/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/Problem11_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:34,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:34,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:34,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:47:34,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:47:34,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:47:34,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:47:34,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:47:34,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:47:34,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:47:34,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:47:34,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:47:34,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:47:34,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:47:34,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:47:34,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:47:34,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:47:34,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:47:35,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:47:35,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:47:35,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:47:35,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:47:35,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:47:35,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:47:35,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:47:35,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:47:35,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:47:35,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:47:35,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:47:35,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:47:35,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:47:35,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:47:35,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:47:35,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:47:35,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:47:35,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:47:35,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:47:35,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:47:35,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:35,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:35,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:35,030 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 22:47:35,046 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:35,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:35,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:35,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:35,047 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:35,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:35,048 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:35,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:35,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:35,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:35,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:35,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:35,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:35,049 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:35,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:35,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:35,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:35,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:35,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:35,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:35,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:35,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:35,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:35,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:35,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:35,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:35,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:35,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:35,052 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 22:47:35,336 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:35,356 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:35,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:35,362 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:35,363 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:35,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label49.c [2019-11-06 22:47:35,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ba639b21/0de5390ca7ff41f4a9126702dfc2fc79/FLAGa90d84af4 [2019-11-06 22:47:36,000 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:36,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label49.c [2019-11-06 22:47:36,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ba639b21/0de5390ca7ff41f4a9126702dfc2fc79/FLAGa90d84af4 [2019-11-06 22:47:36,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ba639b21/0de5390ca7ff41f4a9126702dfc2fc79 [2019-11-06 22:47:36,274 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:36,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:36,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:36,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:36,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:36,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f087c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:36, skipping insertion in model container [2019-11-06 22:47:36,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:36" (1/1) ... [2019-11-06 22:47:36,293 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:36,353 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:36,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:36,985 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:37,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:37,258 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:37,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37 WrapperNode [2019-11-06 22:47:37,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:37,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:37,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:37,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:37,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (1/1) ... [2019-11-06 22:47:37,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:37,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:37,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:37,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:37,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (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 [2019-11-06 22:47:37,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:37,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:37,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:37,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:37,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:39,372 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:39,373 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:39,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:39 BoogieIcfgContainer [2019-11-06 22:47:39,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:39,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:39,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:39,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:39,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:36" (1/3) ... [2019-11-06 22:47:39,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfb2d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:39, skipping insertion in model container [2019-11-06 22:47:39,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:37" (2/3) ... [2019-11-06 22:47:39,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfb2d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:39, skipping insertion in model container [2019-11-06 22:47:39,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:39" (3/3) ... [2019-11-06 22:47:39,388 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label49.c [2019-11-06 22:47:39,402 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:39,412 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:39,425 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:39,473 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:39,473 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:39,474 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:39,474 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:39,474 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:39,475 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:39,475 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:39,475 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 22:47:39,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:39,578 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] [2019-11-06 22:47:39,580 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash 757493474, now seen corresponding path program 1 times [2019-11-06 22:47:39,603 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:39,603 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797746426] [2019-11-06 22:47:39,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:39,923 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 22:47:39,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797746426] [2019-11-06 22:47:39,924 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:39,925 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:39,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150923227] [2019-11-06 22:47:39,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:39,933 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:39,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:39,950 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:47:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:42,177 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-11-06 22:47:42,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:42,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 22:47:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:42,222 INFO L225 Difference]: With dead ends: 975 [2019-11-06 22:47:42,223 INFO L226 Difference]: Without dead ends: 616 [2019-11-06 22:47:42,237 INFO L630 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 [2019-11-06 22:47:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-11-06 22:47:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-11-06 22:47:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-11-06 22:47:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-11-06 22:47:42,318 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 25 [2019-11-06 22:47:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:42,318 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-11-06 22:47:42,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-11-06 22:47:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 22:47:42,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:42,324 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:42,324 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash 673230146, now seen corresponding path program 1 times [2019-11-06 22:47:42,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:42,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746290257] [2019-11-06 22:47:42,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:42,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746290257] [2019-11-06 22:47:42,590 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:42,591 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:47:42,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780493902] [2019-11-06 22:47:42,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:47:42,593 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:42,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:47:42,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:47:42,594 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-11-06 22:47:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:44,193 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-11-06 22:47:44,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:44,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-11-06 22:47:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:44,202 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:47:44,202 INFO L226 Difference]: Without dead ends: 825 [2019-11-06 22:47:44,204 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 22:47:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-11-06 22:47:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-11-06 22:47:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-11-06 22:47:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-11-06 22:47:44,252 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 97 [2019-11-06 22:47:44,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:44,252 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-11-06 22:47:44,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:47:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-11-06 22:47:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:47:44,256 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:44,257 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:44,257 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1465736335, now seen corresponding path program 1 times [2019-11-06 22:47:44,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:44,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337062908] [2019-11-06 22:47:44,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337062908] [2019-11-06 22:47:44,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950239140] [2019-11-06 22:47:44,508 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 22:47:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:44,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:47:44,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:44,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:44,756 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:44,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:44,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:44,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:44,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:44,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:44,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:44,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:44,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:44,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:45,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:45,160 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:45,160 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-06 22:47:45,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729343896] [2019-11-06 22:47:45,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:47:45,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:45,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:47:45,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:47:45,163 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 7 states. [2019-11-06 22:47:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:47,541 INFO L93 Difference]: Finished difference Result 2829 states and 4164 transitions. [2019-11-06 22:47:47,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:47:47,541 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 98 [2019-11-06 22:47:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:47,559 INFO L225 Difference]: With dead ends: 2829 [2019-11-06 22:47:47,560 INFO L226 Difference]: Without dead ends: 2021 [2019-11-06 22:47:47,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-11-06 22:47:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2019-11-06 22:47:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1992. [2019-11-06 22:47:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2019-11-06 22:47:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2629 transitions. [2019-11-06 22:47:47,680 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2629 transitions. Word has length 98 [2019-11-06 22:47:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:47,680 INFO L462 AbstractCegarLoop]: Abstraction has 1992 states and 2629 transitions. [2019-11-06 22:47:47,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:47:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2629 transitions. [2019-11-06 22:47:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:47:47,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:47,691 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:47:47,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:47,895 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1390346086, now seen corresponding path program 1 times [2019-11-06 22:47:47,897 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:47,897 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451318649] [2019-11-06 22:47:47,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:48,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451318649] [2019-11-06 22:47:48,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060717935] [2019-11-06 22:47:48,176 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 22:47:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:48,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:47:48,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:48,348 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:48,391 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:48,391 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-06 22:47:48,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676430069] [2019-11-06 22:47:48,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:48,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:47:48,396 INFO L87 Difference]: Start difference. First operand 1992 states and 2629 transitions. Second operand 4 states. [2019-11-06 22:47:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:49,991 INFO L93 Difference]: Finished difference Result 5541 states and 7566 transitions. [2019-11-06 22:47:49,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:49,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-11-06 22:47:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:50,011 INFO L225 Difference]: With dead ends: 5541 [2019-11-06 22:47:50,011 INFO L226 Difference]: Without dead ends: 3555 [2019-11-06 22:47:50,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:47:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2019-11-06 22:47:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2965. [2019-11-06 22:47:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2019-11-06 22:47:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3974 transitions. [2019-11-06 22:47:50,102 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3974 transitions. Word has length 156 [2019-11-06 22:47:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:50,103 INFO L462 AbstractCegarLoop]: Abstraction has 2965 states and 3974 transitions. [2019-11-06 22:47:50,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3974 transitions. [2019-11-06 22:47:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 22:47:50,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:50,107 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:47:50,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:50,312 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash -330242703, now seen corresponding path program 1 times [2019-11-06 22:47:50,313 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:50,314 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280798422] [2019-11-06 22:47:50,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:47:50,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280798422] [2019-11-06 22:47:50,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128445267] [2019-11-06 22:47:50,587 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 22:47:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:50,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:47:50,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:50,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:50,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:50,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:47:51,653 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:51,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:51,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:51,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:51,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:51,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1992515861] [2019-11-06 22:47:51,797 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 226 [2019-11-06 22:47:51,857 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:51,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)