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/Problem15_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:55:11,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:55:11,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:55:11,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:55:11,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:55:11,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:55:11,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:55:11,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:55:11,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:55:11,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:55:11,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:55:11,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:55:11,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:55:11,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:55:11,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:55:11,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:55:11,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:55:11,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:55:11,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:55:11,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:55:11,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:55:11,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:55:11,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:55:11,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:55:11,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:55:11,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:55:11,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:55:11,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:55:11,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:55:11,240 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:55:11,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:55:11,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:55:11,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:55:11,242 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:55:11,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:55:11,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:55:11,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:55:11,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:55:11,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:55:11,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:55:11,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:55:11,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:55:11,248 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:55:11,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:55:11,249 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:55:11,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:55:11,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:55:11,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:55:11,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:55:11,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:55:11,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:11,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:55:11,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:55:11,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:55:11,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:55:11,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:55:11,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:55:11,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:55:11,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:11,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:11,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:11,535 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:11,535 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:11,536 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-15 01:55:11,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1860b5208/cc2ee59826ff470ea8975823d664e42f/FLAG3b01412dd [2019-10-15 01:55:12,195 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:12,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-15 01:55:12,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1860b5208/cc2ee59826ff470ea8975823d664e42f/FLAG3b01412dd [2019-10-15 01:55:12,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1860b5208/cc2ee59826ff470ea8975823d664e42f [2019-10-15 01:55:12,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:12,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:12,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:12,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:12,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:12,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:12" (1/1) ... [2019-10-15 01:55:12,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2b4d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:12, skipping insertion in model container [2019-10-15 01:55:12,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:12" (1/1) ... [2019-10-15 01:55:12,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:12,526 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:13,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:13,330 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:13,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:13,659 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:13,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13 WrapperNode [2019-10-15 01:55:13,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:13,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:13,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:13,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:13,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (1/1) ... [2019-10-15 01:55:13,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:13,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:13,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:13,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:13,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (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 [2019-10-15 01:55:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:13,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:13,927 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:13,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:13,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:13,929 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:21,945 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:21,945 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:21,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:21 BoogieIcfgContainer [2019-10-15 01:55:21,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:21,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:21,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:21,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:21,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:12" (1/3) ... [2019-10-15 01:55:21,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d256c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:21, skipping insertion in model container [2019-10-15 01:55:21,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:13" (2/3) ... [2019-10-15 01:55:21,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d256c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:21, skipping insertion in model container [2019-10-15 01:55:21,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:21" (3/3) ... [2019-10-15 01:55:21,955 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label53.c [2019-10-15 01:55:21,965 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:21,974 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:21,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:22,016 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:22,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:22,017 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:22,017 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:22,017 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:22,017 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:22,017 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:22,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:22,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:22,059 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:22,061 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 648051309, now seen corresponding path program 1 times [2019-10-15 01:55:22,072 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:22,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635882070] [2019-10-15 01:55:22,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:22,073 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:22,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:22,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635882070] [2019-10-15 01:55:22,291 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:22,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:22,292 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134047471] [2019-10-15 01:55:22,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:22,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:22,314 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:55:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:25,709 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:55:25,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:25,711 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:55:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:25,745 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:55:25,746 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:55:25,753 INFO L600 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 [2019-10-15 01:55:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:55:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 469. [2019-10-15 01:55:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-15 01:55:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2019-10-15 01:55:25,833 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2019-10-15 01:55:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:25,834 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2019-10-15 01:55:25,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2019-10-15 01:55:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:55:25,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:25,836 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:25,836 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash 514546391, now seen corresponding path program 1 times [2019-10-15 01:55:25,837 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:25,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214066879] [2019-10-15 01:55:25,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:25,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:25,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:26,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214066879] [2019-10-15 01:55:26,006 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:26,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:55:26,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377256557] [2019-10-15 01:55:26,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:55:26,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:55:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:26,009 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand 6 states. [2019-10-15 01:55:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:30,455 INFO L93 Difference]: Finished difference Result 1415 states and 2520 transitions. [2019-10-15 01:55:30,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:30,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-15 01:55:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:30,463 INFO L225 Difference]: With dead ends: 1415 [2019-10-15 01:55:30,464 INFO L226 Difference]: Without dead ends: 951 [2019-10-15 01:55:30,469 INFO L600 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 [2019-10-15 01:55:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2019-10-15 01:55:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 919. [2019-10-15 01:55:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2019-10-15 01:55:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1578 transitions. [2019-10-15 01:55:30,548 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1578 transitions. Word has length 23 [2019-10-15 01:55:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:30,549 INFO L462 AbstractCegarLoop]: Abstraction has 919 states and 1578 transitions. [2019-10-15 01:55:30,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:55:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1578 transitions. [2019-10-15 01:55:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:55:30,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:30,550 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:30,550 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash 718224572, now seen corresponding path program 1 times [2019-10-15 01:55:30,552 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:30,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833617136] [2019-10-15 01:55:30,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:30,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:30,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:30,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833617136] [2019-10-15 01:55:30,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:30,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:30,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223077550] [2019-10-15 01:55:30,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:30,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:30,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:30,691 INFO L87 Difference]: Start difference. First operand 919 states and 1578 transitions. Second operand 5 states. [2019-10-15 01:55:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:36,327 INFO L93 Difference]: Finished difference Result 2785 states and 4883 transitions. [2019-10-15 01:55:36,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:36,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-15 01:55:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:36,337 INFO L225 Difference]: With dead ends: 2785 [2019-10-15 01:55:36,338 INFO L226 Difference]: Without dead ends: 1871 [2019-10-15 01:55:36,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2019-10-15 01:55:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1396. [2019-10-15 01:55:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2019-10-15 01:55:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2170 transitions. [2019-10-15 01:55:36,391 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2170 transitions. Word has length 24 [2019-10-15 01:55:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:36,391 INFO L462 AbstractCegarLoop]: Abstraction has 1396 states and 2170 transitions. [2019-10-15 01:55:36,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2170 transitions. [2019-10-15 01:55:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:55:36,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:36,393 INFO L380 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] [2019-10-15 01:55:36,393 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash 264123308, now seen corresponding path program 1 times [2019-10-15 01:55:36,394 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:36,394 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136362616] [2019-10-15 01:55:36,394 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:36,394 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:36,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:36,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136362616] [2019-10-15 01:55:36,525 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:36,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:36,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369040231] [2019-10-15 01:55:36,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:36,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:36,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:36,527 INFO L87 Difference]: Start difference. First operand 1396 states and 2170 transitions. Second operand 4 states. [2019-10-15 01:55:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:43,130 INFO L93 Difference]: Finished difference Result 5322 states and 8526 transitions. [2019-10-15 01:55:43,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:43,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 01:55:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:43,155 INFO L225 Difference]: With dead ends: 5322 [2019-10-15 01:55:43,155 INFO L226 Difference]: Without dead ends: 3931 [2019-10-15 01:55:43,160 INFO L600 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 [2019-10-15 01:55:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2019-10-15 01:55:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3484. [2019-10-15 01:55:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3484 states. [2019-10-15 01:55:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 5419 transitions. [2019-10-15 01:55:43,321 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 5419 transitions. Word has length 32 [2019-10-15 01:55:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:43,321 INFO L462 AbstractCegarLoop]: Abstraction has 3484 states and 5419 transitions. [2019-10-15 01:55:43,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 5419 transitions. [2019-10-15 01:55:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-15 01:55:43,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:43,329 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:55:43,329 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1046155695, now seen corresponding path program 1 times [2019-10-15 01:55:43,331 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:43,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196944229] [2019-10-15 01:55:43,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:43,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:43,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 01:55:43,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196944229] [2019-10-15 01:55:43,452 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:43,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:43,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092800123] [2019-10-15 01:55:43,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:43,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:43,453 INFO L87 Difference]: Start difference. First operand 3484 states and 5419 transitions. Second operand 4 states. [2019-10-15 01:55:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:46,769 INFO L93 Difference]: Finished difference Result 12069 states and 19177 transitions. [2019-10-15 01:55:46,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:46,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2019-10-15 01:55:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:46,814 INFO L225 Difference]: With dead ends: 12069 [2019-10-15 01:55:46,814 INFO L226 Difference]: Without dead ends: 8590 [2019-10-15 01:55:46,825 INFO L600 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 [2019-10-15 01:55:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8590 states. [2019-10-15 01:55:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8590 to 7905. [2019-10-15 01:55:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7905 states. [2019-10-15 01:55:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7905 states to 7905 states and 11680 transitions. [2019-10-15 01:55:47,032 INFO L78 Accepts]: Start accepts. Automaton has 7905 states and 11680 transitions. Word has length 51 [2019-10-15 01:55:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:47,033 INFO L462 AbstractCegarLoop]: Abstraction has 7905 states and 11680 transitions. [2019-10-15 01:55:47,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7905 states and 11680 transitions. [2019-10-15 01:55:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-10-15 01:55:47,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:47,042 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:47,042 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:47,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1497158940, now seen corresponding path program 1 times [2019-10-15 01:55:47,043 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:47,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021354739] [2019-10-15 01:55:47,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:47,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:47,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 69 proven. 20 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 01:55:47,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021354739] [2019-10-15 01:55:47,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379931480] [2019-10-15 01:55:47,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:47,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:47,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:55:47,673 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 69 proven. 20 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 01:55:47,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032649055] [2019-10-15 01:55:47,874 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:47,874 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:47,886 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:47,907 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:47,908 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:48,123 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:48,365 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:55:48,682 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-15 01:55:48,924 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:55:49,079 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-15 01:55:50,307 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs