:52:26 BoogieIcfgContainer [2019-09-03 20:52:26,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:52:26,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:52:26,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:52:26,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:52:26,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:52:25" (1/3) ... [2019-09-03 20:52:26,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96729d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:52:26, skipping insertion in model container [2019-09-03 20:52:26,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:52:25" (2/3) ... [2019-09-03 20:52:26,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96729d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:52:26, skipping insertion in model container [2019-09-03 20:52:26,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:52:26" (3/3) ... [2019-09-03 20:52:26,064 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2019-09-03 20:52:26,079 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:52:26,091 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:52:26,138 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:52:26,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:52:26,167 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:52:26,167 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:52:26,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:52:26,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:52:26,168 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:52:26,168 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:52:26,168 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:52:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-03 20:52:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 20:52:26,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:26,197 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:26,200 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash -810471198, now seen corresponding path program 1 times [2019-09-03 20:52:26,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:26,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:26,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:26,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:26,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-03 20:52:26,440 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:26,444 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:52:26,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:52:26,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:52:26,461 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2019-09-03 20:52:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:26,680 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-09-03 20:52:26,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:52:26,682 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-09-03 20:52:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:26,692 INFO L225 Difference]: With dead ends: 50 [2019-09-03 20:52:26,692 INFO L226 Difference]: Without dead ends: 36 [2019-09-03 20:52:26,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:52:26,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-03 20:52:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-09-03 20:52:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:52:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-03 20:52:26,736 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2019-09-03 20:52:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:26,736 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-03 20:52:26,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:52:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-03 20:52:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:52:26,738 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:26,738 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:26,739 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1204298207, now seen corresponding path program 1 times [2019-09-03 20:52:26,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,741 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:52:26,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:52:26,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-03 20:52:26,805 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:26,806 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-03 20:52:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-03 20:52:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-03 20:52:26,807 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2019-09-03 20:52:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:26,858 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-03 20:52:26,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:52:26,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-09-03 20:52:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:26,869 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:52:26,869 INFO L226 Difference]: Without dead ends: 33 [2019-09-03 20:52:26,870 INFO L628 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 [2019-09-03 20:52:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-03 20:52:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-03 20:52:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:52:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-03 20:52:26,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2019-09-03 20:52:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:26,879 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-03 20:52:26,879 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-03 20:52:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-03 20:52:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:52:26,881 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:26,881 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:26,881 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:26,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2040308290, now seen corresponding path program 1 times [2019-09-03 20:52:26,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:26,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:26,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:26,885 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:27,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:27,023 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:27,024 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-03 20:52:27,026 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [48], [51], [59], [65], [68], [70], [73], [75], [76], [77], [78], [80], [81] [2019-09-03 20:52:27,067 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:52:27,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:52:27,200 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:52:27,202 INFO L272 AbstractInterpreter]: Visited 24 different actions 28 times. Merged at 3 different actions 3 times. Never widened. Performed 41 root evaluator evaluations with a maximum evaluation depth of 7. Performed 41 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 2 fixpoints after 2 different actions. Largest state had 13 variables. [2019-09-03 20:52:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:27,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:52:27,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:27,208 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) [2019-09-03 20:52:27,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:27,239 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:27,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 20:52:27,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:27,364 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:52:27,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:52:27,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2019-09-03 20:52:27,415 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:52:27,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:52:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:52:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:52:27,417 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2019-09-03 20:52:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:27,675 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-03 20:52:27,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:52:27,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-09-03 20:52:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:27,678 INFO L225 Difference]: With dead ends: 46 [2019-09-03 20:52:27,678 INFO L226 Difference]: Without dead ends: 46 [2019-09-03 20:52:27,679 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:52:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-03 20:52:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-09-03 20:52:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:52:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-09-03 20:52:27,689 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2019-09-03 20:52:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:27,691 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-09-03 20:52:27,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:52:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-09-03 20:52:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 20:52:27,693 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:27,693 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:27,694 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:27,694 INFO L82 PathProgramCache]: Analyzing trace with hash 911329064, now seen corresponding path program 1 times [2019-09-03 20:52:27,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:27,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:27,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:27,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:27,696 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:52:27,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:27,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:27,798 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2019-09-03 20:52:27,799 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [46], [48], [51], [55], [59], [65], [68], [70], [73], [75], [76], [77], [78], [80], [81] [2019-09-03 20:52:27,802 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:52:27,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:52:27,960 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:52:27,961 INFO L272 AbstractInterpreter]: Visited 26 different actions 98 times. Merged at 9 different actions 36 times. Widened at 4 different actions 8 times. Performed 189 root evaluator evaluations with a maximum evaluation depth of 7. Performed 189 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 13 fixpoints after 7 different actions. Largest state had 14 variables. [2019-09-03 20:52:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:27,961 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:52:27,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:27,961 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:52:27,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:27,980 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:27,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:52:28,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-03 20:52:28,073 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 20:52:28,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:52:28,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2019-09-03 20:52:28,149 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:52:28,150 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:52:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:52:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:52:28,151 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2019-09-03 20:52:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:28,254 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-03 20:52:28,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:52:28,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-09-03 20:52:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:28,259 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:52:28,259 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 20:52:28,260 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:52:28,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 20:52:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-09-03 20:52:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:52:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-09-03 20:52:28,273 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2019-09-03 20:52:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:28,273 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-09-03 20:52:28,273 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:52:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-09-03 20:52:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-03 20:52:28,277 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:52:28,279 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:52:28,279 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:52:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:52:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash -973854811, now seen corresponding path program 2 times [2019-09-03 20:52:28,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:52:28,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:28,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:52:28,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:52:28,285 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:52:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:52:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:52:28,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:28,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:52:28,420 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:52:28,420 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:52:28,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:52:28,421 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) [2019-09-03 20:52:28,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:52:28,444 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:52:28,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-09-03 20:52:28,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:52:28,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 20:52:28,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:52:28,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:52:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-03 20:52:28,561 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:52:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-03 20:52:28,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:52:28,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2019-09-03 20:52:28,631 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:52:28,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:52:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:52:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:52:28,635 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 12 states. [2019-09-03 20:52:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:52:28,854 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-09-03 20:52:28,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:52:28,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-09-03 20:52:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:52:28,855 INFO L225 Difference]: With dead ends: 41 [2019-09-03 20:52:28,855 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:52:28,856 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:52:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:52:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:52:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:52:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:52:28,856 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2019-09-03 20:52:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:52:28,857 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:52:28,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:52:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:52:28,857 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:52:28,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:52:28 BoogieIcfgContainer [2019-09-03 20:52:28,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:52:28,869 INFO L168 Benchmark]: Toolchain (without parser) took 3461.61 ms. Allocated memory was 132.6 MB in the beginning and 260.6 MB in the end (delta: 127.9 MB). Free memory was 88.6 MB in the beginning and 220.4 MB in the end (delta: -131.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-03 20:52:28,870 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:52:28,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.45 ms. Allocated memory is still 132.6 MB. Free memory was 88.2 MB in the beginning and 78.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:28,872 INFO L168 Benchmark]: Boogie Preprocessor took 116.39 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 78.9 MB in the beginning and 176.7 MB in the end (delta: -97.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:28,873 INFO L168 Benchmark]: RCFGBuilder took 281.65 ms. Allocated memory is still 199.8 MB. Free memory was 176.7 MB in the beginning and 161.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:28,874 INFO L168 Benchmark]: TraceAbstraction took 2806.47 ms. Allocated memory was 199.8 MB in the beginning and 260.6 MB in the end (delta: 60.8 MB). Free memory was 161.9 MB in the beginning and 220.4 MB in the end (delta: -58.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-09-03 20:52:28,879 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 132.6 MB. Free memory was 106.9 MB in the beginning and 106.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.45 ms. Allocated memory is still 132.6 MB. Free memory was 88.2 MB in the beginning and 78.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.39 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 78.9 MB in the beginning and 176.7 MB in the end (delta: -97.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.65 ms. Allocated memory is still 199.8 MB. Free memory was 176.7 MB in the beginning and 161.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2806.47 ms. Allocated memory was 199.8 MB in the beginning and 260.6 MB in the end (delta: 60.8 MB). Free memory was 161.9 MB in the beginning and 220.4 MB in the end (delta: -58.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 2.7s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 110 SDtfs, 94 SDslu, 390 SDs, 0 SdLazy, 351 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 190 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 249 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 341 ConstructedInterpolants, 0 QuantifiedInterpolants, 24115 SizeOfPredicates, 13 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 141/154 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...