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/eca-rers2012/Problem10_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:02:35,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:02:35,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:02:35,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:02:35,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:02:35,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:02:35,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:02:35,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:02:35,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:02:35,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:02:35,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:02:35,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:02:35,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:02:35,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:02:35,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:02:35,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:02:35,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:02:35,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:02:35,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:02:35,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:02:35,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:02:35,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:02:35,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:02:35,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:02:35,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:02:35,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:02:35,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:02:35,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:02:35,953 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 [2019-10-13 20:02:35,971 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:02:35,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:02:35,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:02:35,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:02:35,974 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:02:35,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:02:35,975 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:02:35,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:02:35,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:02:35,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:02:35,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:02:35,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:02:35,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:02:35,977 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:02:35,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:02:35,977 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:02:35,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:02:35,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:02:35,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:02:35,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:02:35,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:02:35,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:02:35,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:02:35,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:02:35,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:02:35,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:02:35,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:02:35,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:02:35,980 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 [2019-10-13 20:02:36,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:02:36,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:02:36,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:02:36,262 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:02:36,263 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:02:36,264 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label29.c [2019-10-13 20:02:36,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba6634ae/7824d00401824dd38790f4a4d316a3ce/FLAG922059229 [2019-10-13 20:02:36,910 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:02:36,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label29.c [2019-10-13 20:02:36,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba6634ae/7824d00401824dd38790f4a4d316a3ce/FLAG922059229 [2019-10-13 20:02:37,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba6634ae/7824d00401824dd38790f4a4d316a3ce [2019-10-13 20:02:37,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:02:37,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:02:37,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:02:37,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:02:37,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:02:37,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:37,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3457a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37, skipping insertion in model container [2019-10-13 20:02:37,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:37,203 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:02:37,265 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:02:37,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:02:37,780 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:02:37,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:02:37,939 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:02:37,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37 WrapperNode [2019-10-13 20:02:37,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:02:37,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:02:37,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:02:37,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:02:37,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:37,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:37,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:37,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:38,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:38,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:38,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (1/1) ... [2019-10-13 20:02:38,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:02:38,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:02:38,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:02:38,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:02:38,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (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 [2019-10-13 20:02:38,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:02:38,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:02:38,151 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:02:38,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:02:38,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:02:38,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:02:38,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:02:38,153 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:02:38,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:02:38,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:02:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:02:39,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:02:39,583 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:02:39,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:39 BoogieIcfgContainer [2019-10-13 20:02:39,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:02:39,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:02:39,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:02:39,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:02:39,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:02:37" (1/3) ... [2019-10-13 20:02:39,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693f9502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:39, skipping insertion in model container [2019-10-13 20:02:39,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:37" (2/3) ... [2019-10-13 20:02:39,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693f9502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:39, skipping insertion in model container [2019-10-13 20:02:39,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:39" (3/3) ... [2019-10-13 20:02:39,594 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label29.c [2019-10-13 20:02:39,604 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:02:39,614 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:02:39,625 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:02:39,666 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:02:39,666 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:02:39,667 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:02:39,667 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:02:39,667 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:02:39,667 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:02:39,669 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:02:39,669 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:02:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:02:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 20:02:39,707 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:39,708 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:39,709 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1961965038, now seen corresponding path program 1 times [2019-10-13 20:02:39,721 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:39,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531632200] [2019-10-13 20:02:39,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:39,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:39,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:39,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531632200] [2019-10-13 20:02:40,000 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:40,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:02:40,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232823979] [2019-10-13 20:02:40,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:02:40,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:40,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:02:40,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:02:40,026 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-13 20:02:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:41,067 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-13 20:02:41,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:02:41,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-13 20:02:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:41,102 INFO L225 Difference]: With dead ends: 571 [2019-10-13 20:02:41,103 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 20:02:41,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:02:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 20:02:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-13 20:02:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:02:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-13 20:02:41,228 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 21 [2019-10-13 20:02:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:41,229 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-13 20:02:41,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:02:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-13 20:02:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 20:02:41,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:41,241 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:41,241 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:41,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -61181822, now seen corresponding path program 1 times [2019-10-13 20:02:41,243 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:41,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366331728] [2019-10-13 20:02:41,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:41,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:41,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:41,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366331728] [2019-10-13 20:02:41,559 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:41,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:02:41,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727775893] [2019-10-13 20:02:41,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:02:41,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:02:41,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:02:41,562 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-13 20:02:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:42,604 INFO L93 Difference]: Finished difference Result 888 states and 1367 transitions. [2019-10-13 20:02:42,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:02:42,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-10-13 20:02:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:42,611 INFO L225 Difference]: With dead ends: 888 [2019-10-13 20:02:42,611 INFO L226 Difference]: Without dead ends: 600 [2019-10-13 20:02:42,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:02:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-13 20:02:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 447. [2019-10-13 20:02:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2019-10-13 20:02:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 661 transitions. [2019-10-13 20:02:42,644 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 661 transitions. Word has length 103 [2019-10-13 20:02:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:42,644 INFO L462 AbstractCegarLoop]: Abstraction has 447 states and 661 transitions. [2019-10-13 20:02:42,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:02:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 661 transitions. [2019-10-13 20:02:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 20:02:42,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:42,647 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:42,648 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:42,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 711851938, now seen corresponding path program 1 times [2019-10-13 20:02:42,649 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:42,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953146665] [2019-10-13 20:02:42,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:42,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:42,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:42,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953146665] [2019-10-13 20:02:42,889 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:42,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:02:42,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21961071] [2019-10-13 20:02:42,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:02:42,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:42,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:02:42,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:02:42,891 INFO L87 Difference]: Start difference. First operand 447 states and 661 transitions. Second operand 6 states. [2019-10-13 20:02:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:43,859 INFO L93 Difference]: Finished difference Result 1200 states and 1824 transitions. [2019-10-13 20:02:43,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:43,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-13 20:02:43,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:43,871 INFO L225 Difference]: With dead ends: 1200 [2019-10-13 20:02:43,871 INFO L226 Difference]: Without dead ends: 759 [2019-10-13 20:02:43,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:02:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2019-10-13 20:02:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 745. [2019-10-13 20:02:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-13 20:02:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1096 transitions. [2019-10-13 20:02:43,915 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1096 transitions. Word has length 119 [2019-10-13 20:02:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:43,915 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 1096 transitions. [2019-10-13 20:02:43,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:02:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1096 transitions. [2019-10-13 20:02:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 20:02:43,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:43,919 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:43,920 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -457664942, now seen corresponding path program 1 times [2019-10-13 20:02:43,921 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:43,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922455130] [2019-10-13 20:02:43,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:43,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:43,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:44,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922455130] [2019-10-13 20:02:44,105 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:02:44,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:02:44,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995227911] [2019-10-13 20:02:44,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:02:44,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:02:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:02:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:02:44,107 INFO L87 Difference]: Start difference. First operand 745 states and 1096 transitions. Second operand 6 states. [2019-10-13 20:02:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:02:44,941 INFO L93 Difference]: Finished difference Result 1814 states and 2766 transitions. [2019-10-13 20:02:44,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:02:44,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-13 20:02:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:02:44,955 INFO L225 Difference]: With dead ends: 1814 [2019-10-13 20:02:44,956 INFO L226 Difference]: Without dead ends: 1075 [2019-10-13 20:02:44,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:02:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2019-10-13 20:02:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1047. [2019-10-13 20:02:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2019-10-13 20:02:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1430 transitions. [2019-10-13 20:02:45,022 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1430 transitions. Word has length 143 [2019-10-13 20:02:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:02:45,023 INFO L462 AbstractCegarLoop]: Abstraction has 1047 states and 1430 transitions. [2019-10-13 20:02:45,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:02:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1430 transitions. [2019-10-13 20:02:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 20:02:45,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:02:45,035 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:02:45,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:02:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:02:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1615029563, now seen corresponding path program 1 times [2019-10-13 20:02:45,036 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:02:45,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393143104] [2019-10-13 20:02:45,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:45,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:02:45,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:02:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:45,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393143104] [2019-10-13 20:02:45,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87466797] [2019-10-13 20:02:45,559 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 [2019-10-13 20:02:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:02:45,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:02:45,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:02:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:45,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:02:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:02:46,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [274647921] [2019-10-13 20:02:46,059 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 183 [2019-10-13 20:02:46,153 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:02:46,153 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:02:58,301 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 20:03:14,128 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:03:14,130 INFO L272 AbstractInterpreter]: Visited 90 different actions 173 times. Merged at 3 different actions 3 times. Never widened. Performed 308 root evaluator evaluations with a maximum evaluation depth of 16. Performed 308 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:03:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:14,135 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates