/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:39:24,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:39:24,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:39:24,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:39:24,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:39:24,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:39:24,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:39:24,670 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 [2019-11-07 01:39:24,704 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:39:24,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:39:24,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:39:24,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:39:24,709 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:39:24,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:39:24,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:39:24,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:39:24,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:39:24,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:39:24,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:39:24,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:39:24,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:39:24,711 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:39:24,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:39:24,711 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:39:24,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:39:24,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:39:24,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:39:24,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:39:24,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:39:24,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:39:24,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:39:24,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:39:24,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:39:24,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:39:24,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:39:24,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:39:24,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:39:25,026 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:39:25,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:39:25,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:39:25,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:39:25,051 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:39:25,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2019-11-07 01:39:25,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1435e88/bde39937606742ebba8844bd03b3dad1/FLAG5a5401336 [2019-11-07 01:39:25,712 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:39:25,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label35.c [2019-11-07 01:39:25,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1435e88/bde39937606742ebba8844bd03b3dad1/FLAG5a5401336 [2019-11-07 01:39:25,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf1435e88/bde39937606742ebba8844bd03b3dad1 [2019-11-07 01:39:25,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:39:25,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:39:25,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:25,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:39:25,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:39:25,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:25" (1/1) ... [2019-11-07 01:39:26,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45af4bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:25, skipping insertion in model container [2019-11-07 01:39:26,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:25" (1/1) ... [2019-11-07 01:39:26,010 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:39:26,076 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:39:26,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:26,588 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:39:26,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:39:26,780 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:39:26,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26 WrapperNode [2019-11-07 01:39:26,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:39:26,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:39:26,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:39:26,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:39:26,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (1/1) ... [2019-11-07 01:39:26,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:39:26,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:39:26,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:39:26,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:39:26,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (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 [2019-11-07 01:39:26,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:39:26,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:39:26,980 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:39:26,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:39:26,981 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:39:26,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:39:26,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:39:26,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:39:26,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:39:26,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:39:26,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:39:29,102 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:39:29,103 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:39:29,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:29 BoogieIcfgContainer [2019-11-07 01:39:29,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:39:29,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:39:29,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:39:29,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:39:29,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:25" (1/3) ... [2019-11-07 01:39:29,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfe73dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:29, skipping insertion in model container [2019-11-07 01:39:29,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:26" (2/3) ... [2019-11-07 01:39:29,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfe73dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:29, skipping insertion in model container [2019-11-07 01:39:29,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:29" (3/3) ... [2019-11-07 01:39:29,123 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label35.c [2019-11-07 01:39:29,136 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:39:29,148 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:39:29,159 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:39:29,195 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:39:29,195 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:39:29,195 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:39:29,195 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:39:29,196 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:39:29,196 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:39:29,196 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:39:29,196 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:39:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:39:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:39:29,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:29,252 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:29,255 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -219367113, now seen corresponding path program 1 times [2019-11-07 01:39:29,273 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:29,273 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045431008] [2019-11-07 01:39:29,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:29,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045431008] [2019-11-07 01:39:29,801 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:29,801 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:39:29,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334511433] [2019-11-07 01:39:29,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:39:29,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:39:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:29,825 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:39:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:30,334 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:39:30,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:39:30,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:39:30,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:30,358 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:39:30,358 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:39:30,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:39:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:39:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:39:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:39:30,427 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:39:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:30,428 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:39:30,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:39:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:39:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:39:30,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:30,434 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:39:30,435 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:30,435 INFO L82 PathProgramCache]: Analyzing trace with hash -701901892, now seen corresponding path program 1 times [2019-11-07 01:39:30,436 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:30,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378974291] [2019-11-07 01:39:30,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:30,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378974291] [2019-11-07 01:39:30,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:30,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:39:30,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104795756] [2019-11-07 01:39:30,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:39:30,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:39:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:30,632 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:39:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:31,079 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:39:31,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:39:31,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:39:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:31,085 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:39:31,085 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:39:31,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:39:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-11-07 01:39:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-07 01:39:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 415 transitions. [2019-11-07 01:39:31,113 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 415 transitions. Word has length 94 [2019-11-07 01:39:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:31,114 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 415 transitions. [2019-11-07 01:39:31,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:39:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 415 transitions. [2019-11-07 01:39:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-07 01:39:31,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:31,125 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:39:31,125 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2133060150, now seen corresponding path program 1 times [2019-11-07 01:39:31,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:31,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907970739] [2019-11-07 01:39:31,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:31,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907970739] [2019-11-07 01:39:31,311 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:39:31,311 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:39:31,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514715994] [2019-11-07 01:39:31,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:39:31,312 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:31,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:39:31,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:31,315 INFO L87 Difference]: Start difference. First operand 259 states and 415 transitions. Second operand 3 states. [2019-11-07 01:39:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:31,780 INFO L93 Difference]: Finished difference Result 765 states and 1258 transitions. [2019-11-07 01:39:31,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:39:31,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-11-07 01:39:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:31,787 INFO L225 Difference]: With dead ends: 765 [2019-11-07 01:39:31,787 INFO L226 Difference]: Without dead ends: 511 [2019-11-07 01:39:31,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:39:31,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-11-07 01:39:31,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 427. [2019-11-07 01:39:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-07 01:39:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 687 transitions. [2019-11-07 01:39:31,828 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 687 transitions. Word has length 99 [2019-11-07 01:39:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:31,828 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 687 transitions. [2019-11-07 01:39:31,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:39:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 687 transitions. [2019-11-07 01:39:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-07 01:39:31,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:31,838 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:31,838 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1609786354, now seen corresponding path program 1 times [2019-11-07 01:39:31,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:31,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508487128] [2019-11-07 01:39:31,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:32,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508487128] [2019-11-07 01:39:32,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684170590] [2019-11-07 01:39:32,112 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 [2019-11-07 01:39:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:32,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:39:32,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:39:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:32,385 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:39:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:39:32,563 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109113087] [2019-11-07 01:39:32,599 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:39:32,599 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:39:32,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:39:32,615 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:39:32,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:39:32,776 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-11-07 01:39:34,216 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-11-07 01:39:38,662 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-11-07 01:39:38,871 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-11-07 01:39:39,114 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2019-11-07 01:39:41,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:39:41,245 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:39:41,666 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2019-11-07 01:39:41,991 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-11-07 01:39:42,283 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2019-11-07 01:39:42,574 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-11-07 01:39:42,798 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 01:39:43,027 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2019-11-07 01:39:43,343 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 85 [2019-11-07 01:39:43,716 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2019-11-07 01:39:44,151 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-11-07 01:39:45,105 WARN L191 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 82 [2019-11-07 01:39:49,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:39:49,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10, 5, 5] total 27 [2019-11-07 01:39:49,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797713642] [2019-11-07 01:39:49,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 01:39:49,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:39:49,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 01:39:49,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2019-11-07 01:39:49,887 INFO L87 Difference]: Start difference. First operand 427 states and 687 transitions. Second operand 14 states. [2019-11-07 01:39:50,067 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:39:50,421 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 91 [2019-11-07 01:39:50,805 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 97 [2019-11-07 01:39:51,192 WARN L191 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2019-11-07 01:39:51,546 WARN L191 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-11-07 01:39:51,927 WARN L191 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 92 [2019-11-07 01:39:52,568 WARN L191 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-11-07 01:39:52,809 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2019-11-07 01:39:53,043 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2019-11-07 01:39:53,204 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-07 01:39:53,414 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-11-07 01:39:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:39:56,823 INFO L93 Difference]: Finished difference Result 1222 states and 1988 transitions. [2019-11-07 01:39:56,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 01:39:56,825 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2019-11-07 01:39:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:39:56,831 INFO L225 Difference]: With dead ends: 1222 [2019-11-07 01:39:56,832 INFO L226 Difference]: Without dead ends: 800 [2019-11-07 01:39:56,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 286 SyntacticMatches, 104 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=336, Invalid=1070, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 01:39:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2019-11-07 01:39:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 788. [2019-11-07 01:39:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2019-11-07 01:39:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1173 transitions. [2019-11-07 01:39:56,872 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1173 transitions. Word has length 135 [2019-11-07 01:39:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:39:56,873 INFO L462 AbstractCegarLoop]: Abstraction has 788 states and 1173 transitions. [2019-11-07 01:39:56,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 01:39:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1173 transitions. [2019-11-07 01:39:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-07 01:39:56,876 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:39:56,877 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:39:57,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:39:57,083 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:39:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:39:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash 989208163, now seen corresponding path program 1 times [2019-11-07 01:39:57,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:39:57,085 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280364865] [2019-11-07 01:39:57,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:39:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:39:57,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280364865] [2019-11-07 01:39:57,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654488387] [2019-11-07 01:39:57,236 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 [2019-11-07 01:39:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:39:57,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:39:57,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:39:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:39:57,423 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:39:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 01:39:57,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [160403020] [2019-11-07 01:39:57,502 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:39:57,503 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:39:57,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:39:57,504 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:39:57,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:39:57,547 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 85 for LOIs [2019-11-07 01:39:58,076 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-11-07 01:39:59,179 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-11-07 01:39:59,217 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-11-07 01:39:59,264 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-11-07 01:39:59,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:39:59,799 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:40:00,098 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2019-11-07 01:40:00,731 WARN L191 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 97 [2019-11-07 01:40:01,662 WARN L191 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 94 [2019-11-07 01:40:01,943 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-11-07 01:40:02,179 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2019-11-07 01:40:02,430 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 01:40:02,760 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-11-07 01:40:03,034 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2019-11-07 01:40:03,366 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2019-11-07 01:40:03,797 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2019-11-07 01:40:04,133 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85