java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:01:46,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:01:46,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:01:46,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:01:46,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:01:46,965 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:01:46,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:01:46,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:01:46,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:01:46,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:01:46,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:01:46,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:01:46,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:01:46,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:01:46,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:01:46,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:01:46,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:01:47,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:01:47,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:01:47,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:01:47,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:01:47,047 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:01:47,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:01:47,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:01:47,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:01:47,049 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:01:47,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:01:47,050 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:01:47,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:01:47,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:01:47,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:01:47,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:01:47,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:01:47,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:01:47,051 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:01:47,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:01:47,051 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:01:47,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:01:47,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:01:47,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:01:47,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:01:47,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:01:47,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:47,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:01:47,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:01:47,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:01:47,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:01:47,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:01:47,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:01:47,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:01:47,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:01:47,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:01:47,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:01:47,362 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:01:47,362 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:01:47,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label39.c [2019-10-15 00:01:47,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df53fdff/35b1a4741ad34cb1b90fdfbd10846f8d/FLAGc98cc0494 [2019-10-15 00:01:48,028 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:01:48,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label39.c [2019-10-15 00:01:48,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df53fdff/35b1a4741ad34cb1b90fdfbd10846f8d/FLAGc98cc0494 [2019-10-15 00:01:48,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df53fdff/35b1a4741ad34cb1b90fdfbd10846f8d [2019-10-15 00:01:48,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:01:48,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:01:48,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:48,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:01:48,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:01:48,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:48,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3457a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48, skipping insertion in model container [2019-10-15 00:01:48,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:48,294 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:01:48,341 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:01:48,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:48,867 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:01:48,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:48,971 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:01:48,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48 WrapperNode [2019-10-15 00:01:48,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:48,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:01:48,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:01:48,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:01:48,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:48,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:49,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:49,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:49,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:49,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:49,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... [2019-10-15 00:01:49,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:01:49,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:01:49,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:01:49,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:01:49,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:49,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:01:49,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:01:49,159 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:01:49,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:01:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:01:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:01:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:01:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:01:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:01:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:01:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:50,371 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:50,372 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:50,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:50 BoogieIcfgContainer [2019-10-15 00:01:50,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:50,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:50,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:50,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:50,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:48" (1/3) ... [2019-10-15 00:01:50,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693f9502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:50, skipping insertion in model container [2019-10-15 00:01:50,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:48" (2/3) ... [2019-10-15 00:01:50,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693f9502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:50, skipping insertion in model container [2019-10-15 00:01:50,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:50" (3/3) ... [2019-10-15 00:01:50,393 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label39.c [2019-10-15 00:01:50,403 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:50,413 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:50,424 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:50,455 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:50,456 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:50,456 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:50,456 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:50,458 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:50,458 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:50,458 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:50,458 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 00:01:50,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:50,491 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:50,493 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1917412719, now seen corresponding path program 1 times [2019-10-15 00:01:50,507 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:50,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531632200] [2019-10-15 00:01:50,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:50,508 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:50,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:50,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531632200] [2019-10-15 00:01:50,817 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:50,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:50,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12237858] [2019-10-15 00:01:50,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:50,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:50,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:50,843 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-15 00:01:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:52,195 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-15 00:01:52,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:52,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 00:01:52,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:52,230 INFO L225 Difference]: With dead ends: 733 [2019-10-15 00:01:52,230 INFO L226 Difference]: Without dead ends: 437 [2019-10-15 00:01:52,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:52,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-15 00:01:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-15 00:01:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:01:52,356 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 32 [2019-10-15 00:01:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:52,357 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:01:52,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:01:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-15 00:01:52,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:52,363 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:52,363 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash 845536850, now seen corresponding path program 1 times [2019-10-15 00:01:52,364 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:52,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762350377] [2019-10-15 00:01:52,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:52,365 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:52,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:52,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762350377] [2019-10-15 00:01:52,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917328701] [2019-10-15 00:01:52,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:52,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:52,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:52,848 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:52,906 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:01:52,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:01:52,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741758717] [2019-10-15 00:01:52,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:52,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:52,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:52,915 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-10-15 00:01:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:53,984 INFO L93 Difference]: Finished difference Result 1154 states and 1795 transitions. [2019-10-15 00:01:53,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:53,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-10-15 00:01:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:53,991 INFO L225 Difference]: With dead ends: 1154 [2019-10-15 00:01:53,991 INFO L226 Difference]: Without dead ends: 866 [2019-10-15 00:01:53,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-15 00:01:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2019-10-15 00:01:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-10-15 00:01:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1235 transitions. [2019-10-15 00:01:54,055 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1235 transitions. Word has length 102 [2019-10-15 00:01:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:54,056 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1235 transitions. [2019-10-15 00:01:54,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1235 transitions. [2019-10-15 00:01:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-15 00:01:54,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:54,060 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:54,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:54,265 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:54,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1094831721, now seen corresponding path program 1 times [2019-10-15 00:01:54,266 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:54,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808015536] [2019-10-15 00:01:54,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:54,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:54,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:54,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808015536] [2019-10-15 00:01:54,423 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:54,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:54,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450492237] [2019-10-15 00:01:54,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:54,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:54,434 INFO L87 Difference]: Start difference. First operand 866 states and 1235 transitions. Second operand 6 states. [2019-10-15 00:01:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:55,504 INFO L93 Difference]: Finished difference Result 1766 states and 2578 transitions. [2019-10-15 00:01:55,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:55,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-10-15 00:01:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:55,515 INFO L225 Difference]: With dead ends: 1766 [2019-10-15 00:01:55,515 INFO L226 Difference]: Without dead ends: 906 [2019-10-15 00:01:55,517 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-15 00:01:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 886. [2019-10-15 00:01:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-15 00:01:55,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1211 transitions. [2019-10-15 00:01:55,553 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1211 transitions. Word has length 113 [2019-10-15 00:01:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:55,554 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1211 transitions. [2019-10-15 00:01:55,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1211 transitions. [2019-10-15 00:01:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 00:01:55,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:55,560 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:55,560 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1618424411, now seen corresponding path program 1 times [2019-10-15 00:01:55,561 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:55,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282204334] [2019-10-15 00:01:55,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:55,562 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:55,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:55,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282204334] [2019-10-15 00:01:55,760 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:55,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:55,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954018476] [2019-10-15 00:01:55,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:55,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:55,762 INFO L87 Difference]: Start difference. First operand 886 states and 1211 transitions. Second operand 6 states. [2019-10-15 00:01:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:56,665 INFO L93 Difference]: Finished difference Result 2394 states and 3478 transitions. [2019-10-15 00:01:56,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:56,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-10-15 00:01:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:56,677 INFO L225 Difference]: With dead ends: 2394 [2019-10-15 00:01:56,677 INFO L226 Difference]: Without dead ends: 1514 [2019-10-15 00:01:56,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:56,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2019-10-15 00:01:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1482. [2019-10-15 00:01:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2019-10-15 00:01:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2029 transitions. [2019-10-15 00:01:56,732 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2029 transitions. Word has length 163 [2019-10-15 00:01:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:56,733 INFO L462 AbstractCegarLoop]: Abstraction has 1482 states and 2029 transitions. [2019-10-15 00:01:56,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2029 transitions. [2019-10-15 00:01:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-15 00:01:56,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:56,737 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:01:56,738 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash 38952791, now seen corresponding path program 1 times [2019-10-15 00:01:56,738 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:56,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449151598] [2019-10-15 00:01:56,739 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:56,739 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:56,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 50 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:01:56,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449151598] [2019-10-15 00:01:56,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845143502] [2019-10-15 00:01:56,916 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 [2019-10-15 00:01:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:56,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:01:56,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 00:01:57,059 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 50 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:01:57,159 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:01:57,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-15 00:01:57,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733492664] [2019-10-15 00:01:57,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:57,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:57,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:57,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:01:57,161 INFO L87 Difference]: Start difference. First operand 1482 states and 2029 transitions. Second operand 5 states. [2019-10-15 00:01:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:58,143 INFO L93 Difference]: Finished difference Result 4019 states and 5739 transitions. [2019-10-15 00:01:58,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:01:58,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-10-15 00:01:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:58,162 INFO L225 Difference]: With dead ends: 4019 [2019-10-15 00:01:58,162 INFO L226 Difference]: Without dead ends: 2543 [2019-10-15 00:01:58,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:01:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2019-10-15 00:01:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2509. [2019-10-15 00:01:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2509 states. [2019-10-15 00:01:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3402 transitions. [2019-10-15 00:01:58,270 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3402 transitions. Word has length 182 [2019-10-15 00:01:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:58,271 INFO L462 AbstractCegarLoop]: Abstraction has 2509 states and 3402 transitions. [2019-10-15 00:01:58,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3402 transitions. [2019-10-15 00:01:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-15 00:01:58,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:58,278 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:01:58,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:58,492 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash 383631829, now seen corresponding path program 1 times [2019-10-15 00:01:58,493 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:58,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067571862] [2019-10-15 00:01:58,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:58,494 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:58,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-15 00:01:58,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067571862] [2019-10-15 00:01:58,664 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126629472] [2019-10-15 00:01:58,664 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 [2019-10-15 00:01:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:58,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:58,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-15 00:01:58,824 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-15 00:01:58,887 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:01:58,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 00:01:58,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850922575] [2019-10-15 00:01:58,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:01:58,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:01:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:01:58,889 INFO L87 Difference]: Start difference. First operand 2509 states and 3402 transitions. Second operand 3 states. [2019-10-15 00:01:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:59,448 INFO L93 Difference]: Finished difference Result 3389 states and 4615 transitions. [2019-10-15 00:01:59,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:01:59,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2019-10-15 00:01:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:59,466 INFO L225 Difference]: With dead ends: 3389 [2019-10-15 00:01:59,467 INFO L226 Difference]: Without dead ends: 3387 [2019-10-15 00:01:59,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:01:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2019-10-15 00:01:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2658. [2019-10-15 00:01:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2019-10-15 00:01:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3584 transitions. [2019-10-15 00:01:59,557 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3584 transitions. Word has length 188 [2019-10-15 00:01:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:59,558 INFO L462 AbstractCegarLoop]: Abstraction has 2658 states and 3584 transitions. [2019-10-15 00:01:59,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:01:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3584 transitions. [2019-10-15 00:01:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-15 00:01:59,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:59,570 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:59,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:59,783 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2117945153, now seen corresponding path program 1 times [2019-10-15 00:01:59,784 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:59,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340819439] [2019-10-15 00:01:59,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:59,784 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:59,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 149 proven. 72 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:00,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340819439] [2019-10-15 00:02:00,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516569100] [2019-10-15 00:02:00,543 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 [2019-10-15 00:02:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:00,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:00,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 270 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-15 00:02:00,909 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 149 proven. 72 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:01,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [164011785] [2019-10-15 00:02:01,087 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 310 [2019-10-15 00:02:01,141 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:01,141 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:02:14,076 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.