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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:39:20,488 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:39:20,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:39:20,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:39:20,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:39:20,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:39:20,588 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:39:20,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:39:20,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:39:20,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:39:20,590 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:39:20,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:39:20,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:39:20,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:39:20,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:39:20,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:39:20,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:39:20,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:39:20,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:39:20,592 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:39:20,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:39:20,594 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:39:20,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:39:20,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:39:20,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:39:20,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:39:20,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:39:20,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:39:20,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:39:20,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:39:20,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:39:20,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:39:20,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:39:20,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:39:20,598 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 [2019-10-15 01:39:20,865 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:39:20,878 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:39:20,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:39:20,883 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:39:20,883 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:39:20,884 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label10.c [2019-10-15 01:39:20,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8493939b8/d49fe48b9f0a463489d5469a282c424b/FLAGb8cb4da72 [2019-10-15 01:39:21,431 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:39:21,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label10.c [2019-10-15 01:39:21,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8493939b8/d49fe48b9f0a463489d5469a282c424b/FLAGb8cb4da72 [2019-10-15 01:39:21,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8493939b8/d49fe48b9f0a463489d5469a282c424b [2019-10-15 01:39:21,690 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:39:21,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:39:21,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:21,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:39:21,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:39:21,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:21" (1/1) ... [2019-10-15 01:39:21,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d00367c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:21, skipping insertion in model container [2019-10-15 01:39:21,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:39:21" (1/1) ... [2019-10-15 01:39:21,706 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:39:21,752 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:39:22,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:22,148 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:39:22,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:39:22,379 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:39:22,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22 WrapperNode [2019-10-15 01:39:22,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:39:22,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:39:22,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:39:22,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:39:22,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... [2019-10-15 01:39:22,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:39:22,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:39:22,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:39:22,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:39:22,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:39:22,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:39:22,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:39:22,561 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:39:22,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:39:22,561 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:39:22,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:39:22,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:39:22,562 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:39:22,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:39:22,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:39:22,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:39:24,569 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:39:24,569 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:39:24,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:24 BoogieIcfgContainer [2019-10-15 01:39:24,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:39:24,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:39:24,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:39:24,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:39:24,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:39:21" (1/3) ... [2019-10-15 01:39:24,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49be656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:24, skipping insertion in model container [2019-10-15 01:39:24,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:39:22" (2/3) ... [2019-10-15 01:39:24,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49be656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:39:24, skipping insertion in model container [2019-10-15 01:39:24,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:39:24" (3/3) ... [2019-10-15 01:39:24,589 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label10.c [2019-10-15 01:39:24,605 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:39:24,618 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:39:24,630 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:39:24,662 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:39:24,662 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:39:24,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:39:24,664 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:39:24,664 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:39:24,665 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:39:24,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:39:24,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:39:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:39:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:39:24,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:24,707 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:24,709 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash 826820964, now seen corresponding path program 1 times [2019-10-15 01:39:24,723 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:24,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648015355] [2019-10-15 01:39:24,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:24,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:24,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:25,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648015355] [2019-10-15 01:39:25,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:25,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:39:25,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509652731] [2019-10-15 01:39:25,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:39:25,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:39:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:39:25,215 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:39:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:25,779 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:39:25,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:39:25,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:39:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:25,796 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:39:25,797 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:39:25,801 INFO L600 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 [2019-10-15 01:39:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:39:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:39:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:39:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-10-15 01:39:25,864 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-10-15 01:39:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:25,865 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-10-15 01:39:25,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:39:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-10-15 01:39:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:39:25,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:25,912 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:39:25,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1022495269, now seen corresponding path program 1 times [2019-10-15 01:39:25,913 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:25,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868551303] [2019-10-15 01:39:25,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:25,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:25,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:26,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868551303] [2019-10-15 01:39:26,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:39:26,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:39:26,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588039822] [2019-10-15 01:39:26,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:39:26,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:39:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:39:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:39:26,008 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-10-15 01:39:26,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:39:26,505 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-10-15 01:39:26,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:39:26,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-10-15 01:39:26,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:39:26,511 INFO L225 Difference]: With dead ends: 479 [2019-10-15 01:39:26,511 INFO L226 Difference]: Without dead ends: 327 [2019-10-15 01:39:26,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:39:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-15 01:39:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-10-15 01:39:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-15 01:39:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 546 transitions. [2019-10-15 01:39:26,548 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 546 transitions. Word has length 86 [2019-10-15 01:39:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:39:26,549 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 546 transitions. [2019-10-15 01:39:26,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:39:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 546 transitions. [2019-10-15 01:39:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:39:26,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:39:26,553 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:39:26,553 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:39:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:39:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash -498200340, now seen corresponding path program 1 times [2019-10-15 01:39:26,554 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:39:26,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632429292] [2019-10-15 01:39:26,555 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:26,555 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:39:26,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:39:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:26,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632429292] [2019-10-15 01:39:26,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989743172] [2019-10-15 01:39:26,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:39:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:39:26,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:39:26,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:39:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:26,832 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:39:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:39:26,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43074214] [2019-10-15 01:39:26,946 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:39:26,947 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:39:26,952 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:39:26,960 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:39:26,961 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:39:27,239 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2019-10-15 01:39:29,398 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 141 for LOIs [2019-10-15 01:39:29,890 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:39:29,996 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:39:30,103 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 01:39:30,380 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 149 [2019-10-15 01:39:30,560 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:30,750 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2019-10-15 01:39:31,075 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:31,181 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:31,450 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:31,564 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-10-15 01:39:31,675 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2019-10-15 01:39:31,865 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:32,063 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:39:32,604 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:39:32,706 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:32,810 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-10-15 01:39:33,006 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:33,359 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:33,602 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2019-10-15 01:39:33,905 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:39:34,682 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:39:34,792 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-10-15 01:39:36,144 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-10-15 01:39:36,908 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 148 [2019-10-15 01:39:37,674 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2019-10-15 01:39:49,269 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 176 [2019-10-15 01:39:49,270 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:39:51,412 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 170244 conjuctions. This might take some time...