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/Problem02_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:39,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:42:39,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:42:39,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:42:39,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:42:39,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:42:39,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:42:39,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:42:39,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:42:39,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:42:39,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:42:39,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:42:39,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:39,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:39,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:39,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:39,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:39,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:39,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:39,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:39,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:39,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:39,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:39,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:39,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:42:39,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:42:39,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:42:39,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:42:39,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:42:39,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:42:39,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:42:39,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:42:39,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:42:39,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:42:39,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:42:39,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:42:39,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:42:39,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:42:39,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:39,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:39,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:39,272 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 01:42:39,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:39,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:39,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:39,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:39,297 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:39,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:39,297 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:39,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:39,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:39,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:39,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:39,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:39,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:39,299 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:39,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:39,300 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:39,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:39,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:39,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:39,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:39,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:39,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:39,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:39,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:39,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:39,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:39,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:39,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:39,302 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 01:42:39,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:39,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:39,623 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:39,624 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:39,625 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:39,625 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label46.c [2019-10-15 01:42:39,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b9d6a0b/af5edb2ff16d41c78d8a791073eddf77/FLAG22f3f4888 [2019-10-15 01:42:40,256 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:40,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label46.c [2019-10-15 01:42:40,285 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b9d6a0b/af5edb2ff16d41c78d8a791073eddf77/FLAG22f3f4888 [2019-10-15 01:42:40,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b9d6a0b/af5edb2ff16d41c78d8a791073eddf77 [2019-10-15 01:42:40,536 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:40,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:40,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:40,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:40,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:40,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da87ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:40, skipping insertion in model container [2019-10-15 01:42:40,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:40" (1/1) ... [2019-10-15 01:42:40,558 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:40,614 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:41,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:41,226 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:41,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:41,371 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:41,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41 WrapperNode [2019-10-15 01:42:41,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:41,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:41,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:41,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:41,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (1/1) ... [2019-10-15 01:42:41,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:41,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:41,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:41,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:41,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (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 01:42:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:41,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:41,616 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:41,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:41,617 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:41,618 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:43,680 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:43,680 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:43,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:43 BoogieIcfgContainer [2019-10-15 01:42:43,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:43,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:43,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:43,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:43,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:40" (1/3) ... [2019-10-15 01:42:43,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f73abad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:43, skipping insertion in model container [2019-10-15 01:42:43,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:41" (2/3) ... [2019-10-15 01:42:43,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f73abad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:43, skipping insertion in model container [2019-10-15 01:42:43,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:43" (3/3) ... [2019-10-15 01:42:43,692 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label46.c [2019-10-15 01:42:43,703 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:43,711 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:43,723 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:43,751 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:43,751 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:43,752 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:43,752 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:43,752 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:43,752 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:43,752 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:43,753 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:43,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,795 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:43,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,803 INFO L82 PathProgramCache]: Analyzing trace with hash -219362505, now seen corresponding path program 1 times [2019-10-15 01:42:43,811 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50557349] [2019-10-15 01:42:43,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:44,321 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 01:42:44,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50557349] [2019-10-15 01:42:44,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:44,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:44,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704604656] [2019-10-15 01:42:44,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:44,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:44,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:44,356 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:45,040 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:45,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:45,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:45,068 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:45,068 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:45,076 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 01:42:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 317 transitions. [2019-10-15 01:42:45,182 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 317 transitions. Word has length 86 [2019-10-15 01:42:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:45,184 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 317 transitions. [2019-10-15 01:42:45,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 317 transitions. [2019-10-15 01:42:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-15 01:42:45,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:45,198 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:45,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1078692930, now seen corresponding path program 1 times [2019-10-15 01:42:45,202 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:45,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193067429] [2019-10-15 01:42:45,202 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:45,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193067429] [2019-10-15 01:42:45,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:45,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:45,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269585453] [2019-10-15 01:42:45,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:45,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:45,394 INFO L87 Difference]: Start difference. First operand 175 states and 317 transitions. Second operand 3 states. [2019-10-15 01:42:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:45,782 INFO L93 Difference]: Finished difference Result 513 states and 952 transitions. [2019-10-15 01:42:45,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:45,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-15 01:42:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:45,793 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:45,794 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:45,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:42:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:42:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 605 transitions. [2019-10-15 01:42:45,851 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 605 transitions. Word has length 95 [2019-10-15 01:42:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:45,852 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 605 transitions. [2019-10-15 01:42:45,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 605 transitions. [2019-10-15 01:42:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:42:45,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:45,857 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:42:45,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1307300961, now seen corresponding path program 1 times [2019-10-15 01:42:45,858 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:45,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292594933] [2019-10-15 01:42:45,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:45,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:45,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292594933] [2019-10-15 01:42:45,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:45,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:45,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589038032] [2019-10-15 01:42:45,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:45,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:45,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:45,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:45,971 INFO L87 Difference]: Start difference. First operand 343 states and 605 transitions. Second operand 6 states. [2019-10-15 01:42:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:46,605 INFO L93 Difference]: Finished difference Result 1055 states and 1968 transitions. [2019-10-15 01:42:46,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:46,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:42:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:46,613 INFO L225 Difference]: With dead ends: 1055 [2019-10-15 01:42:46,614 INFO L226 Difference]: Without dead ends: 717 [2019-10-15 01:42:46,618 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 01:42:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2019-10-15 01:42:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 699. [2019-10-15 01:42:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-15 01:42:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1219 transitions. [2019-10-15 01:42:46,724 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1219 transitions. Word has length 108 [2019-10-15 01:42:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:46,726 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 1219 transitions. [2019-10-15 01:42:46,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1219 transitions. [2019-10-15 01:42:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 01:42:46,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:46,735 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:42:46,735 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:46,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:46,736 INFO L82 PathProgramCache]: Analyzing trace with hash -650187165, now seen corresponding path program 1 times [2019-10-15 01:42:46,736 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:46,736 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027249015] [2019-10-15 01:42:46,736 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:46,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:46,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:46,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027249015] [2019-10-15 01:42:46,856 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:46,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:46,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798027167] [2019-10-15 01:42:46,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:46,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:46,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:46,858 INFO L87 Difference]: Start difference. First operand 699 states and 1219 transitions. Second operand 3 states. [2019-10-15 01:42:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:47,314 INFO L93 Difference]: Finished difference Result 1393 states and 2457 transitions. [2019-10-15 01:42:47,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:47,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-15 01:42:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:47,322 INFO L225 Difference]: With dead ends: 1393 [2019-10-15 01:42:47,322 INFO L226 Difference]: Without dead ends: 699 [2019-10-15 01:42:47,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-15 01:42:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 699. [2019-10-15 01:42:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-15 01:42:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1128 transitions. [2019-10-15 01:42:47,366 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1128 transitions. Word has length 110 [2019-10-15 01:42:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:47,367 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 1128 transitions. [2019-10-15 01:42:47,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1128 transitions. [2019-10-15 01:42:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 01:42:47,372 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:47,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:47,373 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:47,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1860592740, now seen corresponding path program 1 times [2019-10-15 01:42:47,374 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:47,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885869028] [2019-10-15 01:42:47,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:47,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:47,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:47,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885869028] [2019-10-15 01:42:47,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413146372] [2019-10-15 01:42:47,615 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 01:42:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:47,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:47,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:47,822 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:47,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750703486] [2019-10-15 01:42:47,960 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:47,960 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:47,968 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:47,981 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:47,982 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:48,338 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-15 01:42:50,620 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 86 for LOIs [2019-10-15 01:42:59,084 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 23 [2019-10-15 01:42:59,303 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11216 conjuctions. This might take some time... [2019-10-15 01:42:59,848 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2019-10-15 01:43:00,100 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11704 conjuctions. This might take some time... [2019-10-15 01:43:00,655 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2019-10-15 01:43:00,899 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11704 conjuctions. This might take some time... [2019-10-15 01:43:01,568 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:01,581 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:01,868 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-10-15 01:43:02,114 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:02,428 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:02,784 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2019-10-15 01:43:03,102 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 85 [2019-10-15 01:43:03,403 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:43:03,643 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2019-10-15 01:43:03,898 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2019-10-15 01:43:04,250 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2019-10-15 01:43:05,058 WARN L191 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2019-10-15 01:43:05,302 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2019-10-15 01:43:08,163 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:08,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 23 [2019-10-15 01:43:08,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133746764] [2019-10-15 01:43:08,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:43:08,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:43:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:43:08,166 INFO L87 Difference]: Start difference. First operand 699 states and 1128 transitions. Second operand 23 states. [2019-10-15 01:43:08,487 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:08,869 WARN L191 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:43:09,273 WARN L191 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:43:09,746 WARN L191 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2019-10-15 01:43:10,059 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:43:10,410 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:43:12,079 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-10-15 01:43:12,420 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-10-15 01:43:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:16,778 INFO L93 Difference]: Finished difference Result 2226 states and 3705 transitions. [2019-10-15 01:43:16,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:43:16,783 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2019-10-15 01:43:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:16,793 INFO L225 Difference]: With dead ends: 2226 [2019-10-15 01:43:16,793 INFO L226 Difference]: Without dead ends: 1532 [2019-10-15 01:43:16,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 252 SyntacticMatches, 86 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=430, Invalid=1826, Unknown=0, NotChecked=0, Total=2256 [2019-10-15 01:43:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2019-10-15 01:43:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1524. [2019-10-15 01:43:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2019-10-15 01:43:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2247 transitions. [2019-10-15 01:43:16,848 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2247 transitions. Word has length 116 [2019-10-15 01:43:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:16,848 INFO L462 AbstractCegarLoop]: Abstraction has 1524 states and 2247 transitions. [2019-10-15 01:43:16,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:43:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2247 transitions. [2019-10-15 01:43:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 01:43:16,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:16,854 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:43:17,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:17,059 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:17,060 INFO L82 PathProgramCache]: Analyzing trace with hash 5343218, now seen corresponding path program 1 times [2019-10-15 01:43:17,061 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:17,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975714794] [2019-10-15 01:43:17,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:17,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:17,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:17,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975714794] [2019-10-15 01:43:17,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845102014] [2019-10-15 01:43:17,245 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 01:43:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:17,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:17,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:17,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:17,471 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:43:17,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-15 01:43:17,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590114811] [2019-10-15 01:43:17,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:17,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:17,473 INFO L87 Difference]: Start difference. First operand 1524 states and 2247 transitions. Second operand 3 states.