/usr/bin/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/Problem16_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:24,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:24,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:24,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:55:24,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:55:24,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:55:24,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:55:24,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:55:24,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:55:24,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:55:24,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:55:24,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:55:24,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:24,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:24,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:24,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:24,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:24,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:24,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:24,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:24,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:24,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:24,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:24,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:24,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:55:24,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:55:24,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:55:24,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:55:24,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:55:24,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:55:24,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:55:24,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:55:24,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:55:24,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:55:24,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:55:24,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:55:24,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:55:24,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:55:24,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:24,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:24,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:24,906 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 [2019-11-06 22:55:24,926 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:24,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:24,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:24,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:24,928 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:24,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:24,929 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:24,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:24,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:24,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:24,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:24,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:24,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:24,932 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:24,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:24,932 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:24,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:24,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:24,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:24,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:24,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:24,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:24,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:24,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:24,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:24,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:24,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:24,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:24,935 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 [2019-11-06 22:55:25,261 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:25,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:25,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:25,280 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:25,280 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:25,282 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-11-06 22:55:25,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babe0f5d4/c29eeea75f9c4fc698de192b87decaef/FLAGe7e788fd8 [2019-11-06 22:55:26,023 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:26,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-11-06 22:55:26,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babe0f5d4/c29eeea75f9c4fc698de192b87decaef/FLAGe7e788fd8 [2019-11-06 22:55:26,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babe0f5d4/c29eeea75f9c4fc698de192b87decaef [2019-11-06 22:55:26,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:26,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:26,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:26,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:26,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:26,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:26" (1/1) ... [2019-11-06 22:55:26,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec017b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:26, skipping insertion in model container [2019-11-06 22:55:26,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:26" (1/1) ... [2019-11-06 22:55:26,221 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:26,289 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:27,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:27,055 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:27,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:27,429 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:27,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27 WrapperNode [2019-11-06 22:55:27,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:27,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:27,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:27,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:27,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (1/1) ... [2019-11-06 22:55:27,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:27,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:27,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:27,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:27,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (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 [2019-11-06 22:55:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:27,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:27,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:27,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:30,076 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:30,076 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:30,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:30 BoogieIcfgContainer [2019-11-06 22:55:30,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:30,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:30,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:30,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:30,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:26" (1/3) ... [2019-11-06 22:55:30,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:30, skipping insertion in model container [2019-11-06 22:55:30,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:27" (2/3) ... [2019-11-06 22:55:30,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8f944f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:30, skipping insertion in model container [2019-11-06 22:55:30,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:30" (3/3) ... [2019-11-06 22:55:30,086 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-11-06 22:55:30,096 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:30,106 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:30,119 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:30,150 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:30,150 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:30,150 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:30,150 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:30,150 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:30,151 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:30,151 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:30,151 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 22:55:30,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:30,192 INFO L410 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, 1, 1, 1, 1] [2019-11-06 22:55:30,194 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1393249942, now seen corresponding path program 1 times [2019-11-06 22:55:30,211 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:30,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588579404] [2019-11-06 22:55:30,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:30,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588579404] [2019-11-06 22:55:30,645 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:30,646 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:55:30,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472437603] [2019-11-06 22:55:30,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:55:30,659 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:55:30,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:30,682 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:55:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:33,222 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:55:33,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:55:33,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-11-06 22:55:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:33,260 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:55:33,260 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:55:33,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:55:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:55:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:55:33,400 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 69 [2019-11-06 22:55:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:33,401 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:55:33,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:55:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:55:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 22:55:33,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:33,419 INFO L410 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, 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] [2019-11-06 22:55:33,419 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:33,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1266997046, now seen corresponding path program 1 times [2019-11-06 22:55:33,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:33,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565665519] [2019-11-06 22:55:33,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:33,724 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565665519] [2019-11-06 22:55:33,724 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:33,724 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:33,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863359958] [2019-11-06 22:55:33,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:33,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:33,727 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-11-06 22:55:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:36,459 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-11-06 22:55:36,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:36,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-11-06 22:55:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:36,467 INFO L225 Difference]: With dead ends: 1730 [2019-11-06 22:55:36,468 INFO L226 Difference]: Without dead ends: 1054 [2019-11-06 22:55:36,470 INFO L630 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 [2019-11-06 22:55:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-06 22:55:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-11-06 22:55:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-11-06 22:55:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-11-06 22:55:36,507 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 161 [2019-11-06 22:55:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:36,508 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-11-06 22:55:36,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-11-06 22:55:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 22:55:36,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:36,512 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:36,512 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 7693126, now seen corresponding path program 1 times [2019-11-06 22:55:36,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:36,513 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360060980] [2019-11-06 22:55:36,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:36,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360060980] [2019-11-06 22:55:36,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588388185] [2019-11-06 22:55:36,751 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 [2019-11-06 22:55:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:36,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:36,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:55:37,077 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 124 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:37,323 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:37,324 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:37,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207089090] [2019-11-06 22:55:37,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:37,331 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:37,333 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-11-06 22:55:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:39,876 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-11-06 22:55:39,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:39,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2019-11-06 22:55:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:39,885 INFO L225 Difference]: With dead ends: 2427 [2019-11-06 22:55:39,886 INFO L226 Difference]: Without dead ends: 1399 [2019-11-06 22:55:39,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 537 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-11-06 22:55:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-11-06 22:55:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-11-06 22:55:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-11-06 22:55:39,928 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 271 [2019-11-06 22:55:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:39,929 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-11-06 22:55:39,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-11-06 22:55:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-11-06 22:55:39,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:39,934 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:40,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:40,148 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 979494015, now seen corresponding path program 1 times [2019-11-06 22:55:40,149 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:40,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525550179] [2019-11-06 22:55:40,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 186 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:40,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525550179] [2019-11-06 22:55:40,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125308959] [2019-11-06 22:55:40,402 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 [2019-11-06 22:55:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:40,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:40,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-11-06 22:55:40,659 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 186 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:40,834 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:40,834 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:55:40,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036298485] [2019-11-06 22:55:40,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:40,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:40,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:40,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:55:40,836 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-11-06 22:55:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:44,705 INFO L93 Difference]: Finished difference Result 4243 states and 6811 transitions. [2019-11-06 22:55:44,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:55:44,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 346 [2019-11-06 22:55:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:44,728 INFO L225 Difference]: With dead ends: 4243 [2019-11-06 22:55:44,728 INFO L226 Difference]: Without dead ends: 2861 [2019-11-06 22:55:44,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 690 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:55:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2019-11-06 22:55:44,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2819. [2019-11-06 22:55:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-11-06 22:55:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4287 transitions. [2019-11-06 22:55:44,842 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4287 transitions. Word has length 346 [2019-11-06 22:55:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:44,843 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4287 transitions. [2019-11-06 22:55:44,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4287 transitions. [2019-11-06 22:55:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2019-11-06 22:55:44,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:44,851 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:45,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:45,057 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1792266937, now seen corresponding path program 1 times [2019-11-06 22:55:45,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:45,059 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266799070] [2019-11-06 22:55:45,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 186 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:45,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266799070] [2019-11-06 22:55:45,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261543991] [2019-11-06 22:55:45,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 22:55:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:45,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:45,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-11-06 22:55:45,559 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 186 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:55:45,714 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:45,714 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:45,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569801798] [2019-11-06 22:55:45,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:45,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:45,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:45,717 INFO L87 Difference]: Start difference. First operand 2819 states and 4287 transitions. Second operand 5 states. [2019-11-06 22:55:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:48,622 INFO L93 Difference]: Finished difference Result 8487 states and 13372 transitions. [2019-11-06 22:55:48,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:55:48,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 350 [2019-11-06 22:55:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:48,662 INFO L225 Difference]: With dead ends: 8487 [2019-11-06 22:55:48,663 INFO L226 Difference]: Without dead ends: 5674 [2019-11-06 22:55:48,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 695 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-11-06 22:55:48,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-11-06 22:55:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-11-06 22:55:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7785 transitions. [2019-11-06 22:55:48,839 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7785 transitions. Word has length 350 [2019-11-06 22:55:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:48,839 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7785 transitions. [2019-11-06 22:55:48,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7785 transitions. [2019-11-06 22:55:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-11-06 22:55:48,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:48,849 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:55:49,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:49,061 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash -353311870, now seen corresponding path program 1 times [2019-11-06 22:55:49,063 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:49,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159192542] [2019-11-06 22:55:49,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:49,497 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-11-06 22:55:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:50,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159192542] [2019-11-06 22:55:50,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010881373] [2019-11-06 22:55:50,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:50,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:50,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:50,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 213 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:50,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [443583974] [2019-11-06 22:55:50,964 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 376 [2019-11-06 22:55:51,033 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:51,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:55,725 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.