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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:13,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:13,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:13,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:13,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:13,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:13,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:13,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:13,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:13,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:13,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:13,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:13,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:13,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:13,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:13,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:13,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:13,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:13,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:13,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:13,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:13,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:13,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:13,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:13,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:06:13,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:13,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:13,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:13,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:06:13,795 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:13,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:13,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:13,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:13,801 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:13,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:13,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:13,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:13,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:13,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:13,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:13,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:13,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:13,805 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:13,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:13,806 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:13,806 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:13,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:13,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:13,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:13,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:13,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:13,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:13,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:13,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:13,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:13,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:13,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:13,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:06:14,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:14,100 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:14,104 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:14,106 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:14,107 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:14,107 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-15 01:06:14,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65beaea8/062578dd5d9d46c78d35d45d40de05ab/FLAG0d6dd852b [2019-10-15 01:06:14,599 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:14,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-15 01:06:14,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65beaea8/062578dd5d9d46c78d35d45d40de05ab/FLAG0d6dd852b [2019-10-15 01:06:14,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65beaea8/062578dd5d9d46c78d35d45d40de05ab [2019-10-15 01:06:14,980 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:14,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:14,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:14,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:14,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:14,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:14" (1/1) ... [2019-10-15 01:06:14,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364da557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:14, skipping insertion in model container [2019-10-15 01:06:14,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:14" (1/1) ... [2019-10-15 01:06:14,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:15,018 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:15,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:15,240 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:15,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:15,278 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:15,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15 WrapperNode [2019-10-15 01:06:15,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:15,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:15,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:15,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:15,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (1/1) ... [2019-10-15 01:06:15,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:15,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:15,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:15,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:15,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (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 [2019-10-15 01:06:15,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:15,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:15,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:15,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:06:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:15,632 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:15,632 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:15,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:15 BoogieIcfgContainer [2019-10-15 01:06:15,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:15,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:15,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:15,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:15,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:14" (1/3) ... [2019-10-15 01:06:15,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1dc39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:15, skipping insertion in model container [2019-10-15 01:06:15,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:15" (2/3) ... [2019-10-15 01:06:15,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1dc39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:15, skipping insertion in model container [2019-10-15 01:06:15,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:15" (3/3) ... [2019-10-15 01:06:15,659 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-10-15 01:06:15,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:15,686 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:15,706 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:15,750 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:15,750 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:15,750 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:15,750 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:15,750 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:15,751 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:15,751 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:15,751 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:06:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:15,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:15,792 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:15,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:15,803 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-10-15 01:06:15,813 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:15,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116703253] [2019-10-15 01:06:15,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:15,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:15,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:15,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116703253] [2019-10-15 01:06:15,916 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:15,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:15,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119437463] [2019-10-15 01:06:15,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:15,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:15,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:15,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:15,936 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-15 01:06:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:15,956 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:06:15,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:15,958 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:06:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:15,966 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:06:15,967 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 01:06:15,970 INFO L600 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 [2019-10-15 01:06:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 01:06:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-15 01:06:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-15 01:06:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-15 01:06:16,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-15 01:06:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:16,008 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-15 01:06:16,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-15 01:06:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:16,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:16,010 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:16,010 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-10-15 01:06:16,011 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:16,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50010756] [2019-10-15 01:06:16,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50010756] [2019-10-15 01:06:16,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:16,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:06:16,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212591185] [2019-10-15 01:06:16,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:16,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:16,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:16,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:06:16,116 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-10-15 01:06:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:16,160 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-15 01:06:16,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:06:16,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-15 01:06:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:16,162 INFO L225 Difference]: With dead ends: 19 [2019-10-15 01:06:16,163 INFO L226 Difference]: Without dead ends: 14 [2019-10-15 01:06:16,164 INFO L600 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 [2019-10-15 01:06:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-15 01:06:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-15 01:06:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 01:06:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-15 01:06:16,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-10-15 01:06:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:16,170 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-15 01:06:16,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-15 01:06:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:06:16,171 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:16,171 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:16,172 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2019-10-15 01:06:16,173 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:16,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423656162] [2019-10-15 01:06:16,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:16,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423656162] [2019-10-15 01:06:16,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654652018] [2019-10-15 01:06:16,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:16,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:06:16,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:16,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:16,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [885748278] [2019-10-15 01:06:16,828 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 14 [2019-10-15 01:06:16,858 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:16,859 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:16,928 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:06:17,050 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:17,061 INFO L272 AbstractInterpreter]: Visited 13 different actions 53 times. Merged at 4 different actions 20 times. Widened at 1 different actions 3 times. Performed 86 root evaluator evaluations with a maximum evaluation depth of 6. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-10-15 01:06:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:17,066 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:17,067 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:06:17,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2019-10-15 01:06:17,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654099274] [2019-10-15 01:06:17,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:06:17,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:06:17,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:06:17,070 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 18 states. [2019-10-15 01:06:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:17,280 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-10-15 01:06:17,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:06:17,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-10-15 01:06:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:17,281 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:06:17,281 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:06:17,283 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:06:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:06:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-15 01:06:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:06:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:06:17,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-10-15 01:06:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:17,289 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:06:17,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:06:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:06:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:06:17,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:17,290 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:17,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:17,494 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:17,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2019-10-15 01:06:17,495 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:17,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996969006] [2019-10-15 01:06:17,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:17,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:17,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:17,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996969006] [2019-10-15 01:06:17,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308809118] [2019-10-15 01:06:17,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:17,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:06:17,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:17,575 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:17,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1140071991] [2019-10-15 01:06:17,600 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 17 [2019-10-15 01:06:17,602 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:06:17,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:06:17,604 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:06:17,674 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:06:17,675 INFO L272 AbstractInterpreter]: Visited 14 different actions 69 times. Merged at 5 different actions 25 times. Widened at 1 different actions 4 times. Performed 120 root evaluator evaluations with a maximum evaluation depth of 6. Performed 120 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 2 different actions. Largest state had 5 variables. [2019-10-15 01:06:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:17,675 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:17,676 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:06:17,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2019-10-15 01:06:17,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078130701] [2019-10-15 01:06:17,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:06:17,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:06:17,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:06:17,682 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2019-10-15 01:06:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:17,735 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:06:17,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:06:17,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-15 01:06:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:17,739 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:06:17,739 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:06:17,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:06:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:06:17,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-15 01:06:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:06:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-15 01:06:17,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-10-15 01:06:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:17,749 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-15 01:06:17,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:06:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-15 01:06:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:06:17,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:17,751 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:17,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:17,963 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2019-10-15 01:06:17,963 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:17,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646292104] [2019-10-15 01:06:17,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:17,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:17,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:06:18,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646292104] [2019-10-15 01:06:18,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514919394] [2019-10-15 01:06:18,176 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:18,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:06:18,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:06:18,219 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-15 01:06:18,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:18,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:18,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:18,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [319020461] [2019-10-15 01:06:18,720 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:06:18,720 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:06:18,720 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:06:18,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2019-10-15 01:06:18,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058645060] [2019-10-15 01:06:18,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 01:06:18,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:18,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 01:06:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:06:18,723 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 27 states. [2019-10-15 01:06:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:19,174 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-10-15 01:06:19,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:06:19,175 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 19 [2019-10-15 01:06:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:19,176 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:06:19,176 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:06:19,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:06:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:06:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-10-15 01:06:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:06:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:06:19,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-10-15 01:06:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:19,183 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:06:19,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 01:06:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:06:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:06:19,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:19,184 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:19,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:19,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2019-10-15 01:06:19,390 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:19,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727076778] [2019-10-15 01:06:19,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:19,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:19,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:06:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:06:19,433 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-15 01:06:19,434 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 01:06:19,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:06:19 BoogieIcfgContainer [2019-10-15 01:06:19,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:06:19,473 INFO L168 Benchmark]: Toolchain (without parser) took 4486.21 ms. Allocated memory was 146.3 MB in the beginning and 242.2 MB in the end (delta: 95.9 MB). Free memory was 103.5 MB in the beginning and 135.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:19,474 INFO L168 Benchmark]: CDTParser took 1.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-15 01:06:19,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.69 ms. Allocated memory is still 146.3 MB. Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:19,477 INFO L168 Benchmark]: Boogie Preprocessor took 118.22 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 94.1 MB in the beginning and 182.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:19,479 INFO L168 Benchmark]: RCFGBuilder took 235.93 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 171.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:19,480 INFO L168 Benchmark]: TraceAbstraction took 3830.85 ms. Allocated memory was 203.4 MB in the beginning and 242.2 MB in the end (delta: 38.8 MB). Free memory was 171.4 MB in the beginning and 135.4 MB in the end (delta: 36.0 MB). Peak memory consumption was 74.8 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:19,488 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.69 ms. Allocated memory is still 146.3 MB. Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.22 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 94.1 MB in the beginning and 182.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 235.93 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 171.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3830.85 ms. Allocated memory was 203.4 MB in the beginning and 242.2 MB in the end (delta: 38.8 MB). Free memory was 171.4 MB in the beginning and 135.4 MB in the end (delta: 36.0 MB). Peak memory consumption was 74.8 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=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=2, n=4] [L15] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=6, n=4] [L15] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=4, n=8] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=-10, n=4] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, 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. Result: UNSAFE, OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 34 SDslu, 217 SDs, 0 SdLazy, 317 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 153 ConstructedInterpolants, 0 QuantifiedInterpolants, 14031 SizeOfPredicates, 9 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 14/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...