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/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 02:44:55,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 02:44:55,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 02:44:55,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 02:44:55,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 02:44:55,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 02:44:55,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 02:44:55,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 02:44:55,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 02:44:55,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 02:44:55,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 02:44:55,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 02:44:55,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 02:44:55,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 02:44:55,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 02:44:55,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 02:44:55,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 02:44:55,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 02:44:55,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 02:44:55,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 02:44:55,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 02:44:55,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 02:44:55,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 02:44:55,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 02:44:55,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 02:44:55,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 02:44:55,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 02:44:55,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 02:44:55,256 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 02:44:55,274 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 02:44:55,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 02:44:55,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 02:44:55,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 02:44:55,275 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 02:44:55,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 02:44:55,276 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 02:44:55,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 02:44:55,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 02:44:55,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 02:44:55,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 02:44:55,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 02:44:55,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 02:44:55,277 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 02:44:55,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 02:44:55,278 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 02:44:55,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 02:44:55,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 02:44:55,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 02:44:55,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 02:44:55,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 02:44:55,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 02:44:55,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 02:44:55,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 02:44:55,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 02:44:55,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 02:44:55,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 02:44:55,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 02:44:55,280 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 02:44:55,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 02:44:55,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 02:44:55,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 02:44:55,602 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 02:44:55,602 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 02:44:55,603 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-10-07 02:44:55,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9c340fd/a74f2e58af644e86b92a2f2a0a047bf8/FLAG0588502f7 [2019-10-07 02:44:56,457 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 02:44:56,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-10-07 02:44:56,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9c340fd/a74f2e58af644e86b92a2f2a0a047bf8/FLAG0588502f7 [2019-10-07 02:44:56,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a9c340fd/a74f2e58af644e86b92a2f2a0a047bf8 [2019-10-07 02:44:57,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 02:44:57,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 02:44:57,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 02:44:57,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 02:44:57,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 02:44:57,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:44:56" (1/1) ... [2019-10-07 02:44:57,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d836b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:57, skipping insertion in model container [2019-10-07 02:44:57,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:44:56" (1/1) ... [2019-10-07 02:44:57,022 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 02:44:57,166 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 02:44:58,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:44:58,701 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 02:44:59,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 02:44:59,418 INFO L192 MainTranslator]: Completed translation [2019-10-07 02:44:59,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59 WrapperNode [2019-10-07 02:44:59,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 02:44:59,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 02:44:59,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 02:44:59,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 02:44:59,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (1/1) ... [2019-10-07 02:44:59,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 02:44:59,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 02:44:59,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 02:44:59,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 02:44:59,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (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 02:44:59,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 02:44:59,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 02:44:59,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 02:44:59,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 02:44:59,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 02:44:59,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-07 02:44:59,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 02:44:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 02:44:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 02:44:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 02:44:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-07 02:44:59,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 02:44:59,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 02:44:59,791 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 02:44:59,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 02:44:59,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 02:44:59,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 02:45:06,930 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 02:45:06,930 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 02:45:06,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:45:06 BoogieIcfgContainer [2019-10-07 02:45:06,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 02:45:06,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 02:45:06,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 02:45:06,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 02:45:06,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:44:56" (1/3) ... [2019-10-07 02:45:06,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191bfc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:45:06, skipping insertion in model container [2019-10-07 02:45:06,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:44:59" (2/3) ... [2019-10-07 02:45:06,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@191bfc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:45:06, skipping insertion in model container [2019-10-07 02:45:06,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:45:06" (3/3) ... [2019-10-07 02:45:06,940 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2019-10-07 02:45:06,947 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 02:45:06,954 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 02:45:06,965 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 02:45:07,000 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 02:45:07,000 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 02:45:07,000 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 02:45:07,000 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 02:45:07,001 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 02:45:07,001 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 02:45:07,001 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 02:45:07,001 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 02:45:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-07 02:45:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 02:45:07,043 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:07,044 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 02:45:07,046 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:07,052 INFO L82 PathProgramCache]: Analyzing trace with hash -874915506, now seen corresponding path program 1 times [2019-10-07 02:45:07,061 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:07,062 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:07,062 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:07,062 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:07,269 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 02:45:07,270 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:07,270 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:45:07,271 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 02:45:07,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 02:45:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 02:45:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 02:45:07,292 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-07 02:45:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:45:12,966 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-07 02:45:12,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 02:45:12,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 02:45:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:45:13,001 INFO L225 Difference]: With dead ends: 2068 [2019-10-07 02:45:13,001 INFO L226 Difference]: Without dead ends: 1371 [2019-10-07 02:45:13,015 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 02:45:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-07 02:45:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2019-10-07 02:45:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2019-10-07 02:45:13,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2628 transitions. [2019-10-07 02:45:13,166 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2628 transitions. Word has length 11 [2019-10-07 02:45:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:45:13,166 INFO L462 AbstractCegarLoop]: Abstraction has 1367 states and 2628 transitions. [2019-10-07 02:45:13,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 02:45:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2628 transitions. [2019-10-07 02:45:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-07 02:45:13,168 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:13,169 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 02:45:13,169 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:13,170 INFO L82 PathProgramCache]: Analyzing trace with hash -945933364, now seen corresponding path program 1 times [2019-10-07 02:45:13,170 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:13,170 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:13,170 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:13,170 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:13,304 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 02:45:13,305 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:13,305 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:45:13,305 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 02:45:13,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:45:13,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:45:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 02:45:13,308 INFO L87 Difference]: Start difference. First operand 1367 states and 2628 transitions. Second operand 5 states. [2019-10-07 02:45:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:45:20,585 INFO L93 Difference]: Finished difference Result 4145 states and 7983 transitions. [2019-10-07 02:45:20,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 02:45:20,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-07 02:45:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:45:20,609 INFO L225 Difference]: With dead ends: 4145 [2019-10-07 02:45:20,609 INFO L226 Difference]: Without dead ends: 2783 [2019-10-07 02:45:20,613 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:45:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2019-10-07 02:45:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2754. [2019-10-07 02:45:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2754 states. [2019-10-07 02:45:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4674 transitions. [2019-10-07 02:45:20,723 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4674 transitions. Word has length 21 [2019-10-07 02:45:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:45:20,724 INFO L462 AbstractCegarLoop]: Abstraction has 2754 states and 4674 transitions. [2019-10-07 02:45:20,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:45:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4674 transitions. [2019-10-07 02:45:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-07 02:45:20,726 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:20,726 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] [2019-10-07 02:45:20,727 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash 821506528, now seen corresponding path program 1 times [2019-10-07 02:45:20,730 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:20,732 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:20,733 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:20,733 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 02:45:20,887 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:20,887 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:45:20,887 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 02:45:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:20,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-07 02:45:20,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:45:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-07 02:45:21,035 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:45:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-07 02:45:21,257 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 02:45:21,258 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 11 [2019-10-07 02:45:21,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 02:45:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 02:45:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 02:45:21,259 INFO L87 Difference]: Start difference. First operand 2754 states and 4674 transitions. Second operand 4 states. [2019-10-07 02:45:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:45:27,579 INFO L93 Difference]: Finished difference Result 8312 states and 14286 transitions. [2019-10-07 02:45:27,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 02:45:27,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-07 02:45:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:45:27,610 INFO L225 Difference]: With dead ends: 8312 [2019-10-07 02:45:27,610 INFO L226 Difference]: Without dead ends: 5563 [2019-10-07 02:45:27,617 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 02:45:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2019-10-07 02:45:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5402. [2019-10-07 02:45:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5402 states. [2019-10-07 02:45:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 8101 transitions. [2019-10-07 02:45:27,757 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 8101 transitions. Word has length 27 [2019-10-07 02:45:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:45:27,758 INFO L462 AbstractCegarLoop]: Abstraction has 5402 states and 8101 transitions. [2019-10-07 02:45:27,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 02:45:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 8101 transitions. [2019-10-07 02:45:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-07 02:45:27,762 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:27,762 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] [2019-10-07 02:45:27,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:27,966 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2080223329, now seen corresponding path program 1 times [2019-10-07 02:45:27,967 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:27,967 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:27,968 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:27,968 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:28,242 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 02:45:28,243 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:28,243 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 02:45:28,243 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 02:45:28,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 02:45:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 02:45:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 02:45:28,245 INFO L87 Difference]: Start difference. First operand 5402 states and 8101 transitions. Second operand 6 states. [2019-10-07 02:45:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:45:35,868 INFO L93 Difference]: Finished difference Result 16499 states and 25934 transitions. [2019-10-07 02:45:35,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 02:45:35,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-10-07 02:45:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:45:35,936 INFO L225 Difference]: With dead ends: 16499 [2019-10-07 02:45:35,936 INFO L226 Difference]: Without dead ends: 11102 [2019-10-07 02:45:35,951 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 02:45:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11102 states. [2019-10-07 02:45:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11102 to 10360. [2019-10-07 02:45:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10360 states. [2019-10-07 02:45:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10360 states to 10360 states and 15625 transitions. [2019-10-07 02:45:36,305 INFO L78 Accepts]: Start accepts. Automaton has 10360 states and 15625 transitions. Word has length 72 [2019-10-07 02:45:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:45:36,306 INFO L462 AbstractCegarLoop]: Abstraction has 10360 states and 15625 transitions. [2019-10-07 02:45:36,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 02:45:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10360 states and 15625 transitions. [2019-10-07 02:45:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-07 02:45:36,319 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:36,319 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2019-10-07 02:45:36,320 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1400976341, now seen corresponding path program 1 times [2019-10-07 02:45:36,321 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:36,321 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:36,321 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:36,321 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 02:45:36,543 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:36,543 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:45:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:36,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 02:45:36,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:45:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 02:45:36,719 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:45:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 02:45:36,831 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 02:45:36,831 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 02:45:36,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 02:45:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 02:45:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-07 02:45:36,833 INFO L87 Difference]: Start difference. First operand 10360 states and 15625 transitions. Second operand 5 states. [2019-10-07 02:45:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 02:45:44,935 INFO L93 Difference]: Finished difference Result 30712 states and 49021 transitions. [2019-10-07 02:45:44,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 02:45:44,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2019-10-07 02:45:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 02:45:45,032 INFO L225 Difference]: With dead ends: 30712 [2019-10-07 02:45:45,033 INFO L226 Difference]: Without dead ends: 20357 [2019-10-07 02:45:45,064 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-07 02:45:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20357 states. [2019-10-07 02:45:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20357 to 19039. [2019-10-07 02:45:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19039 states. [2019-10-07 02:45:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19039 states to 19039 states and 27973 transitions. [2019-10-07 02:45:45,565 INFO L78 Accepts]: Start accepts. Automaton has 19039 states and 27973 transitions. Word has length 84 [2019-10-07 02:45:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 02:45:45,565 INFO L462 AbstractCegarLoop]: Abstraction has 19039 states and 27973 transitions. [2019-10-07 02:45:45,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 02:45:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 19039 states and 27973 transitions. [2019-10-07 02:45:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-07 02:45:45,568 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 02:45:45,569 INFO L385 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 02:45:45,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:45,774 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 02:45:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 02:45:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash 168986585, now seen corresponding path program 1 times [2019-10-07 02:45:45,774 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 02:45:45,774 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:45,775 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:45,775 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 02:45:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 02:45:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-07 02:45:46,038 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 02:45:46,039 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 02:45:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 02:45:46,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 02:45:46,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 02:45:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-07 02:45:46,237 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 02:45:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 42 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-07 02:45:46,368 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 02:45:46,424 INFO L162 IcfgInterpreter]: Started Sifa with 50 locations of interest [2019-10-07 02:45:46,424 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 02:45:46,431 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 02:45:46,441 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 02:45:46,451 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 02:45:46,674 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2019-10-07 02:45:46,834 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2019-10-07 02:45:46,886 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2019-10-07 02:45:46,933 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2019-10-07 02:45:47,211 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2019-10-07 02:45:47,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 02:45:47,713 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 02:45:47,718 INFO L168 Benchmark]: Toolchain (without parser) took 50712.77 ms. Allocated memory was 137.9 MB in the beginning and 811.6 MB in the end (delta: 673.7 MB). Free memory was 88.3 MB in the beginning and 324.9 MB in the end (delta: -236.6 MB). Peak memory consumption was 437.1 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:47,719 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 02:45:47,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2412.85 ms. Allocated memory was 137.9 MB in the beginning and 261.6 MB in the end (delta: 123.7 MB). Free memory was 88.1 MB in the beginning and 202.8 MB in the end (delta: -114.7 MB). Peak memory consumption was 123.4 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:47,721 INFO L168 Benchmark]: Boogie Preprocessor took 300.12 ms. Allocated memory is still 261.6 MB. Free memory was 202.8 MB in the beginning and 174.8 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:47,722 INFO L168 Benchmark]: RCFGBuilder took 7212.50 ms. Allocated memory was 261.6 MB in the beginning and 378.5 MB in the end (delta: 116.9 MB). Free memory was 174.8 MB in the beginning and 224.8 MB in the end (delta: -50.0 MB). Peak memory consumption was 216.9 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:47,723 INFO L168 Benchmark]: TraceAbstraction took 40782.67 ms. Allocated memory was 378.5 MB in the beginning and 811.6 MB in the end (delta: 433.1 MB). Free memory was 224.8 MB in the beginning and 324.9 MB in the end (delta: -100.2 MB). Peak memory consumption was 332.9 MB. Max. memory is 7.1 GB. [2019-10-07 02:45:47,728 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 137.9 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2412.85 ms. Allocated memory was 137.9 MB in the beginning and 261.6 MB in the end (delta: 123.7 MB). Free memory was 88.1 MB in the beginning and 202.8 MB in the end (delta: -114.7 MB). Peak memory consumption was 123.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 300.12 ms. Allocated memory is still 261.6 MB. Free memory was 202.8 MB in the beginning and 174.8 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7212.50 ms. Allocated memory was 261.6 MB in the beginning and 378.5 MB in the end (delta: 116.9 MB). Free memory was 174.8 MB in the beginning and 224.8 MB in the end (delta: -50.0 MB). Peak memory consumption was 216.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40782.67 ms. Allocated memory was 378.5 MB in the beginning and 811.6 MB in the end (delta: 433.1 MB). Free memory was 224.8 MB in the beginning and 324.9 MB in the end (delta: -100.2 MB). Peak memory consumption was 332.9 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...