java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:10,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:10,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:10,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:10,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:10,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:10,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:10,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:10,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:11,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:11,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:11,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:11,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:11,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:11,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:11,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:11,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:11,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:11,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:11,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:11,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:11,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:11,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:11,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:11,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:11,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:11,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:11,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:11,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:11,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:11,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:11,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:11,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:11,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:11,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:11,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:11,051 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 [2019-10-13 20:07:11,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:11,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:11,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:11,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:11,093 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:11,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:11,093 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:11,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:11,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:11,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:11,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:11,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:11,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:11,094 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:11,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:11,095 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:11,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:11,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:11,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:11,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:11,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:11,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:11,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:11,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:11,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:11,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:11,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:11,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:11,101 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 [2019-10-13 20:07:11,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:11,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:11,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:11,435 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:11,436 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:11,436 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-10-13 20:07:11,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e925b849/b61000478f624146be66e391494645f8/FLAG502113817 [2019-10-13 20:07:12,166 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:12,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-10-13 20:07:12,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e925b849/b61000478f624146be66e391494645f8/FLAG502113817 [2019-10-13 20:07:12,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e925b849/b61000478f624146be66e391494645f8 [2019-10-13 20:07:12,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:12,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:12,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:12,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:12,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:12,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:12" (1/1) ... [2019-10-13 20:07:12,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3709ac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:12, skipping insertion in model container [2019-10-13 20:07:12,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:12" (1/1) ... [2019-10-13 20:07:12,477 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:12,538 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:13,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:13,153 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:13,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:13,380 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:13,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13 WrapperNode [2019-10-13 20:07:13,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:13,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:13,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:13,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:13,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (1/1) ... [2019-10-13 20:07:13,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:13,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:13,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:13,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:13,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (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 [2019-10-13 20:07:13,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:13,679 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:13,680 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:13,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:13,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:13,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:15,292 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:15,292 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:15,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:15 BoogieIcfgContainer [2019-10-13 20:07:15,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:15,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:15,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:15,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:15,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:12" (1/3) ... [2019-10-13 20:07:15,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba9b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:15, skipping insertion in model container [2019-10-13 20:07:15,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:13" (2/3) ... [2019-10-13 20:07:15,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba9b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:15, skipping insertion in model container [2019-10-13 20:07:15,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:15" (3/3) ... [2019-10-13 20:07:15,304 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label32.c [2019-10-13 20:07:15,316 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:15,325 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:15,337 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:15,367 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:15,367 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:15,368 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:15,368 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:15,368 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:15,368 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:15,368 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:15,368 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:15,394 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 20:07:15,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:15,406 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:15,408 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:15,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:15,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1416126934, now seen corresponding path program 1 times [2019-10-13 20:07:15,424 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:15,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520849523] [2019-10-13 20:07:15,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:15,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:15,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:15,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520849523] [2019-10-13 20:07:15,752 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:15,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:15,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510306091] [2019-10-13 20:07:15,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:15,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:15,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:15,780 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:07:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:17,764 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-13 20:07:17,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:17,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-10-13 20:07:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:17,788 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:07:17,788 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:07:17,796 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 [2019-10-13 20:07:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:07:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-13 20:07:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:07:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-10-13 20:07:17,908 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 61 [2019-10-13 20:07:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:17,909 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-10-13 20:07:17,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-10-13 20:07:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 20:07:17,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:17,925 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:17,926 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1588363546, now seen corresponding path program 1 times [2019-10-13 20:07:17,926 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:17,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103248089] [2019-10-13 20:07:17,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:17,931 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:17,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:18,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103248089] [2019-10-13 20:07:18,269 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:18,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:18,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530650073] [2019-10-13 20:07:18,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:18,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:18,279 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-10-13 20:07:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:19,887 INFO L93 Difference]: Finished difference Result 2012 states and 2904 transitions. [2019-10-13 20:07:19,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:19,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-10-13 20:07:19,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:19,900 INFO L225 Difference]: With dead ends: 2012 [2019-10-13 20:07:19,901 INFO L226 Difference]: Without dead ends: 1464 [2019-10-13 20:07:19,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2019-10-13 20:07:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1282. [2019-10-13 20:07:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2019-10-13 20:07:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1767 transitions. [2019-10-13 20:07:19,976 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1767 transitions. Word has length 173 [2019-10-13 20:07:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:19,977 INFO L462 AbstractCegarLoop]: Abstraction has 1282 states and 1767 transitions. [2019-10-13 20:07:19,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1767 transitions. [2019-10-13 20:07:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-10-13 20:07:19,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:19,989 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:07:19,989 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:19,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1017976546, now seen corresponding path program 1 times [2019-10-13 20:07:19,990 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:19,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279093930] [2019-10-13 20:07:19,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:19,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:19,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 129 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:20,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279093930] [2019-10-13 20:07:20,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475180754] [2019-10-13 20:07:20,349 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 [2019-10-13 20:07:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:20,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:07:20,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 20:07:20,587 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 20:07:20,702 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:07:20,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 11 [2019-10-13 20:07:20,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339844194] [2019-10-13 20:07:20,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:20,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:20,705 INFO L87 Difference]: Start difference. First operand 1282 states and 1767 transitions. Second operand 4 states. [2019-10-13 20:07:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:22,224 INFO L93 Difference]: Finished difference Result 4560 states and 6571 transitions. [2019-10-13 20:07:22,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:22,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2019-10-13 20:07:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:22,248 INFO L225 Difference]: With dead ends: 4560 [2019-10-13 20:07:22,248 INFO L226 Difference]: Without dead ends: 3284 [2019-10-13 20:07:22,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2019-10-13 20:07:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3102. [2019-10-13 20:07:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3102 states. [2019-10-13 20:07:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4211 transitions. [2019-10-13 20:07:22,375 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4211 transitions. Word has length 247 [2019-10-13 20:07:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:22,377 INFO L462 AbstractCegarLoop]: Abstraction has 3102 states and 4211 transitions. [2019-10-13 20:07:22,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4211 transitions. [2019-10-13 20:07:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-13 20:07:22,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:22,389 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:22,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:22,593 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 754436966, now seen corresponding path program 1 times [2019-10-13 20:07:22,595 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:22,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180575507] [2019-10-13 20:07:22,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:22,596 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:22,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 163 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:23,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180575507] [2019-10-13 20:07:23,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815099344] [2019-10-13 20:07:23,874 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 [2019-10-13 20:07:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:23,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:24,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:24,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 20:07:24,263 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:24,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 108 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:24,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:24,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 19 [2019-10-13 20:07:24,841 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607006583] [2019-10-13 20:07:24,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:24,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:24,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:07:24,844 INFO L87 Difference]: Start difference. First operand 3102 states and 4211 transitions. Second operand 5 states. [2019-10-13 20:07:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:26,235 INFO L93 Difference]: Finished difference Result 6070 states and 8360 transitions. [2019-10-13 20:07:26,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:26,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2019-10-13 20:07:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:26,256 INFO L225 Difference]: With dead ends: 6070 [2019-10-13 20:07:26,256 INFO L226 Difference]: Without dead ends: 3156 [2019-10-13 20:07:26,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 627 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-10-13 20:07:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2019-10-13 20:07:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2784. [2019-10-13 20:07:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2019-10-13 20:07:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3781 transitions. [2019-10-13 20:07:26,360 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3781 transitions. Word has length 315 [2019-10-13 20:07:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:26,361 INFO L462 AbstractCegarLoop]: Abstraction has 2784 states and 3781 transitions. [2019-10-13 20:07:26,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3781 transitions. [2019-10-13 20:07:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2019-10-13 20:07:26,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:26,378 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:07:26,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:26,583 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1624153950, now seen corresponding path program 1 times [2019-10-13 20:07:26,584 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:26,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791732029] [2019-10-13 20:07:26,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:26,586 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:26,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 162 proven. 132 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-13 20:07:26,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791732029] [2019-10-13 20:07:26,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935786766] [2019-10-13 20:07:26,872 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 [2019-10-13 20:07:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:26,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:07:26,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-13 20:07:27,190 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 162 proven. 132 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-13 20:07:27,393 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:27,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-13 20:07:27,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319667579] [2019-10-13 20:07:27,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:27,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:07:27,395 INFO L87 Difference]: Start difference. First operand 2784 states and 3781 transitions. Second operand 5 states. [2019-10-13 20:07:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:28,752 INFO L93 Difference]: Finished difference Result 5434 states and 7602 transitions. [2019-10-13 20:07:28,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:28,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 385 [2019-10-13 20:07:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:28,771 INFO L225 Difference]: With dead ends: 5434 [2019-10-13 20:07:28,771 INFO L226 Difference]: Without dead ends: 2656 [2019-10-13 20:07:28,781 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 764 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-13 20:07:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2624. [2019-10-13 20:07:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2624 states. [2019-10-13 20:07:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3337 transitions. [2019-10-13 20:07:28,887 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3337 transitions. Word has length 385 [2019-10-13 20:07:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:28,888 INFO L462 AbstractCegarLoop]: Abstraction has 2624 states and 3337 transitions. [2019-10-13 20:07:28,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3337 transitions. [2019-10-13 20:07:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-10-13 20:07:28,903 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:28,903 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:29,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:29,119 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1426525150, now seen corresponding path program 1 times [2019-10-13 20:07:29,121 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:29,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766475037] [2019-10-13 20:07:29,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:29,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 248 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:29,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766475037] [2019-10-13 20:07:29,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591345443] [2019-10-13 20:07:29,937 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 [2019-10-13 20:07:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:30,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:30,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:30,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 334 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 20:07:30,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:30,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 170 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:30,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1448843637] [2019-10-13 20:07:30,979 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 400 [2019-10-13 20:07:31,034 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:31,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)