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/Problem14_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:34,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:34,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:34,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:34,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:34,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:34,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:34,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:34,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:34,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:34,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:34,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:34,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:34,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:34,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:34,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:34,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:34,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:34,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:34,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:34,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:34,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:34,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:34,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:34,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:34,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:34,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:34,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:34,889 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 00:06:34,906 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:34,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:34,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:34,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:34,908 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:34,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:34,908 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:34,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:34,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:34,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:34,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:34,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:34,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:34,909 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:34,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:34,910 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:34,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:34,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:34,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:34,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:34,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:34,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:34,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:34,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:34,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:34,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:34,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:34,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:34,913 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 00:06:35,216 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:35,230 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:35,233 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:35,235 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:35,235 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:35,236 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label49.c [2019-10-15 00:06:35,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbc9c09c/c0e1decebd2945de8d34960bd05c3c44/FLAG116d908a8 [2019-10-15 00:06:35,883 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:35,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label49.c [2019-10-15 00:06:35,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbc9c09c/c0e1decebd2945de8d34960bd05c3c44/FLAG116d908a8 [2019-10-15 00:06:36,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbc9c09c/c0e1decebd2945de8d34960bd05c3c44 [2019-10-15 00:06:36,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:36,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:36,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:36,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:36,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:36,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:36" (1/1) ... [2019-10-15 00:06:36,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e616d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:36, skipping insertion in model container [2019-10-15 00:06:36,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:36" (1/1) ... [2019-10-15 00:06:36,191 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:36,261 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:36,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:36,855 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:37,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:37,125 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:37,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37 WrapperNode [2019-10-15 00:06:37,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:37,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:37,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:37,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:37,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (1/1) ... [2019-10-15 00:06:37,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:37,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:37,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:37,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:37,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (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 [2019-10-15 00:06:37,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:37,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:37,396 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:37,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:37,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:37,398 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:37,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:37,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:37,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:39,023 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:39,027 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:39,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:39 BoogieIcfgContainer [2019-10-15 00:06:39,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:39,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:39,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:39,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:39,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:36" (1/3) ... [2019-10-15 00:06:39,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e3ba8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:39, skipping insertion in model container [2019-10-15 00:06:39,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:37" (2/3) ... [2019-10-15 00:06:39,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e3ba8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:39, skipping insertion in model container [2019-10-15 00:06:39,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:39" (3/3) ... [2019-10-15 00:06:39,047 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label49.c [2019-10-15 00:06:39,057 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:39,066 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:39,078 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:39,119 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:39,120 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:39,120 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:39,120 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:39,121 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:39,121 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:39,121 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:39,121 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 00:06:39,164 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:39,166 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, 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] [2019-10-15 00:06:39,167 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -989018502, now seen corresponding path program 1 times [2019-10-15 00:06:39,183 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:39,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620985590] [2019-10-15 00:06:39,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:39,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:39,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:39,550 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 00:06:39,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620985590] [2019-10-15 00:06:39,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:39,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:39,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289182066] [2019-10-15 00:06:39,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:39,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:39,577 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:06:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:41,393 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-15 00:06:41,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:41,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-10-15 00:06:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:41,415 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:06:41,416 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:06:41,425 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:06:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-15 00:06:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-15 00:06:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-10-15 00:06:41,527 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 65 [2019-10-15 00:06:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:41,528 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-10-15 00:06:41,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-10-15 00:06:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 00:06:41,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:41,539 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 00:06:41,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2034317014, now seen corresponding path program 1 times [2019-10-15 00:06:41,541 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:41,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978360687] [2019-10-15 00:06:41,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:41,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:41,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:41,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978360687] [2019-10-15 00:06:41,824 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:41,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:41,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727948643] [2019-10-15 00:06:41,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:41,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:41,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:41,828 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-10-15 00:06:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:43,435 INFO L93 Difference]: Finished difference Result 2194 states and 3132 transitions. [2019-10-15 00:06:43,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:43,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2019-10-15 00:06:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:43,450 INFO L225 Difference]: With dead ends: 2194 [2019-10-15 00:06:43,450 INFO L226 Difference]: Without dead ends: 1646 [2019-10-15 00:06:43,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-15 00:06:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1464. [2019-10-15 00:06:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-10-15 00:06:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1994 transitions. [2019-10-15 00:06:43,535 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1994 transitions. Word has length 177 [2019-10-15 00:06:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:43,536 INFO L462 AbstractCegarLoop]: Abstraction has 1464 states and 1994 transitions. [2019-10-15 00:06:43,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1994 transitions. [2019-10-15 00:06:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-15 00:06:43,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:43,548 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-15 00:06:43,548 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1543638766, now seen corresponding path program 1 times [2019-10-15 00:06:43,549 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:43,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929532251] [2019-10-15 00:06:43,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:43,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:43,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:43,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929532251] [2019-10-15 00:06:43,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213396609] [2019-10-15 00:06:43,850 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 00:06:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:43,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:06:43,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:44,158 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:44,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1997037075] [2019-10-15 00:06:44,336 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 260 [2019-10-15 00:06:44,395 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:44,395 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:53,245 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:53,247 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Performed 271 root evaluator evaluations with a maximum evaluation depth of 13. Performed 271 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:06:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:53,255 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:07:00,967 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 78.28% of their original sizes. [2019-10-15 00:07:00,968 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:07:01,076 INFO L553 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2019-10-15 00:07:01,076 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:07:01,077 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:07:01,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 20 [2019-10-15 00:07:01,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589836764] [2019-10-15 00:07:01,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:07:01,080 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:01,080 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:07:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:07:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:01,081 INFO L87 Difference]: Start difference. First operand 1464 states and 1994 transitions. Second operand 11 states.