/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:08,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:08,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:08,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:57:08,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:57:08,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:57:08,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:57:08,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:57:08,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:57:08,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:57:08,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:57:08,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:57:08,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:08,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:08,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:08,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:08,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:08,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:08,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:09,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:09,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:09,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:09,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:09,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:09,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:09,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:09,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:09,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:09,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:57:09,047 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:09,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:09,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:09,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:09,050 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:09,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:09,050 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:09,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:09,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:09,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:09,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:09,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:09,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:09,053 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:09,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:09,053 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:09,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:09,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:09,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:09,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:09,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:09,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:09,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:09,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:09,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:09,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:09,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:09,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:09,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:57:09,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:09,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:09,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:09,351 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:09,352 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:09,352 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-11-06 22:57:09,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f21db37e7/7710384de4be427587e895c197185526/FLAG69fc69cdb [2019-11-06 22:57:10,117 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:10,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label21.c [2019-11-06 22:57:10,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f21db37e7/7710384de4be427587e895c197185526/FLAG69fc69cdb [2019-11-06 22:57:10,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f21db37e7/7710384de4be427587e895c197185526 [2019-11-06 22:57:10,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:10,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:10,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:10,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:10,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:10,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:10" (1/1) ... [2019-11-06 22:57:10,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56069b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:10, skipping insertion in model container [2019-11-06 22:57:10,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:10" (1/1) ... [2019-11-06 22:57:10,270 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:10,392 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:11,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:11,704 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:12,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:12,191 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:12,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12 WrapperNode [2019-11-06 22:57:12,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:12,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:12,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:12,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:12,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... [2019-11-06 22:57:12,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:12,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:12,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:12,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:12,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:12,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:12,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:12,561 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:12,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:12,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:12,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:12,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:12,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:12,564 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:12,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:12,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:16,064 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:16,064 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:16,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:16 BoogieIcfgContainer [2019-11-06 22:57:16,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:16,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:16,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:16,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:16,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:10" (1/3) ... [2019-11-06 22:57:16,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63503d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:16, skipping insertion in model container [2019-11-06 22:57:16,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:12" (2/3) ... [2019-11-06 22:57:16,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63503d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:16, skipping insertion in model container [2019-11-06 22:57:16,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:16" (3/3) ... [2019-11-06 22:57:16,085 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label21.c [2019-11-06 22:57:16,099 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:16,110 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:16,122 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:16,164 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:16,165 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:16,166 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:16,166 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:16,166 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:16,166 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:16,166 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:16,167 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-06 22:57:16,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:16,226 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:16,228 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash -242469919, now seen corresponding path program 1 times [2019-11-06 22:57:16,246 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:16,246 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523739408] [2019-11-06 22:57:16,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:16,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523739408] [2019-11-06 22:57:16,621 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:16,622 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:57:16,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533831516] [2019-11-06 22:57:16,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:57:16,701 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:57:16,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:16,720 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:57:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:21,302 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:57:21,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:57:21,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-11-06 22:57:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:21,338 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:57:21,339 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:57:21,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:57:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:57:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:57:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:57:21,505 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 64 [2019-11-06 22:57:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:21,506 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:57:21,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:57:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:57:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 22:57:21,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:21,520 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:21,521 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1527115477, now seen corresponding path program 1 times [2019-11-06 22:57:21,522 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:21,522 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202232679] [2019-11-06 22:57:21,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:21,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202232679] [2019-11-06 22:57:21,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:21,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:21,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855566972] [2019-11-06 22:57:21,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:21,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:21,829 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:57:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:27,264 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-11-06 22:57:27,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:27,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-11-06 22:57:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:27,284 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:57:27,284 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:57:27,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:57:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-11-06 22:57:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:57:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5126 transitions. [2019-11-06 22:57:27,376 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5126 transitions. Word has length 137 [2019-11-06 22:57:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:27,377 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 5126 transitions. [2019-11-06 22:57:27,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5126 transitions. [2019-11-06 22:57:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-06 22:57:27,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:27,381 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:27,382 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:27,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1106833084, now seen corresponding path program 1 times [2019-11-06 22:57:27,382 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:27,383 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155043667] [2019-11-06 22:57:27,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:27,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155043667] [2019-11-06 22:57:27,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:27,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:27,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844088763] [2019-11-06 22:57:27,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:27,685 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:27,686 INFO L87 Difference]: Start difference. First operand 2864 states and 5126 transitions. Second operand 6 states. [2019-11-06 22:57:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:32,723 INFO L93 Difference]: Finished difference Result 7213 states and 12908 transitions. [2019-11-06 22:57:32,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:32,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2019-11-06 22:57:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:32,751 INFO L225 Difference]: With dead ends: 7213 [2019-11-06 22:57:32,752 INFO L226 Difference]: Without dead ends: 4355 [2019-11-06 22:57:32,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2019-11-06 22:57:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 4331. [2019-11-06 22:57:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-11-06 22:57:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 7302 transitions. [2019-11-06 22:57:32,879 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 7302 transitions. Word has length 226 [2019-11-06 22:57:32,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:32,881 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 7302 transitions. [2019-11-06 22:57:32,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 7302 transitions. [2019-11-06 22:57:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-11-06 22:57:32,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:32,890 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:57:32,891 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash -467155753, now seen corresponding path program 1 times [2019-11-06 22:57:32,891 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:32,892 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214624129] [2019-11-06 22:57:32,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 114 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:33,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214624129] [2019-11-06 22:57:33,164 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348482503] [2019-11-06 22:57:33,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:33,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:57:33,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 22:57:33,491 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 114 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:33,674 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:57:33,675 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:57:33,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258547452] [2019-11-06 22:57:33,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:33,676 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:57:33,678 INFO L87 Difference]: Start difference. First operand 4331 states and 7302 transitions. Second operand 5 states. [2019-11-06 22:57:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:39,562 INFO L93 Difference]: Finished difference Result 10979 states and 18825 transitions. [2019-11-06 22:57:39,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:39,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 268 [2019-11-06 22:57:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:39,597 INFO L225 Difference]: With dead ends: 10979 [2019-11-06 22:57:39,597 INFO L226 Difference]: Without dead ends: 6654 [2019-11-06 22:57:39,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:57:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2019-11-06 22:57:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 6600. [2019-11-06 22:57:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6600 states. [2019-11-06 22:57:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 10776 transitions. [2019-11-06 22:57:39,787 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 10776 transitions. Word has length 268 [2019-11-06 22:57:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:39,788 INFO L462 AbstractCegarLoop]: Abstraction has 6600 states and 10776 transitions. [2019-11-06 22:57:39,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:57:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 10776 transitions. [2019-11-06 22:57:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-06 22:57:39,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:39,799 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:57:40,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:40,007 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 767703552, now seen corresponding path program 1 times [2019-11-06 22:57:40,007 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:40,008 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998715638] [2019-11-06 22:57:40,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:40,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998715638] [2019-11-06 22:57:40,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:40,395 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:40,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148116204] [2019-11-06 22:57:40,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:40,396 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:40,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:40,397 INFO L87 Difference]: Start difference. First operand 6600 states and 10776 transitions. Second operand 6 states. [2019-11-06 22:57:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:45,076 INFO L93 Difference]: Finished difference Result 15532 states and 25737 transitions. [2019-11-06 22:57:45,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:45,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-11-06 22:57:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:45,119 INFO L225 Difference]: With dead ends: 15532 [2019-11-06 22:57:45,120 INFO L226 Difference]: Without dead ends: 8938 [2019-11-06 22:57:45,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:57:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2019-11-06 22:57:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 8892. [2019-11-06 22:57:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8892 states. [2019-11-06 22:57:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8892 states to 8892 states and 13600 transitions. [2019-11-06 22:57:45,334 INFO L78 Accepts]: Start accepts. Automaton has 8892 states and 13600 transitions. Word has length 276 [2019-11-06 22:57:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:45,335 INFO L462 AbstractCegarLoop]: Abstraction has 8892 states and 13600 transitions. [2019-11-06 22:57:45,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8892 states and 13600 transitions. [2019-11-06 22:57:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-11-06 22:57:45,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:45,344 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:57:45,345 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1641533328, now seen corresponding path program 1 times [2019-11-06 22:57:45,345 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:45,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026146219] [2019-11-06 22:57:45,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 114 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:45,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026146219] [2019-11-06 22:57:45,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022900771] [2019-11-06 22:57:45,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:57:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:45,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:57:45,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-06 22:57:45,910 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 114 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:57:46,091 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:57:46,091 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-11-06 22:57:46,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432095574] [2019-11-06 22:57:46,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:46,093 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:46,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:57:46,098 INFO L87 Difference]: Start difference. First operand 8892 states and 13600 transitions. Second operand 5 states.