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/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:45:58,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:45:58,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:45:58,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:45:58,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:45:58,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:45:58,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:45:58,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:45:58,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:45:58,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:45:58,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:45:58,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-05 12:45:58,834 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 [2019-09-05 12:45:58,862 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:45:58,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:45:58,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:45:58,864 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:45:58,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:45:58,865 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:45:58,865 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:45:58,865 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:45:58,865 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:45:58,865 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:45:58,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:45:58,868 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:45:58,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:45:58,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:45:58,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:45:58,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:45:58,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:45:58,869 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:45:58,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:45:58,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:45:58,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:45:58,870 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:45:58,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:45:58,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:45:58,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:45:58,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:45:58,872 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:45:58,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:45:58,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:45:58,872 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:45:58,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:45:58,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:45:58,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:45:58,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:45:58,950 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:45:58,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2019-09-05 12:45:59,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce5070b9/da017bd8b12143be9157caed304a13a2/FLAGdd7ece665 [2019-09-05 12:45:59,426 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:45:59,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2019-09-05 12:45:59,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce5070b9/da017bd8b12143be9157caed304a13a2/FLAGdd7ece665 [2019-09-05 12:45:59,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce5070b9/da017bd8b12143be9157caed304a13a2 [2019-09-05 12:45:59,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:45:59,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:45:59,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:45:59,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:45:59,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:45:59,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:45:59" (1/1) ... [2019-09-05 12:45:59,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39268ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:45:59, skipping insertion in model container [2019-09-05 12:45:59,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:45:59" (1/1) ... [2019-09-05 12:45:59,851 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:45:59,865 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:00,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:00,041 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:00,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:00,070 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:00,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00 WrapperNode [2019-09-05 12:46:00,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:00,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:00,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:00,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:00,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (1/1) ... [2019-09-05 12:46:00,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:00,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:00,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:00,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:00,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (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 [2019-09-05 12:46:00,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:00,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:00,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:00,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-05 12:46:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:00,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:00,402 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:00,403 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:46:00,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:00 BoogieIcfgContainer [2019-09-05 12:46:00,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:00,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:00,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:00,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:00,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:45:59" (1/3) ... [2019-09-05 12:46:00,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150644b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:00, skipping insertion in model container [2019-09-05 12:46:00,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:00" (2/3) ... [2019-09-05 12:46:00,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150644b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:00, skipping insertion in model container [2019-09-05 12:46:00,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:00" (3/3) ... [2019-09-05 12:46:00,413 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-09-05 12:46:00,423 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:00,431 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:00,449 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:00,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:00,488 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:00,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:00,488 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:00,488 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:00,489 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:00,489 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:00,489 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-05 12:46:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:46:00,525 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:00,526 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:00,530 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:00,538 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-05 12:46:00,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:00,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:00,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:00,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:00,597 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:00,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:00,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:46:00,666 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:00,670 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:00,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:00,684 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-05 12:46:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:00,701 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-09-05 12:46:00,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:00,703 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:46:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:00,712 INFO L225 Difference]: With dead ends: 19 [2019-09-05 12:46:00,713 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 12:46:00,715 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 12:46:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 12:46:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 12:46:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-05 12:46:00,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-05 12:46:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:00,754 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-05 12:46:00,754 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-05 12:46:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:46:00,755 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:00,755 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:00,755 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:00,756 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-09-05 12:46:00,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:00,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:00,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:00,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:00,758 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:00,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:00,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:46:00,881 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:00,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:46:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:46:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:46:00,886 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-05 12:46:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:00,953 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-09-05 12:46:00,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:46:00,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:46:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:00,954 INFO L225 Difference]: With dead ends: 19 [2019-09-05 12:46:00,955 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:46:00,956 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:46:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:46:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 12:46:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 12:46:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-05 12:46:00,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-05 12:46:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:00,961 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-05 12:46:00,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:46:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-05 12:46:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:46:00,962 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:00,962 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:00,962 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-09-05 12:46:00,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:00,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:00,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:00,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:00,965 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:01,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:01,208 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:01,210 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-05 12:46:01,212 INFO L207 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [19], [25], [28], [30], [36], [37], [38], [40] [2019-09-05 12:46:01,249 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:01,249 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:01,316 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 12:46:01,471 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 12:46:01,474 INFO L272 AbstractInterpreter]: Visited 13 different actions 61 times. Merged at 4 different actions 24 times. Widened at 1 different actions 4 times. Performed 101 root evaluator evaluations with a maximum evaluation depth of 6. Performed 101 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-09-05 12:46:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:01,479 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 12:46:01,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:01,479 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 [2019-09-05 12:46:01,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:01,496 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 12:46:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:01,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:46:01,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:01,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:46:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:01,712 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:01,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:01,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2019-09-05 12:46:01,972 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:01,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:46:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:46:01,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:46:01,975 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 16 states. [2019-09-05 12:46:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:02,174 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-09-05 12:46:02,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:46:02,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-09-05 12:46:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:02,176 INFO L225 Difference]: With dead ends: 26 [2019-09-05 12:46:02,176 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:46:02,177 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:46:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:46:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-09-05 12:46:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 12:46:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-05 12:46:02,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-09-05 12:46:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:02,181 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-05 12:46:02,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:46:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-05 12:46:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:46:02,182 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:02,182 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:02,182 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2019-09-05 12:46:02,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:02,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:02,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:02,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:02,184 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:02,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:02,222 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:02,223 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-05 12:46:02,223 INFO L207 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2019-09-05 12:46:02,224 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:02,225 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:02,226 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 12:46:02,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 12:46:02,311 INFO L272 AbstractInterpreter]: Visited 14 different actions 90 times. Merged at 5 different actions 36 times. Widened at 1 different actions 6 times. Performed 158 root evaluator evaluations with a maximum evaluation depth of 6. Performed 158 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 2 different actions. Largest state had 5 variables. [2019-09-05 12:46:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:02,312 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 12:46:02,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:02,312 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 [2019-09-05 12:46:02,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:02,330 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 12:46:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:02,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-05 12:46:02,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:02,351 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:02,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:02,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2019-09-05 12:46:02,396 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:02,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:46:02,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:46:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:46:02,397 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2019-09-05 12:46:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:02,433 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-09-05 12:46:02,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:46:02,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-05 12:46:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:02,435 INFO L225 Difference]: With dead ends: 22 [2019-09-05 12:46:02,435 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:46:02,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:46:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:46:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-05 12:46:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 12:46:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-05 12:46:02,442 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-05 12:46:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:02,442 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-05 12:46:02,443 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:46:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-05 12:46:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:46:02,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:02,444 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:02,445 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2019-09-05 12:46:02,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:02,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:02,450 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-05 12:46:02,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:02,701 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:02,701 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 12:46:02,701 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 12:46:02,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:02,702 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 [2019-09-05 12:46:02,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:46:02,717 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-05 12:46:02,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-05 12:46:02,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:46:02,733 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:46:02,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:02,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:46:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:02,965 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:03,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:03,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2019-09-05 12:46:03,347 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:03,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:46:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:46:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:46:03,354 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2019-09-05 12:46:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:03,916 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-09-05 12:46:03,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:46:03,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2019-09-05 12:46:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:03,917 INFO L225 Difference]: With dead ends: 32 [2019-09-05 12:46:03,917 INFO L226 Difference]: Without dead ends: 28 [2019-09-05 12:46:03,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:46:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-05 12:46:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-05 12:46:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-05 12:46:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-09-05 12:46:03,923 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-09-05 12:46:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:03,923 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-09-05 12:46:03,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:46:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-09-05 12:46:03,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 12:46:03,925 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:03,925 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:03,925 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 2 times [2019-09-05 12:46:03,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:03,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:03,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:46:03,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:03,927 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:03,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:03,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:03,986 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 12:46:03,987 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 12:46:03,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:03,987 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) [2019-09-05 12:46:04,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:46:04,001 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:46:04,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-05 12:46:04,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:46:04,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-05 12:46:04,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,033 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:04,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2019-09-05 12:46:04,086 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:04,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:46:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:46:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,087 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2019-09-05 12:46:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:04,125 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-09-05 12:46:04,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:46:04,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-05 12:46:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:04,127 INFO L225 Difference]: With dead ends: 31 [2019-09-05 12:46:04,127 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:46:04,128 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:46:04,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-05 12:46:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:46:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-05 12:46:04,133 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-09-05 12:46:04,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:04,134 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-05 12:46:04,134 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:46:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-05 12:46:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:46:04,135 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:04,135 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:04,135 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:04,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 3 times [2019-09-05 12:46:04,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:04,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:46:04,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,137 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:04,208 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:04,208 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 12:46:04,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 12:46:04,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:04,209 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) [2019-09-05 12:46:04,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:46:04,222 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:46:04,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:46:04,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:46:04,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-05 12:46:04,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,248 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:46:04,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:04,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2019-09-05 12:46:04,313 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:04,314 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:46:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:46:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,315 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2019-09-05 12:46:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:04,374 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-09-05 12:46:04,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:46:04,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-05 12:46:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:04,376 INFO L225 Difference]: With dead ends: 34 [2019-09-05 12:46:04,376 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 12:46:04,376 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 12:46:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-05 12:46:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 12:46:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-09-05 12:46:04,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2019-09-05 12:46:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:04,381 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-09-05 12:46:04,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:46:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-09-05 12:46:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:46:04,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:04,383 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:04,383 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:04,383 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 4 times [2019-09-05 12:46:04,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:04,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:46:04,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,385 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:04,439 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:04,439 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 12:46:04,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 12:46:04,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:04,439 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:46:04,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:04,455 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 12:46:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:04,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-05 12:46:04,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,477 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:04,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2019-09-05 12:46:04,549 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:04,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:46:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:46:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,550 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2019-09-05 12:46:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:04,598 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-09-05 12:46:04,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:46:04,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-09-05 12:46:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:04,601 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:46:04,601 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:46:04,602 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:46:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-05 12:46:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-05 12:46:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-05 12:46:04,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-09-05 12:46:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:04,612 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-05 12:46:04,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:46:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-05 12:46:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 12:46:04,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:04,615 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:04,615 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:04,616 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 5 times [2019-09-05 12:46:04,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:04,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:04,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,619 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:04,711 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:04,711 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 12:46:04,711 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 12:46:04,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:04,712 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 12:46:04,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:46:04,730 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:46:04,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-05 12:46:04,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:46:04,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 12:46:04,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,760 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:04,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:04,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2019-09-05 12:46:04,849 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:04,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:46:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:46:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,851 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2019-09-05 12:46:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:04,909 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-09-05 12:46:04,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:46:04,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-09-05 12:46:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:04,912 INFO L225 Difference]: With dead ends: 40 [2019-09-05 12:46:04,912 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:46:04,912 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:46:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-05 12:46:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:46:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-09-05 12:46:04,919 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2019-09-05 12:46:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:04,920 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-09-05 12:46:04,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:46:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-09-05 12:46:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:46:04,921 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:04,922 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:04,922 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 6 times [2019-09-05 12:46:04,923 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:04,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:46:04,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:04,924 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:05,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:05,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:05,033 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 12:46:05,033 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 12:46:05,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:05,034 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:46:05,048 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:46:05,048 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-05 12:46:05,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:46:05,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:46:05,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-05 12:46:05,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:05,081 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:05,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:05,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2019-09-05 12:46:05,159 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:05,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:46:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:46:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:05,161 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2019-09-05 12:46:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:05,221 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-09-05 12:46:05,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:46:05,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-05 12:46:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:05,223 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:46:05,223 INFO L226 Difference]: Without dead ends: 43 [2019-09-05 12:46:05,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:46:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-05 12:46:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-05 12:46:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-05 12:46:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-09-05 12:46:05,228 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-09-05 12:46:05,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:05,228 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-09-05 12:46:05,228 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:46:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-09-05 12:46:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-05 12:46:05,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:05,230 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:05,230 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:05,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 7 times [2019-09-05 12:46:05,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:05,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:05,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:46:05,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:05,232 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 12:46:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 12:46:05,272 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-05 12:46:05,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:05 BoogieIcfgContainer [2019-09-05 12:46:05,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:05,302 INFO L168 Benchmark]: Toolchain (without parser) took 5466.93 ms. Allocated memory was 132.1 MB in the beginning and 263.7 MB in the end (delta: 131.6 MB). Free memory was 87.8 MB in the beginning and 105.9 MB in the end (delta: -18.2 MB). Peak memory consumption was 113.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:05,303 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 106.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:05,304 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.59 ms. Allocated memory is still 132.1 MB. Free memory was 87.3 MB in the beginning and 78.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:05,304 INFO L168 Benchmark]: Boogie Preprocessor took 108.87 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.3 MB in the beginning and 175.6 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:05,305 INFO L168 Benchmark]: RCFGBuilder took 224.65 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 163.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:05,306 INFO L168 Benchmark]: TraceAbstraction took 4894.03 ms. Allocated memory was 198.7 MB in the beginning and 263.7 MB in the end (delta: 65.0 MB). Free memory was 163.3 MB in the beginning and 105.9 MB in the end (delta: 57.3 MB). Peak memory consumption was 122.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:05,310 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 106.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.59 ms. Allocated memory is still 132.1 MB. Free memory was 87.3 MB in the beginning and 78.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.87 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.3 MB in the beginning and 175.6 MB in the end (delta: -97.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 224.65 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 163.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4894.03 ms. Allocated memory was 198.7 MB in the beginning and 263.7 MB in the end (delta: 65.0 MB). Free memory was 163.3 MB in the beginning and 105.9 MB in the end (delta: 57.3 MB). Peak memory consumption was 122.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=2, n=10] [L13] i++ VAL [i=2, n=2, n=10] [L13] COND TRUE i<=n VAL [i=2, n=2, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=4, n=10] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=4, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=10, n=6] [L13] i++ VAL [i=4, n=10, n=6] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=10, n=8] [L13] i++ VAL [i=5, n=8, n=10] [L13] COND TRUE i<=n VAL [i=5, n=8, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=12, n=10] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=10, n=12] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=14, n=10] [L13] COND TRUE i<=n VAL [i=8, n=10, n=14] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [L13] i++ VAL [i=9, n=10, n=16] [L13] COND TRUE i<=n VAL [i=9, n=16, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=10, n=18] [L13] i++ VAL [i=10, n=18, n=10] [L13] COND TRUE i<=n VAL [i=10, n=10, n=18] [L14] COND FALSE !(i<10) VAL [i=10, n=10, n=18] [L13] i++ VAL [i=11, n=10, n=18] [L13] COND FALSE !(i<=n) VAL [i=11, n=18, n=10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 4.8s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 114 SDtfs, 68 SDslu, 319 SDs, 0 SdLazy, 469 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 502 GetRequests, 357 SyntacticMatches, 25 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, 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, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 612 ConstructedInterpolants, 8 QuantifiedInterpolants, 46440 SizeOfPredicates, 14 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 215/1170 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...