/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/Problem03_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:37:39,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:37:39,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:37:39,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:37:40,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:37:40,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:37:40,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:37:40,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:37:40,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:37:40,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:37:40,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:37:40,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:37:40,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:37:40,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:37:40,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:37:40,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:37:40,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:37:40,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:37:40,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:37:40,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:37:40,035 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 22:37:40,048 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:37:40,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:37:40,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:37:40,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:37:40,050 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:37:40,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:37:40,051 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:37:40,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:37:40,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:37:40,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:37:40,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:37:40,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:37:40,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:37:40,052 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:37:40,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:37:40,052 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:37:40,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:37:40,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:37:40,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:37:40,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:37:40,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:37:40,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:37:40,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:37:40,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:37:40,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:37:40,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:37:40,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:37:40,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:37:40,055 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 22:37:40,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:37:40,362 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:37:40,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:37:40,367 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:37:40,367 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:37:40,368 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2019-11-06 22:37:40,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a008612f1/f4cd03f936a8422a8110c076c5daab7c/FLAG853268b6f [2019-11-06 22:37:41,079 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:37:41,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label16.c [2019-11-06 22:37:41,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a008612f1/f4cd03f936a8422a8110c076c5daab7c/FLAG853268b6f [2019-11-06 22:37:41,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a008612f1/f4cd03f936a8422a8110c076c5daab7c [2019-11-06 22:37:41,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:37:41,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:37:41,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:41,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:37:41,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:37:41,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:41" (1/1) ... [2019-11-06 22:37:41,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d77f0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:41, skipping insertion in model container [2019-11-06 22:37:41,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:41" (1/1) ... [2019-11-06 22:37:41,277 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:37:41,360 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:37:42,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:42,257 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:37:42,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:42,560 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:37:42,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42 WrapperNode [2019-11-06 22:37:42,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:42,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:37:42,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:37:42,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:37:42,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (1/1) ... [2019-11-06 22:37:42,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:37:42,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:37:42,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:37:42,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:37:42,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (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 22:37:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:37:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:37:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:37:42,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:37:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:37:44,772 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:37:44,772 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:37:44,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:44 BoogieIcfgContainer [2019-11-06 22:37:44,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:37:44,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:37:44,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:37:44,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:37:44,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:41" (1/3) ... [2019-11-06 22:37:44,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c537593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:44, skipping insertion in model container [2019-11-06 22:37:44,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:42" (2/3) ... [2019-11-06 22:37:44,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c537593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:44, skipping insertion in model container [2019-11-06 22:37:44,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:44" (3/3) ... [2019-11-06 22:37:44,783 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2019-11-06 22:37:44,793 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:37:44,802 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:37:44,815 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:37:44,857 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:37:44,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:37:44,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:37:44,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:37:44,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:37:44,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:37:44,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:37:44,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:37:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:37:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 22:37:44,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:44,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:44,926 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:44,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1544332784, now seen corresponding path program 1 times [2019-11-06 22:37:44,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:44,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764938504] [2019-11-06 22:37:44,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:45,647 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 22:37:45,648 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764938504] [2019-11-06 22:37:45,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:45,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:45,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523194186] [2019-11-06 22:37:45,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:45,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:45,674 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:37:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:47,049 INFO L93 Difference]: Finished difference Result 845 states and 1488 transitions. [2019-11-06 22:37:47,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:47,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-11-06 22:37:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:47,072 INFO L225 Difference]: With dead ends: 845 [2019-11-06 22:37:47,072 INFO L226 Difference]: Without dead ends: 472 [2019-11-06 22:37:47,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-11-06 22:37:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2019-11-06 22:37:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2019-11-06 22:37:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 716 transitions. [2019-11-06 22:37:47,170 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 716 transitions. Word has length 171 [2019-11-06 22:37:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:47,173 INFO L462 AbstractCegarLoop]: Abstraction has 470 states and 716 transitions. [2019-11-06 22:37:47,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:47,173 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 716 transitions. [2019-11-06 22:37:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-06 22:37:47,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:47,190 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:47,191 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 606817572, now seen corresponding path program 1 times [2019-11-06 22:37:47,192 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:47,192 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289844831] [2019-11-06 22:37:47,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:47,496 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289844831] [2019-11-06 22:37:47,496 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:47,496 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018608917] [2019-11-06 22:37:47,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:47,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:47,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:47,500 INFO L87 Difference]: Start difference. First operand 470 states and 716 transitions. Second operand 3 states. [2019-11-06 22:37:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:48,677 INFO L93 Difference]: Finished difference Result 1368 states and 2117 transitions. [2019-11-06 22:37:48,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:48,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2019-11-06 22:37:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:48,687 INFO L225 Difference]: With dead ends: 1368 [2019-11-06 22:37:48,688 INFO L226 Difference]: Without dead ends: 904 [2019-11-06 22:37:48,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2019-11-06 22:37:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 888. [2019-11-06 22:37:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-11-06 22:37:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1330 transitions. [2019-11-06 22:37:48,762 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1330 transitions. Word has length 183 [2019-11-06 22:37:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:48,762 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1330 transitions. [2019-11-06 22:37:48,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1330 transitions. [2019-11-06 22:37:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 22:37:48,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:48,767 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 22:37:48,767 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:48,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1768475732, now seen corresponding path program 1 times [2019-11-06 22:37:48,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:48,768 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705314507] [2019-11-06 22:37:48,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:48,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705314507] [2019-11-06 22:37:48,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202644451] [2019-11-06 22:37:48,900 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 22:37:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:49,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:49,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:49,426 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:49,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1296338750] [2019-11-06 22:37:49,590 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 194 [2019-11-06 22:37:49,666 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:37:49,666 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)