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/Problem18_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:46:10,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:46:10,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:46:10,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:46:10,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:46:10,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:46:10,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:46:10,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:46:10,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:46:10,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:46:10,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:46:10,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 03:46:10,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:46:10,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:46:10,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:46:10,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:46:10,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:46:10,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:46:10,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:46:10,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:46:10,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:46:10,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:46:10,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:46:10,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:46:10,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:46:10,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:46:10,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:46:10,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:46:10,263 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 [2019-10-07 03:46:10,278 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:46:10,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:46:10,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:46:10,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:46:10,284 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:46:10,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:46:10,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:46:10,286 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:46:10,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:46:10,286 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:46:10,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:46:10,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:46:10,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:46:10,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:46:10,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:46:10,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:46:10,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:46:10,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:46:10,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:46:10,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:46:10,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:46:10,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:46:10,289 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 [2019-10-07 03:46:10,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:46:10,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:46:10,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:46:10,609 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:46:10,609 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:46:10,610 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-10-07 03:46:10,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ba509ee/7ca3171109094df0ae01bb50e5d6d44b/FLAG2bf9be29d [2019-10-07 03:46:11,369 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:46:11,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-10-07 03:46:11,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ba509ee/7ca3171109094df0ae01bb50e5d6d44b/FLAG2bf9be29d [2019-10-07 03:46:11,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17ba509ee/7ca3171109094df0ae01bb50e5d6d44b [2019-10-07 03:46:11,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:46:11,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:46:11,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:46:11,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:46:11,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:46:11,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:46:11" (1/1) ... [2019-10-07 03:46:11,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924bc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:11, skipping insertion in model container [2019-10-07 03:46:11,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:46:11" (1/1) ... [2019-10-07 03:46:11,553 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:46:11,683 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:46:13,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:46:13,119 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:46:13,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:46:13,576 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:46:13,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13 WrapperNode [2019-10-07 03:46:13,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:46:13,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:46:13,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:46:13,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:46:13,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... [2019-10-07 03:46:13,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:46:13,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:46:13,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:46:13,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:46:13,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:46:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:46:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:46:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:46:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:46:13,966 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 03:46:13,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:46:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:46:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:46:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 03:46:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:46:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:46:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:46:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:46:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:46:13,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:47:44,703 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:47:44,704 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:47:44,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:47:44 BoogieIcfgContainer [2019-10-07 03:47:44,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:47:44,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:47:44,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:47:44,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:47:44,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:46:11" (1/3) ... [2019-10-07 03:47:44,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7239e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:47:44, skipping insertion in model container [2019-10-07 03:47:44,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:13" (2/3) ... [2019-10-07 03:47:44,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7239e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:47:44, skipping insertion in model container [2019-10-07 03:47:44,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:47:44" (3/3) ... [2019-10-07 03:47:44,714 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label44.c [2019-10-07 03:47:44,723 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:47:44,729 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:47:44,740 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:47:44,772 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:47:44,772 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:47:44,772 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:47:44,772 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:47:44,773 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:47:44,773 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:47:44,773 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:47:44,773 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:47:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2019-10-07 03:47:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:47:44,807 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:47:44,807 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:47:44,809 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:47:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:47:44,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1816956838, now seen corresponding path program 1 times [2019-10-07 03:47:44,824 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:47:44,824 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:44,824 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:44,824 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:47:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:47:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:47:45,087 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:45,088 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:47:45,088 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:47:45,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:47:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:47:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:47:45,109 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 4 states. [2019-10-07 03:47:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:47:49,709 INFO L93 Difference]: Finished difference Result 1853 states and 3640 transitions. [2019-10-07 03:47:49,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:47:49,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-07 03:47:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:47:49,744 INFO L225 Difference]: With dead ends: 1853 [2019-10-07 03:47:49,745 INFO L226 Difference]: Without dead ends: 1377 [2019-10-07 03:47:49,752 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:47:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2019-10-07 03:47:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 917. [2019-10-07 03:47:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-07 03:47:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1508 transitions. [2019-10-07 03:47:49,865 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1508 transitions. Word has length 11 [2019-10-07 03:47:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:47:49,866 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1508 transitions. [2019-10-07 03:47:49,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:47:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1508 transitions. [2019-10-07 03:47:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-07 03:47:49,868 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:47:49,868 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:47:49,869 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:47:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:47:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1540363726, now seen corresponding path program 1 times [2019-10-07 03:47:49,869 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:47:49,870 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:49,870 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:49,870 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:47:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:47:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:47:50,036 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:50,036 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:47:50,037 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 03:47:50,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:47:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:47:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 03:47:50,039 INFO L87 Difference]: Start difference. First operand 917 states and 1508 transitions. Second operand 5 states. [2019-10-07 03:47:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:47:53,807 INFO L93 Difference]: Finished difference Result 2775 states and 4610 transitions. [2019-10-07 03:47:53,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:47:53,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-07 03:47:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:47:53,825 INFO L225 Difference]: With dead ends: 2775 [2019-10-07 03:47:53,825 INFO L226 Difference]: Without dead ends: 1863 [2019-10-07 03:47:53,828 INFO L606 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 [2019-10-07 03:47:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2019-10-07 03:47:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1820. [2019-10-07 03:47:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1820 states. [2019-10-07 03:47:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2819 transitions. [2019-10-07 03:47:53,987 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2819 transitions. Word has length 21 [2019-10-07 03:47:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:47:53,988 INFO L462 AbstractCegarLoop]: Abstraction has 1820 states and 2819 transitions. [2019-10-07 03:47:53,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:47:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2819 transitions. [2019-10-07 03:47:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-07 03:47:53,989 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:47:53,989 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:47:53,989 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:47:53,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:47:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1145922026, now seen corresponding path program 1 times [2019-10-07 03:47:53,990 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:47:53,990 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:53,990 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:53,991 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:47:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:47:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:47:54,094 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:54,095 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:47:54,095 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:47:54,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:47:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:47:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:47:54,097 INFO L87 Difference]: Start difference. First operand 1820 states and 2819 transitions. Second operand 6 states. [2019-10-07 03:47:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:47:58,222 INFO L93 Difference]: Finished difference Result 5538 states and 8806 transitions. [2019-10-07 03:47:58,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:47:58,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-07 03:47:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:47:58,249 INFO L225 Difference]: With dead ends: 5538 [2019-10-07 03:47:58,250 INFO L226 Difference]: Without dead ends: 3723 [2019-10-07 03:47:58,255 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:47:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2019-10-07 03:47:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3684. [2019-10-07 03:47:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3684 states. [2019-10-07 03:47:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3684 states to 3684 states and 5648 transitions. [2019-10-07 03:47:58,394 INFO L78 Accepts]: Start accepts. Automaton has 3684 states and 5648 transitions. Word has length 25 [2019-10-07 03:47:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:47:58,394 INFO L462 AbstractCegarLoop]: Abstraction has 3684 states and 5648 transitions. [2019-10-07 03:47:58,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:47:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3684 states and 5648 transitions. [2019-10-07 03:47:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-07 03:47:58,396 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:47:58,397 INFO L385 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] [2019-10-07 03:47:58,397 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:47:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:47:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 519743197, now seen corresponding path program 1 times [2019-10-07 03:47:58,397 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:47:58,398 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:58,398 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:58,398 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:47:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:47:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:47:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:47:58,572 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:47:58,572 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:47:58,572 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:47:58,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:47:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:47:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:47:58,574 INFO L87 Difference]: Start difference. First operand 3684 states and 5648 transitions. Second operand 6 states. [2019-10-07 03:48:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:02,207 INFO L93 Difference]: Finished difference Result 9716 states and 15449 transitions. [2019-10-07 03:48:02,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:02,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-07 03:48:02,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:02,236 INFO L225 Difference]: With dead ends: 9716 [2019-10-07 03:48:02,236 INFO L226 Difference]: Without dead ends: 6037 [2019-10-07 03:48:02,247 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2019-10-07 03:48:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 5864. [2019-10-07 03:48:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5864 states. [2019-10-07 03:48:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 8998 transitions. [2019-10-07 03:48:02,406 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 8998 transitions. Word has length 46 [2019-10-07 03:48:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:02,407 INFO L462 AbstractCegarLoop]: Abstraction has 5864 states and 8998 transitions. [2019-10-07 03:48:02,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:48:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 8998 transitions. [2019-10-07 03:48:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-07 03:48:02,411 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:02,411 INFO L385 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:02,412 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash -941800770, now seen corresponding path program 1 times [2019-10-07 03:48:02,412 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:02,412 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:02,412 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:02,413 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-07 03:48:02,532 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:02,532 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:02,533 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:48:02,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:48:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:48:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:48:02,534 INFO L87 Difference]: Start difference. First operand 5864 states and 8998 transitions. Second operand 4 states. [2019-10-07 03:48:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:07,145 INFO L93 Difference]: Finished difference Result 21442 states and 34034 transitions. [2019-10-07 03:48:07,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:48:07,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-07 03:48:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:07,230 INFO L225 Difference]: With dead ends: 21442 [2019-10-07 03:48:07,230 INFO L226 Difference]: Without dead ends: 15583 [2019-10-07 03:48:07,251 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:48:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15583 states. [2019-10-07 03:48:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15583 to 15239. [2019-10-07 03:48:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15239 states. [2019-10-07 03:48:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15239 states to 15239 states and 22881 transitions. [2019-10-07 03:48:07,630 INFO L78 Accepts]: Start accepts. Automaton has 15239 states and 22881 transitions. Word has length 87 [2019-10-07 03:48:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:07,631 INFO L462 AbstractCegarLoop]: Abstraction has 15239 states and 22881 transitions. [2019-10-07 03:48:07,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:48:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 15239 states and 22881 transitions. [2019-10-07 03:48:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-07 03:48:07,641 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:07,641 INFO L385 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] [2019-10-07 03:48:07,642 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1504173418, now seen corresponding path program 1 times [2019-10-07 03:48:07,643 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:07,643 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:07,643 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:07,643 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:07,832 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:07,832 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:07,832 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:48:07,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:48:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:48:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:48:07,834 INFO L87 Difference]: Start difference. First operand 15239 states and 22881 transitions. Second operand 6 states. [2019-10-07 03:48:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:11,663 INFO L93 Difference]: Finished difference Result 35441 states and 54893 transitions. [2019-10-07 03:48:11,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:11,665 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 89 [2019-10-07 03:48:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:11,742 INFO L225 Difference]: With dead ends: 35441 [2019-10-07 03:48:11,743 INFO L226 Difference]: Without dead ends: 20207 [2019-10-07 03:48:11,789 INFO L606 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 [2019-10-07 03:48:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20207 states. [2019-10-07 03:48:12,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20207 to 15753. [2019-10-07 03:48:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15753 states. [2019-10-07 03:48:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15753 states to 15753 states and 22052 transitions. [2019-10-07 03:48:12,225 INFO L78 Accepts]: Start accepts. Automaton has 15753 states and 22052 transitions. Word has length 89 [2019-10-07 03:48:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:12,226 INFO L462 AbstractCegarLoop]: Abstraction has 15753 states and 22052 transitions. [2019-10-07 03:48:12,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:48:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 15753 states and 22052 transitions. [2019-10-07 03:48:12,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-07 03:48:12,244 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:12,244 INFO L385 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:12,245 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash 809737865, now seen corresponding path program 1 times [2019-10-07 03:48:12,246 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:12,246 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:12,246 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:12,249 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 03:48:12,403 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:12,404 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:12,404 INFO L95 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 [2019-10-07 03:48:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:12,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:48:12,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:48:12,637 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 03:48:12,770 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:48:12,836 INFO L162 IcfgInterpreter]: Started Sifa with 85 locations of interest [2019-10-07 03:48:12,836 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:48:12,844 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:48:12,858 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:48:12,859 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:48:13,070 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-07 03:48:13,236 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-10-07 03:48:13,381 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-10-07 03:48:13,490 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 35 [2019-10-07 03:48:13,622 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 35 [2019-10-07 03:48:14,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:14,039 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 03:48:14,051 INFO L168 Benchmark]: Toolchain (without parser) took 122510.84 ms. Allocated memory was 138.4 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 91.9 MB in the beginning and 566.0 MB in the end (delta: -474.1 MB). Peak memory consumption was 840.8 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:14,053 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:48:14,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2040.92 ms. Allocated memory was 138.4 MB in the beginning and 225.4 MB in the end (delta: 87.0 MB). Free memory was 91.7 MB in the beginning and 94.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 90.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:14,057 INFO L168 Benchmark]: Boogie Preprocessor took 312.08 ms. Allocated memory was 225.4 MB in the beginning and 257.9 MB in the end (delta: 32.5 MB). Free memory was 94.2 MB in the beginning and 204.5 MB in the end (delta: -110.3 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:14,061 INFO L168 Benchmark]: RCFGBuilder took 90816.46 ms. Allocated memory was 257.9 MB in the beginning and 1.1 GB in the end (delta: 843.6 MB). Free memory was 204.5 MB in the beginning and 570.2 MB in the end (delta: -365.7 MB). Peak memory consumption was 880.8 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:14,066 INFO L168 Benchmark]: TraceAbstraction took 29336.77 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 351.8 MB). Free memory was 570.2 MB in the beginning and 566.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 356.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:14,076 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2040.92 ms. Allocated memory was 138.4 MB in the beginning and 225.4 MB in the end (delta: 87.0 MB). Free memory was 91.7 MB in the beginning and 94.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 90.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 312.08 ms. Allocated memory was 225.4 MB in the beginning and 257.9 MB in the end (delta: 32.5 MB). Free memory was 94.2 MB in the beginning and 204.5 MB in the end (delta: -110.3 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 90816.46 ms. Allocated memory was 257.9 MB in the beginning and 1.1 GB in the end (delta: 843.6 MB). Free memory was 204.5 MB in the beginning and 570.2 MB in the end (delta: -365.7 MB). Peak memory consumption was 880.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29336.77 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 351.8 MB). Free memory was 570.2 MB in the beginning and 566.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 356.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...