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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:33,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:33,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:33,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:33,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:33,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:33,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:33,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:33,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:33,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:33,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:33,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:33,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:33,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:33,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:33,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:33,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:33,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:33,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:33,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:33,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:33,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:33,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:33,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:33,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:58:33,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:58:33,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:58:33,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:58:33,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:58:33,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:58:33,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:33,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:33,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:33,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:33,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:33,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:33,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:33,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:33,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:33,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:33,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:33,225 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 [2019-10-14 23:58:33,252 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:33,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:33,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:33,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:33,254 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:33,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:33,255 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:33,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:33,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:33,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:33,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:33,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:33,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:33,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:33,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:33,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:33,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:33,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:33,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:33,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:33,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:33,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:33,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:33,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:33,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:33,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:33,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:33,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:33,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:58:33,509 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:33,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:33,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:33,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:33,534 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:33,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-10-14 23:58:33,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a41cf44e/44720a2852954e56b1f4f02f78cac56f/FLAG215d7652b [2019-10-14 23:58:34,257 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:34,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2019-10-14 23:58:34,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a41cf44e/44720a2852954e56b1f4f02f78cac56f/FLAG215d7652b [2019-10-14 23:58:34,398 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a41cf44e/44720a2852954e56b1f4f02f78cac56f [2019-10-14 23:58:34,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:34,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:34,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:34,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:34,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:34,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:34" (1/1) ... [2019-10-14 23:58:34,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39aa9343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34, skipping insertion in model container [2019-10-14 23:58:34,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:34" (1/1) ... [2019-10-14 23:58:34,426 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:34,509 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:35,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:35,367 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:35,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:35,582 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:35,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35 WrapperNode [2019-10-14 23:58:35,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:35,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:35,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:35,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:35,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (1/1) ... [2019-10-14 23:58:35,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:35,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:35,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:35,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:35,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (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 [2019-10-14 23:58:35,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:35,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:35,834 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:35,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:35,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:35,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:35,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:37,755 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:37,755 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:37,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:37 BoogieIcfgContainer [2019-10-14 23:58:37,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:37,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:37,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:37,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:37,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:34" (1/3) ... [2019-10-14 23:58:37,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6627979f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:37, skipping insertion in model container [2019-10-14 23:58:37,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:35" (2/3) ... [2019-10-14 23:58:37,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6627979f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:37, skipping insertion in model container [2019-10-14 23:58:37,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:37" (3/3) ... [2019-10-14 23:58:37,765 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2019-10-14 23:58:37,775 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:37,783 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:37,794 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:37,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:37,833 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:37,833 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:37,834 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:37,834 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:37,834 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:37,834 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:37,834 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-14 23:58:37,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:37,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:37,897 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:37,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1303003168, now seen corresponding path program 1 times [2019-10-14 23:58:37,914 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:37,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456487837] [2019-10-14 23:58:37,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:37,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:37,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:38,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456487837] [2019-10-14 23:58:38,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:38,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:38,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495684374] [2019-10-14 23:58:38,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:38,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:38,653 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:58:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:39,966 INFO L93 Difference]: Finished difference Result 852 states and 1505 transitions. [2019-10-14 23:58:39,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:39,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2019-10-14 23:58:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:39,990 INFO L225 Difference]: With dead ends: 852 [2019-10-14 23:58:39,990 INFO L226 Difference]: Without dead ends: 479 [2019-10-14 23:58:39,999 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 [2019-10-14 23:58:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2019-10-14 23:58:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2019-10-14 23:58:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-10-14 23:58:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 749 transitions. [2019-10-14 23:58:40,077 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 749 transitions. Word has length 159 [2019-10-14 23:58:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:40,079 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 749 transitions. [2019-10-14 23:58:40,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 749 transitions. [2019-10-14 23:58:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 23:58:40,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:40,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:40,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash 436458787, now seen corresponding path program 1 times [2019-10-14 23:58:40,086 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:40,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895371754] [2019-10-14 23:58:40,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:40,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:40,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:40,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895371754] [2019-10-14 23:58:40,288 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:40,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:40,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035716832] [2019-10-14 23:58:40,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:40,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:40,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:40,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:40,292 INFO L87 Difference]: Start difference. First operand 465 states and 749 transitions. Second operand 6 states. [2019-10-14 23:58:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:41,855 INFO L93 Difference]: Finished difference Result 1400 states and 2330 transitions. [2019-10-14 23:58:41,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:58:41,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2019-10-14 23:58:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:41,866 INFO L225 Difference]: With dead ends: 1400 [2019-10-14 23:58:41,866 INFO L226 Difference]: Without dead ends: 941 [2019-10-14 23:58:41,869 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2019-10-14 23:58:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 900. [2019-10-14 23:58:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2019-10-14 23:58:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1440 transitions. [2019-10-14 23:58:41,963 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1440 transitions. Word has length 168 [2019-10-14 23:58:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:41,963 INFO L462 AbstractCegarLoop]: Abstraction has 900 states and 1440 transitions. [2019-10-14 23:58:41,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1440 transitions. [2019-10-14 23:58:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-14 23:58:41,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:41,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:41,969 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1302221225, now seen corresponding path program 1 times [2019-10-14 23:58:41,970 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:41,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290794179] [2019-10-14 23:58:41,971 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:41,971 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:41,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:42,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290794179] [2019-10-14 23:58:42,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:42,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:58:42,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275656476] [2019-10-14 23:58:42,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:58:42,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:58:42,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:58:42,083 INFO L87 Difference]: Start difference. First operand 900 states and 1440 transitions. Second operand 5 states. [2019-10-14 23:58:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:43,565 INFO L93 Difference]: Finished difference Result 2690 states and 4475 transitions. [2019-10-14 23:58:43,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:43,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2019-10-14 23:58:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:43,579 INFO L225 Difference]: With dead ends: 2690 [2019-10-14 23:58:43,579 INFO L226 Difference]: Without dead ends: 1796 [2019-10-14 23:58:43,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2019-10-14 23:58:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1763. [2019-10-14 23:58:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2019-10-14 23:58:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2724 transitions. [2019-10-14 23:58:43,718 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2724 transitions. Word has length 169 [2019-10-14 23:58:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:43,718 INFO L462 AbstractCegarLoop]: Abstraction has 1763 states and 2724 transitions. [2019-10-14 23:58:43,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:58:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2724 transitions. [2019-10-14 23:58:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:58:43,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:43,727 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:43,727 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1015492916, now seen corresponding path program 1 times [2019-10-14 23:58:43,728 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:43,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289828421] [2019-10-14 23:58:43,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:43,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:43,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:44,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289828421] [2019-10-14 23:58:44,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:44,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:44,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374772859] [2019-10-14 23:58:44,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:44,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:44,029 INFO L87 Difference]: Start difference. First operand 1763 states and 2724 transitions. Second operand 3 states. [2019-10-14 23:58:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:45,074 INFO L93 Difference]: Finished difference Result 5006 states and 7972 transitions. [2019-10-14 23:58:45,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:45,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-14 23:58:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:45,095 INFO L225 Difference]: With dead ends: 5006 [2019-10-14 23:58:45,095 INFO L226 Difference]: Without dead ends: 3249 [2019-10-14 23:58:45,101 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 [2019-10-14 23:58:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2019-10-14 23:58:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 3246. [2019-10-14 23:58:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2019-10-14 23:58:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4935 transitions. [2019-10-14 23:58:45,253 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4935 transitions. Word has length 171 [2019-10-14 23:58:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:45,254 INFO L462 AbstractCegarLoop]: Abstraction has 3246 states and 4935 transitions. [2019-10-14 23:58:45,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4935 transitions. [2019-10-14 23:58:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 23:58:45,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:45,264 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:45,264 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:45,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1082780184, now seen corresponding path program 1 times [2019-10-14 23:58:45,265 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:45,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628210331] [2019-10-14 23:58:45,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:45,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:45,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:45,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628210331] [2019-10-14 23:58:45,459 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:45,459 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:45,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57283312] [2019-10-14 23:58:45,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:45,460 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:45,461 INFO L87 Difference]: Start difference. First operand 3246 states and 4935 transitions. Second operand 3 states. [2019-10-14 23:58:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:46,503 INFO L93 Difference]: Finished difference Result 9442 states and 14806 transitions. [2019-10-14 23:58:46,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:46,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-14 23:58:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:46,547 INFO L225 Difference]: With dead ends: 9442 [2019-10-14 23:58:46,547 INFO L226 Difference]: Without dead ends: 6202 [2019-10-14 23:58:46,558 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 [2019-10-14 23:58:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6202 states. [2019-10-14 23:58:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6202 to 6194. [2019-10-14 23:58:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6194 states. [2019-10-14 23:58:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 9368 transitions. [2019-10-14 23:58:46,832 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 9368 transitions. Word has length 173 [2019-10-14 23:58:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:46,833 INFO L462 AbstractCegarLoop]: Abstraction has 6194 states and 9368 transitions. [2019-10-14 23:58:46,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 9368 transitions. [2019-10-14 23:58:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-14 23:58:46,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:46,851 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:46,851 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:46,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1343685801, now seen corresponding path program 1 times [2019-10-14 23:58:46,852 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:46,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845843816] [2019-10-14 23:58:46,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:46,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:46,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:46,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845843816] [2019-10-14 23:58:46,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:46,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:46,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960693348] [2019-10-14 23:58:46,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:46,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:46,959 INFO L87 Difference]: Start difference. First operand 6194 states and 9368 transitions. Second operand 6 states. [2019-10-14 23:58:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:48,362 INFO L93 Difference]: Finished difference Result 12565 states and 20117 transitions. [2019-10-14 23:58:48,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:48,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2019-10-14 23:58:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:48,398 INFO L225 Difference]: With dead ends: 12565 [2019-10-14 23:58:48,399 INFO L226 Difference]: Without dead ends: 6377 [2019-10-14 23:58:48,418 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 [2019-10-14 23:58:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6377 states. [2019-10-14 23:58:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6377 to 6306. [2019-10-14 23:58:48,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6306 states. [2019-10-14 23:58:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 9051 transitions. [2019-10-14 23:58:48,680 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 9051 transitions. Word has length 178 [2019-10-14 23:58:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:48,680 INFO L462 AbstractCegarLoop]: Abstraction has 6306 states and 9051 transitions. [2019-10-14 23:58:48,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 9051 transitions. [2019-10-14 23:58:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-14 23:58:48,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:48,706 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:48,706 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash -993562373, now seen corresponding path program 1 times [2019-10-14 23:58:48,707 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:48,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838782868] [2019-10-14 23:58:48,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:48,707 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:48,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:48,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838782868] [2019-10-14 23:58:48,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147304265] [2019-10-14 23:58:48,844 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 [2019-10-14 23:58:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:49,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:58:49,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:58:49,144 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:58:49,228 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:49,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-14 23:58:49,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907619165] [2019-10-14 23:58:49,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:58:49,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:58:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:49,231 INFO L87 Difference]: Start difference. First operand 6306 states and 9051 transitions. Second operand 4 states. [2019-10-14 23:58:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:49,944 INFO L93 Difference]: Finished difference Result 12603 states and 18094 transitions. [2019-10-14 23:58:49,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:49,958 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 181 [2019-10-14 23:58:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:49,988 INFO L225 Difference]: With dead ends: 12603 [2019-10-14 23:58:49,988 INFO L226 Difference]: Without dead ends: 6303 [2019-10-14 23:58:50,003 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2019-10-14 23:58:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 6303. [2019-10-14 23:58:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6303 states. [2019-10-14 23:58:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9042 transitions. [2019-10-14 23:58:50,272 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9042 transitions. Word has length 181 [2019-10-14 23:58:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:50,273 INFO L462 AbstractCegarLoop]: Abstraction has 6303 states and 9042 transitions. [2019-10-14 23:58:50,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:58:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9042 transitions. [2019-10-14 23:58:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 23:58:50,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:50,295 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:50,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:50,502 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:50,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:50,503 INFO L82 PathProgramCache]: Analyzing trace with hash 601297791, now seen corresponding path program 1 times [2019-10-14 23:58:50,503 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:50,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624398895] [2019-10-14 23:58:50,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:50,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:50,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:50,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624398895] [2019-10-14 23:58:50,633 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:50,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:50,633 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919419345] [2019-10-14 23:58:50,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:50,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:50,635 INFO L87 Difference]: Start difference. First operand 6303 states and 9042 transitions. Second operand 6 states. [2019-10-14 23:58:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:52,088 INFO L93 Difference]: Finished difference Result 18215 states and 27311 transitions. [2019-10-14 23:58:52,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:52,088 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-10-14 23:58:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:52,130 INFO L225 Difference]: With dead ends: 18215 [2019-10-14 23:58:52,131 INFO L226 Difference]: Without dead ends: 11918 [2019-10-14 23:58:52,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11918 states. [2019-10-14 23:58:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11918 to 11841. [2019-10-14 23:58:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11841 states. [2019-10-14 23:58:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11841 states to 11841 states and 15939 transitions. [2019-10-14 23:58:52,546 INFO L78 Accepts]: Start accepts. Automaton has 11841 states and 15939 transitions. Word has length 182 [2019-10-14 23:58:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:52,546 INFO L462 AbstractCegarLoop]: Abstraction has 11841 states and 15939 transitions. [2019-10-14 23:58:52,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11841 states and 15939 transitions. [2019-10-14 23:58:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-14 23:58:52,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:52,575 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 23:58:52,575 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash -38037913, now seen corresponding path program 1 times [2019-10-14 23:58:52,576 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:52,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531792149] [2019-10-14 23:58:52,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:52,577 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:52,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:52,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531792149] [2019-10-14 23:58:52,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665064274] [2019-10-14 23:58:52,736 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 [2019-10-14 23:58:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:52,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:52,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:53,050 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:53,133 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:53,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-14 23:58:53,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968451651] [2019-10-14 23:58:53,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:58:53,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:53,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:58:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:53,140 INFO L87 Difference]: Start difference. First operand 11841 states and 15939 transitions. Second operand 4 states. [2019-10-14 23:58:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:54,697 INFO L93 Difference]: Finished difference Result 28705 states and 38094 transitions. [2019-10-14 23:58:54,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:58:54,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 211 [2019-10-14 23:58:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:54,753 INFO L225 Difference]: With dead ends: 28705 [2019-10-14 23:58:54,753 INFO L226 Difference]: Without dead ends: 16870 [2019-10-14 23:58:54,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:58:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2019-10-14 23:58:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 16867. [2019-10-14 23:58:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16867 states. [2019-10-14 23:58:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 21495 transitions. [2019-10-14 23:58:55,228 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 21495 transitions. Word has length 211 [2019-10-14 23:58:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:55,229 INFO L462 AbstractCegarLoop]: Abstraction has 16867 states and 21495 transitions. [2019-10-14 23:58:55,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:58:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 21495 transitions. [2019-10-14 23:58:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-14 23:58:55,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:55,268 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-14 23:58:55,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:55,475 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:55,475 INFO L82 PathProgramCache]: Analyzing trace with hash 739387165, now seen corresponding path program 1 times [2019-10-14 23:58:55,475 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:55,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425165332] [2019-10-14 23:58:55,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:55,476 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:55,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:58:55,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425165332] [2019-10-14 23:58:55,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476066990] [2019-10-14 23:58:55,648 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 [2019-10-14 23:58:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:55,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:55,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:55,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:56,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1093764141] [2019-10-14 23:58:56,170 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-10-14 23:58:56,228 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:56,229 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)