/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/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:36:48,909 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:36:48,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:36:48,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:36:48,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:36:48,994 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 01:36:49,008 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:36:49,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:36:49,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:36:49,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:36:49,010 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:36:49,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:36:49,010 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:36:49,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:36:49,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:36:49,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:36:49,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:36:49,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:36:49,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:36:49,011 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:36:49,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:36:49,012 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:36:49,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:36:49,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:36:49,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:36:49,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:36:49,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:36:49,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:36:49,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:36:49,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:36:49,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:36:49,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:36:49,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:36:49,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:36:49,014 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 01:36:49,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:36:49,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:36:49,310 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:36:49,311 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:36:49,312 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:36:49,312 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-11-07 01:36:49,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0beceb15/94a497ca513847fb9e29edab7fb15979/FLAG291c85f76 [2019-11-07 01:36:50,015 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:36:50,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-11-07 01:36:50,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0beceb15/94a497ca513847fb9e29edab7fb15979/FLAG291c85f76 [2019-11-07 01:36:50,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0beceb15/94a497ca513847fb9e29edab7fb15979 [2019-11-07 01:36:50,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:36:50,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:36:50,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:36:50,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:36:50,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:36:50,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:50" (1/1) ... [2019-11-07 01:36:50,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9f32a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:50, skipping insertion in model container [2019-11-07 01:36:50,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:50" (1/1) ... [2019-11-07 01:36:50,460 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:36:50,570 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:36:51,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:36:51,218 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:36:51,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:36:51,343 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:36:51,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51 WrapperNode [2019-11-07 01:36:51,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:36:51,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:36:51,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:36:51,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:36:51,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (1/1) ... [2019-11-07 01:36:51,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:36:51,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:36:51,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:36:51,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:36:51,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (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 01:36:51,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:36:51,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:36:51,536 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:36:51,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:36:51,536 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:36:51,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:36:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:36:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:36:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:36:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:36:51,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:36:53,552 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:36:53,553 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:36:53,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:53 BoogieIcfgContainer [2019-11-07 01:36:53,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:36:53,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:36:53,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:36:53,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:36:53,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:50" (1/3) ... [2019-11-07 01:36:53,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485b7fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:53, skipping insertion in model container [2019-11-07 01:36:53,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:51" (2/3) ... [2019-11-07 01:36:53,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485b7fd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:53, skipping insertion in model container [2019-11-07 01:36:53,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:53" (3/3) ... [2019-11-07 01:36:53,563 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2019-11-07 01:36:53,573 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:36:53,582 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:36:53,594 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:36:53,620 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:36:53,621 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:36:53,621 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:36:53,621 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:36:53,621 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:36:53,621 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:36:53,621 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:36:53,622 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:36:53,644 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-11-07 01:36:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:36:53,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:53,655 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] [2019-11-07 01:36:53,657 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:53,663 INFO L82 PathProgramCache]: Analyzing trace with hash 826786313, now seen corresponding path program 1 times [2019-11-07 01:36:53,674 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:53,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581528204] [2019-11-07 01:36:53,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:54,108 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 01:36:54,109 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581528204] [2019-11-07 01:36:54,110 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:54,110 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:36:54,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6981326] [2019-11-07 01:36:54,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:36:54,118 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:36:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:54,135 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-11-07 01:36:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:54,771 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-11-07 01:36:54,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:36:54,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-11-07 01:36:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:54,797 INFO L225 Difference]: With dead ends: 246 [2019-11-07 01:36:54,797 INFO L226 Difference]: Without dead ends: 157 [2019-11-07 01:36:54,804 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 01:36:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-07 01:36:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-07 01:36:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-07 01:36:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 291 transitions. [2019-11-07 01:36:54,912 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 291 transitions. Word has length 77 [2019-11-07 01:36:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:54,914 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 291 transitions. [2019-11-07 01:36:54,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:36:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 291 transitions. [2019-11-07 01:36:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:36:54,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:54,922 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:36:54,922 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash 579761264, now seen corresponding path program 1 times [2019-11-07 01:36:54,923 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:54,923 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616124484] [2019-11-07 01:36:54,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:55,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616124484] [2019-11-07 01:36:55,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:55,134 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:36:55,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878349523] [2019-11-07 01:36:55,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:36:55,137 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:55,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:36:55,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:55,138 INFO L87 Difference]: Start difference. First operand 157 states and 291 transitions. Second operand 3 states. [2019-11-07 01:36:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:55,575 INFO L93 Difference]: Finished difference Result 459 states and 872 transitions. [2019-11-07 01:36:55,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:36:55,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:36:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:55,580 INFO L225 Difference]: With dead ends: 459 [2019-11-07 01:36:55,580 INFO L226 Difference]: Without dead ends: 307 [2019-11-07 01:36:55,582 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 01:36:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2019-11-07 01:36:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 232. [2019-11-07 01:36:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-07 01:36:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 412 transitions. [2019-11-07 01:36:55,617 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 412 transitions. Word has length 94 [2019-11-07 01:36:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:55,618 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 412 transitions. [2019-11-07 01:36:55,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:36:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 412 transitions. [2019-11-07 01:36:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-07 01:36:55,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:55,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:55,625 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash -164929604, now seen corresponding path program 1 times [2019-11-07 01:36:55,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:55,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743763459] [2019-11-07 01:36:55,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:55,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743763459] [2019-11-07 01:36:55,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:55,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:36:55,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962616961] [2019-11-07 01:36:55,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:36:55,826 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:55,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:36:55,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:36:55,827 INFO L87 Difference]: Start difference. First operand 232 states and 412 transitions. Second operand 6 states. [2019-11-07 01:36:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:56,488 INFO L93 Difference]: Finished difference Result 635 states and 1150 transitions. [2019-11-07 01:36:56,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:36:56,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-11-07 01:36:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:56,493 INFO L225 Difference]: With dead ends: 635 [2019-11-07 01:36:56,493 INFO L226 Difference]: Without dead ends: 408 [2019-11-07 01:36:56,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:36:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2019-11-07 01:36:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 398. [2019-11-07 01:36:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2019-11-07 01:36:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 649 transitions. [2019-11-07 01:36:56,528 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 649 transitions. Word has length 120 [2019-11-07 01:36:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:56,529 INFO L462 AbstractCegarLoop]: Abstraction has 398 states and 649 transitions. [2019-11-07 01:36:56,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:36:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 649 transitions. [2019-11-07 01:36:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-07 01:36:56,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:56,535 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:56,535 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash 901496809, now seen corresponding path program 1 times [2019-11-07 01:36:56,536 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:56,536 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658117625] [2019-11-07 01:36:56,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:56,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658117625] [2019-11-07 01:36:56,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045395602] [2019-11-07 01:36:56,654 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 01:36:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:56,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:36:56,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:36:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:56,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:36:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:56,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992591461] [2019-11-07 01:36:57,039 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-11-07 01:36:57,040 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:36:57,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:36:57,054 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:36:57,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:36:57,270 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 100 for LOIs [2019-11-07 01:36:58,332 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 189 [2019-11-07 01:36:58,765 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 140 for LOIs [2019-11-07 01:36:59,067 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-11-07 01:36:59,227 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-11-07 01:36:59,641 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-11-07 01:36:59,863 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-11-07 01:37:00,514 WARN L191 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:37:01,008 WARN L191 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:37:01,672 WARN L191 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:37:02,201 WARN L191 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 01:37:03,245 WARN L191 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:03,790 WARN L191 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:06,198 WARN L191 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:06,752 WARN L191 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:07,999 WARN L191 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:08,651 WARN L191 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:09,435 WARN L191 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:10,016 WARN L191 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:12,797 WARN L191 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:13,345 WARN L191 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:14,111 WARN L191 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:14,643 WARN L191 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:16,891 WARN L191 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:17,448 WARN L191 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:18,299 WARN L191 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:18,865 WARN L191 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:19,709 WARN L191 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:20,241 WARN L191 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:20,978 WARN L191 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:21,506 WARN L191 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:22,253 WARN L191 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:22,879 WARN L191 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:23,819 WARN L191 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:24,537 WARN L191 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:25,724 WARN L191 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:26,465 WARN L191 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-07 01:37:27,285 WARN L191 SmtUtils]: Spent 609.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:37:28,182 WARN L191 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:37:29,383 WARN L191 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:37:30,204 WARN L191 SmtUtils]: Spent 819.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:37:31,387 WARN L191 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:37:32,489 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 210 [2019-11-07 01:37:33,398 WARN L191 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 210