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/Problem16_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:44,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:44,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:44,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:56:44,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:56:44,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:56:44,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:56:44,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:56:44,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:56:44,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:56:44,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:56:44,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:56:44,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:44,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:44,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:44,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:44,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:44,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:44,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:44,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:44,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:44,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:44,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:44,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:44,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:56:44,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:56:44,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:56:44,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:56:44,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:56:44,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:56:44,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:56:44,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:56:44,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:56:44,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:56:44,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:56:44,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:56:44,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:56:44,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:56:44,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:44,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:44,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:44,634 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 01:56:44,660 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:44,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:44,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:44,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:44,662 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:44,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:44,663 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:44,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:44,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:44,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:44,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:44,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:44,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:44,666 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:44,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:44,666 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:44,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:44,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:44,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:44,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:44,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:44,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:44,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:44,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:44,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:44,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:44,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:44,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:44,668 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 01:56:44,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:44,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:44,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:44,990 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:44,990 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:44,991 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-15 01:56:45,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bcebd141/76aba1fb652045fa97daad0f1225a3c7/FLAG98be7bbec [2019-10-15 01:56:45,752 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:45,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-10-15 01:56:45,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bcebd141/76aba1fb652045fa97daad0f1225a3c7/FLAG98be7bbec [2019-10-15 01:56:45,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bcebd141/76aba1fb652045fa97daad0f1225a3c7 [2019-10-15 01:56:45,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:45,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:45,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:45,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:45,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:45,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:45" (1/1) ... [2019-10-15 01:56:45,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b9ebb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:45, skipping insertion in model container [2019-10-15 01:56:45,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:45" (1/1) ... [2019-10-15 01:56:45,981 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:46,057 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:46,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:46,815 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:47,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:47,222 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:47,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47 WrapperNode [2019-10-15 01:56:47,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:47,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:47,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:47,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:47,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (1/1) ... [2019-10-15 01:56:47,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:47,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:47,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:47,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:47,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (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 01:56:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:47,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:47,520 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:47,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:47,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:57:08,414 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:57:08,415 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:57:08,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:08 BoogieIcfgContainer [2019-10-15 01:57:08,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:57:08,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:57:08,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:57:08,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:57:08,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:45" (1/3) ... [2019-10-15 01:57:08,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63325fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:08, skipping insertion in model container [2019-10-15 01:57:08,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:47" (2/3) ... [2019-10-15 01:57:08,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63325fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:08, skipping insertion in model container [2019-10-15 01:57:08,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:08" (3/3) ... [2019-10-15 01:57:08,426 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label58.c [2019-10-15 01:57:08,436 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:57:08,444 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:57:08,455 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:57:08,482 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:57:08,482 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:57:08,482 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:57:08,483 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:57:08,483 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:57:08,547 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:57:08,547 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:57:08,547 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:57:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:57:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:57:08,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:08,598 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:08,600 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash 863565887, now seen corresponding path program 1 times [2019-10-15 01:57:08,612 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:08,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134780710] [2019-10-15 01:57:08,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:08,613 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:08,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:08,818 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 01:57:08,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134780710] [2019-10-15 01:57:08,820 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:08,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:57:08,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404434629] [2019-10-15 01:57:08,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:57:08,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:57:08,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:57:08,842 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:57:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:10,672 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:57:10,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:57:10,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:57:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:10,695 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:57:10,695 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:57:10,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:57:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:57:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-15 01:57:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-15 01:57:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-15 01:57:10,792 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-15 01:57:10,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:10,793 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-15 01:57:10,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:57:10,793 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-15 01:57:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:57:10,796 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:10,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:10,797 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash 650473814, now seen corresponding path program 1 times [2019-10-15 01:57:10,798 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:10,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134153514] [2019-10-15 01:57:10,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:10,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:10,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:11,067 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 01:57:11,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134153514] [2019-10-15 01:57:11,068 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:11,068 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:11,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20900458] [2019-10-15 01:57:11,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:11,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:11,073 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-15 01:57:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:13,328 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-15 01:57:13,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:13,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-15 01:57:13,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:13,341 INFO L225 Difference]: With dead ends: 1390 [2019-10-15 01:57:13,341 INFO L226 Difference]: Without dead ends: 933 [2019-10-15 01:57:13,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-15 01:57:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-15 01:57:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-15 01:57:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-15 01:57:13,412 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-15 01:57:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:13,413 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-15 01:57:13,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-15 01:57:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 01:57:13,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:13,417 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:13,417 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash 731138659, now seen corresponding path program 1 times [2019-10-15 01:57:13,418 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:13,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019812553] [2019-10-15 01:57:13,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:13,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:13,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:13,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019812553] [2019-10-15 01:57:13,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186600549] [2019-10-15 01:57:13,641 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 01:57:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:13,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:13,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:13,837 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:13,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:13,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:13,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327706494] [2019-10-15 01:57:13,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:13,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:13,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:13,948 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-15 01:57:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:15,979 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-15 01:57:15,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:15,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-15 01:57:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:15,989 INFO L225 Difference]: With dead ends: 2074 [2019-10-15 01:57:15,989 INFO L226 Difference]: Without dead ends: 1162 [2019-10-15 01:57:15,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:15,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-15 01:57:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-15 01:57:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-15 01:57:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-15 01:57:16,035 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-15 01:57:16,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:16,036 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-15 01:57:16,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-15 01:57:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 01:57:16,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:16,041 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:57:16,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:16,254 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:16,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1629527589, now seen corresponding path program 1 times [2019-10-15 01:57:16,255 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:16,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946026337] [2019-10-15 01:57:16,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:16,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:16,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:16,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946026337] [2019-10-15 01:57:16,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571580927] [2019-10-15 01:57:16,457 INFO L94 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 [2019-10-15 01:57:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:16,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:16,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:16,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:16,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 01:57:16,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634912333] [2019-10-15 01:57:16,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:16,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:16,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:16,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:16,707 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-15 01:57:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:20,032 INFO L93 Difference]: Finished difference Result 3268 states and 5829 transitions. [2019-10-15 01:57:20,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:20,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-15 01:57:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:20,046 INFO L225 Difference]: With dead ends: 3268 [2019-10-15 01:57:20,047 INFO L226 Difference]: Without dead ends: 2121 [2019-10-15 01:57:20,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:57:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2019-10-15 01:57:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2055. [2019-10-15 01:57:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-15 01:57:20,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3464 transitions. [2019-10-15 01:57:20,116 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3464 transitions. Word has length 111 [2019-10-15 01:57:20,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:20,116 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3464 transitions. [2019-10-15 01:57:20,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3464 transitions. [2019-10-15 01:57:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:57:20,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:20,120 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:57:20,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:20,326 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1098956707, now seen corresponding path program 1 times [2019-10-15 01:57:20,328 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:20,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967207135] [2019-10-15 01:57:20,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:20,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:20,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:20,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967207135] [2019-10-15 01:57:20,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612551420] [2019-10-15 01:57:20,430 INFO L94 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 [2019-10-15 01:57:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:20,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:57:20,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:57:20,573 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 01:57:20,652 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:57:20,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:57:20,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139147344] [2019-10-15 01:57:20,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:20,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:57:20,654 INFO L87 Difference]: Start difference. First operand 2055 states and 3464 transitions. Second operand 5 states. [2019-10-15 01:57:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:22,958 INFO L93 Difference]: Finished difference Result 5971 states and 10343 transitions. [2019-10-15 01:57:22,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:22,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-15 01:57:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:22,979 INFO L225 Difference]: With dead ends: 5971 [2019-10-15 01:57:22,979 INFO L226 Difference]: Without dead ends: 3921 [2019-10-15 01:57:22,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:57:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-15 01:57:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-15 01:57:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-15 01:57:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5866 transitions. [2019-10-15 01:57:23,101 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5866 transitions. Word has length 115 [2019-10-15 01:57:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:23,102 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5866 transitions. [2019-10-15 01:57:23,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5866 transitions. [2019-10-15 01:57:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 01:57:23,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:23,107 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:23,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:23,313 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1844818613, now seen corresponding path program 1 times [2019-10-15 01:57:23,314 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:23,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33594472] [2019-10-15 01:57:23,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:23,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:23,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:23,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33594472] [2019-10-15 01:57:23,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315765160] [2019-10-15 01:57:23,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:24,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:24,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:24,114 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:24,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887522391] [2019-10-15 01:57:24,293 INFO L162 IcfgInterpreter]: Started Sifa with 163 locations of interest [2019-10-15 01:57:24,293 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:57:24,300 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:57:24,308 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:57:24,308 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:57:24,512 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-15 01:57:24,774 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 45