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/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:28:11,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:28:11,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:28:11,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:28:11,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:28:11,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:28:11,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:28:11,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:28:11,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:28:11,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:28:11,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:28:11,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:28:11,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:28:11,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:28:11,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:28:11,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:28:11,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:28:11,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:28:11,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:28:11,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:28:11,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:28:11,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:28:11,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:28:11,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:28:11,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:28:11,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:28:11,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:28:11,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:28:11,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:28:11,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:28:11,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:28:11,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:28:11,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:28:11,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:28:11,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:28:11,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:28:11,227 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 01:28:11,260 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:28:11,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:28:11,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:28:11,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:28:11,264 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:28:11,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:28:11,265 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:28:11,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:28:11,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:28:11,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:28:11,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:28:11,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:28:11,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:28:11,268 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:28:11,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:28:11,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:28:11,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:28:11,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:28:11,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:28:11,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:28:11,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:28:11,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:28:11,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:28:11,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:28:11,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:28:11,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:28:11,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:28:11,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:28:11,272 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 [2019-10-15 01:28:11,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:28:11,607 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:28:11,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:28:11,613 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:28:11,613 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:28:11,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2019-10-15 01:28:11,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4002375/73d6c2a8935a4206bf2f3d288f949e15/FLAG00ba2eac6 [2019-10-15 01:28:12,202 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:28:12,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2019-10-15 01:28:12,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4002375/73d6c2a8935a4206bf2f3d288f949e15/FLAG00ba2eac6 [2019-10-15 01:28:12,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4002375/73d6c2a8935a4206bf2f3d288f949e15 [2019-10-15 01:28:12,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:28:12,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:28:12,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:28:12,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:28:12,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:28:12,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@433c8d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12, skipping insertion in model container [2019-10-15 01:28:12,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,549 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:28:12,577 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:28:12,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:28:12,807 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:28:12,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:28:12,860 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:28:12,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12 WrapperNode [2019-10-15 01:28:12,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:28:12,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:28:12,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:28:12,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:28:12,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:13,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:13,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:28:13,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:28:13,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:28:13,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:28:13,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (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 01:28:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:28:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:28:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 01:28:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2019-10-15 01:28:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2019-10-15 01:28:13,060 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2019-10-15 01:28:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2019-10-15 01:28:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2019-10-15 01:28:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 01:28:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 01:28:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 01:28:13,061 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 01:28:13,062 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 01:28:13,062 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 01:28:13,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:28:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:28:13,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2019-10-15 01:28:13,063 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 01:28:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 01:28:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 01:28:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 01:28:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 01:28:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 01:28:13,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:28:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:28:13,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:28:13,486 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:28:13,487 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:28:13,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:28:13 BoogieIcfgContainer [2019-10-15 01:28:13,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:28:13,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:28:13,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:28:13,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:28:13,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:28:12" (1/3) ... [2019-10-15 01:28:13,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1067bdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:28:13, skipping insertion in model container [2019-10-15 01:28:13,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12" (2/3) ... [2019-10-15 01:28:13,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1067bdc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:28:13, skipping insertion in model container [2019-10-15 01:28:13,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:28:13" (3/3) ... [2019-10-15 01:28:13,497 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2019-10-15 01:28:13,509 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:28:13,517 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:28:13,529 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:28:13,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:28:13,558 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:28:13,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:28:13,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:28:13,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:28:13,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:28:13,559 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:28:13,559 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:28:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2019-10-15 01:28:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 01:28:13,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:13,596 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] [2019-10-15 01:28:13,598 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2019-10-15 01:28:13,611 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:13,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143210087] [2019-10-15 01:28:13,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:13,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:13,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:13,922 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 01:28:13,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143210087] [2019-10-15 01:28:13,924 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:13,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:28:13,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903803398] [2019-10-15 01:28:13,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:28:13,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:28:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:28:13,955 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 3 states. [2019-10-15 01:28:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:14,148 INFO L93 Difference]: Finished difference Result 279 states and 395 transitions. [2019-10-15 01:28:14,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:28:14,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-10-15 01:28:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:14,165 INFO L225 Difference]: With dead ends: 279 [2019-10-15 01:28:14,166 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:28:14,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:28:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:28:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2019-10-15 01:28:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-10-15 01:28:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2019-10-15 01:28:14,241 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 65 [2019-10-15 01:28:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:14,243 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2019-10-15 01:28:14,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:28:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2019-10-15 01:28:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:28:14,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:14,255 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] [2019-10-15 01:28:14,255 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2019-10-15 01:28:14,256 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:14,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525288111] [2019-10-15 01:28:14,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:14,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:14,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:14,502 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 01:28:14,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525288111] [2019-10-15 01:28:14,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:14,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:28:14,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413533270] [2019-10-15 01:28:14,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:14,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:14,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:14,508 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand 4 states. [2019-10-15 01:28:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:14,833 INFO L93 Difference]: Finished difference Result 469 states and 653 transitions. [2019-10-15 01:28:14,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:14,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-15 01:28:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:14,839 INFO L225 Difference]: With dead ends: 469 [2019-10-15 01:28:14,840 INFO L226 Difference]: Without dead ends: 318 [2019-10-15 01:28:14,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:14,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-10-15 01:28:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2019-10-15 01:28:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-10-15 01:28:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 411 transitions. [2019-10-15 01:28:14,911 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 411 transitions. Word has length 66 [2019-10-15 01:28:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:14,911 INFO L462 AbstractCegarLoop]: Abstraction has 314 states and 411 transitions. [2019-10-15 01:28:14,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 411 transitions. [2019-10-15 01:28:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:28:14,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:14,917 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] [2019-10-15 01:28:14,917 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1424590262, now seen corresponding path program 1 times [2019-10-15 01:28:14,918 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:14,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596423933] [2019-10-15 01:28:14,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:14,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:14,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:14,990 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 01:28:14,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596423933] [2019-10-15 01:28:14,991 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:14,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:28:14,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595207761] [2019-10-15 01:28:14,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:14,993 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:14,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:14,994 INFO L87 Difference]: Start difference. First operand 314 states and 411 transitions. Second operand 4 states. [2019-10-15 01:28:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:15,105 INFO L93 Difference]: Finished difference Result 565 states and 734 transitions. [2019-10-15 01:28:15,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:15,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-15 01:28:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:15,110 INFO L225 Difference]: With dead ends: 565 [2019-10-15 01:28:15,110 INFO L226 Difference]: Without dead ends: 268 [2019-10-15 01:28:15,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-10-15 01:28:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2019-10-15 01:28:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-10-15 01:28:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 341 transitions. [2019-10-15 01:28:15,150 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 341 transitions. Word has length 66 [2019-10-15 01:28:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:15,151 INFO L462 AbstractCegarLoop]: Abstraction has 268 states and 341 transitions. [2019-10-15 01:28:15,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 341 transitions. [2019-10-15 01:28:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:28:15,154 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:15,154 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] [2019-10-15 01:28:15,154 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:15,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:15,155 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2019-10-15 01:28:15,155 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:15,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729719384] [2019-10-15 01:28:15,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:15,156 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:15,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:15,264 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 01:28:15,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729719384] [2019-10-15 01:28:15,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:15,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:15,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225056795] [2019-10-15 01:28:15,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:15,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:15,269 INFO L87 Difference]: Start difference. First operand 268 states and 341 transitions. Second operand 6 states. [2019-10-15 01:28:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:15,327 INFO L93 Difference]: Finished difference Result 529 states and 694 transitions. [2019-10-15 01:28:15,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:28:15,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2019-10-15 01:28:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:15,331 INFO L225 Difference]: With dead ends: 529 [2019-10-15 01:28:15,332 INFO L226 Difference]: Without dead ends: 278 [2019-10-15 01:28:15,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:28:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-15 01:28:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-15 01:28:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-15 01:28:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 349 transitions. [2019-10-15 01:28:15,365 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 349 transitions. Word has length 66 [2019-10-15 01:28:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:15,367 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 349 transitions. [2019-10-15 01:28:15,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 349 transitions. [2019-10-15 01:28:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:28:15,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:15,373 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] [2019-10-15 01:28:15,373 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2019-10-15 01:28:15,374 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:15,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36074604] [2019-10-15 01:28:15,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:15,375 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:15,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:15,500 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 01:28:15,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36074604] [2019-10-15 01:28:15,501 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:15,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:15,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870844033] [2019-10-15 01:28:15,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:15,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:15,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:15,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:15,504 INFO L87 Difference]: Start difference. First operand 278 states and 349 transitions. Second operand 6 states. [2019-10-15 01:28:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:16,066 INFO L93 Difference]: Finished difference Result 850 states and 1130 transitions. [2019-10-15 01:28:16,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:28:16,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2019-10-15 01:28:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:16,072 INFO L225 Difference]: With dead ends: 850 [2019-10-15 01:28:16,073 INFO L226 Difference]: Without dead ends: 589 [2019-10-15 01:28:16,075 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:28:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2019-10-15 01:28:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 577. [2019-10-15 01:28:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-15 01:28:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 713 transitions. [2019-10-15 01:28:16,126 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 713 transitions. Word has length 66 [2019-10-15 01:28:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:16,127 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 713 transitions. [2019-10-15 01:28:16,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 713 transitions. [2019-10-15 01:28:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:28:16,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:16,130 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] [2019-10-15 01:28:16,130 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:16,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2019-10-15 01:28:16,131 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:16,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164798655] [2019-10-15 01:28:16,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:16,201 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 01:28:16,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164798655] [2019-10-15 01:28:16,202 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:16,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:16,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338933654] [2019-10-15 01:28:16,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:16,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:16,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:16,215 INFO L87 Difference]: Start difference. First operand 577 states and 713 transitions. Second operand 6 states. [2019-10-15 01:28:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:16,291 INFO L93 Difference]: Finished difference Result 1140 states and 1459 transitions. [2019-10-15 01:28:16,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:28:16,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2019-10-15 01:28:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:16,298 INFO L225 Difference]: With dead ends: 1140 [2019-10-15 01:28:16,298 INFO L226 Difference]: Without dead ends: 616 [2019-10-15 01:28:16,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:28:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-15 01:28:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 604. [2019-10-15 01:28:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-10-15 01:28:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 735 transitions. [2019-10-15 01:28:16,347 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 735 transitions. Word has length 66 [2019-10-15 01:28:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:16,348 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 735 transitions. [2019-10-15 01:28:16,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 735 transitions. [2019-10-15 01:28:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:28:16,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:16,351 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] [2019-10-15 01:28:16,351 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2019-10-15 01:28:16,352 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:16,352 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930316711] [2019-10-15 01:28:16,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:16,443 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 01:28:16,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930316711] [2019-10-15 01:28:16,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:16,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:28:16,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995245460] [2019-10-15 01:28:16,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:16,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:16,447 INFO L87 Difference]: Start difference. First operand 604 states and 735 transitions. Second operand 4 states. [2019-10-15 01:28:16,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:16,620 INFO L93 Difference]: Finished difference Result 842 states and 1059 transitions. [2019-10-15 01:28:16,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:16,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-15 01:28:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:16,640 INFO L225 Difference]: With dead ends: 842 [2019-10-15 01:28:16,640 INFO L226 Difference]: Without dead ends: 839 [2019-10-15 01:28:16,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:28:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-10-15 01:28:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 675. [2019-10-15 01:28:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2019-10-15 01:28:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 829 transitions. [2019-10-15 01:28:16,698 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 829 transitions. Word has length 66 [2019-10-15 01:28:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:16,699 INFO L462 AbstractCegarLoop]: Abstraction has 675 states and 829 transitions. [2019-10-15 01:28:16,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 829 transitions. [2019-10-15 01:28:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:28:16,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:16,701 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] [2019-10-15 01:28:16,702 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:16,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1170545691, now seen corresponding path program 1 times [2019-10-15 01:28:16,702 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:16,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209363343] [2019-10-15 01:28:16,703 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,703 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:16,805 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 01:28:16,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209363343] [2019-10-15 01:28:16,806 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:16,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:28:16,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200815605] [2019-10-15 01:28:16,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:28:16,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:16,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:28:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:28:16,808 INFO L87 Difference]: Start difference. First operand 675 states and 829 transitions. Second operand 3 states. [2019-10-15 01:28:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:16,873 INFO L93 Difference]: Finished difference Result 1249 states and 1576 transitions. [2019-10-15 01:28:16,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:28:16,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-10-15 01:28:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:16,880 INFO L225 Difference]: With dead ends: 1249 [2019-10-15 01:28:16,881 INFO L226 Difference]: Without dead ends: 655 [2019-10-15 01:28:16,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:28:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2019-10-15 01:28:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 567. [2019-10-15 01:28:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2019-10-15 01:28:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 677 transitions. [2019-10-15 01:28:16,935 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 677 transitions. Word has length 67 [2019-10-15 01:28:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:16,936 INFO L462 AbstractCegarLoop]: Abstraction has 567 states and 677 transitions. [2019-10-15 01:28:16,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:28:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 677 transitions. [2019-10-15 01:28:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:28:16,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:16,940 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] [2019-10-15 01:28:16,940 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1338277302, now seen corresponding path program 1 times [2019-10-15 01:28:16,941 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:16,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798759513] [2019-10-15 01:28:16,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:28:17,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798759513] [2019-10-15 01:28:17,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533136292] [2019-10-15 01:28:17,018 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 01:28:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:17,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:28:17,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:28:17,196 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:28:17,257 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:28:17,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-15 01:28:17,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72478873] [2019-10-15 01:28:17,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:17,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:28:17,259 INFO L87 Difference]: Start difference. First operand 567 states and 677 transitions. Second operand 4 states. [2019-10-15 01:28:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:17,373 INFO L93 Difference]: Finished difference Result 1383 states and 1712 transitions. [2019-10-15 01:28:17,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:17,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-15 01:28:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:17,379 INFO L225 Difference]: With dead ends: 1383 [2019-10-15 01:28:17,380 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:28:17,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:28:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:28:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 660. [2019-10-15 01:28:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2019-10-15 01:28:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 805 transitions. [2019-10-15 01:28:17,439 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 805 transitions. Word has length 87 [2019-10-15 01:28:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:17,440 INFO L462 AbstractCegarLoop]: Abstraction has 660 states and 805 transitions. [2019-10-15 01:28:17,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 805 transitions. [2019-10-15 01:28:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 01:28:17,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:17,443 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] [2019-10-15 01:28:17,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:17,650 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2019-10-15 01:28:17,651 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:17,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734372130] [2019-10-15 01:28:17,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:17,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:17,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:28:17,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734372130] [2019-10-15 01:28:17,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846503341] [2019-10-15 01:28:17,784 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 01:28:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:17,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-15 01:28:17,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:28:18,047 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:18,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 01:28:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:28:18,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [267022929] [2019-10-15 01:28:18,250 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 100 [2019-10-15 01:28:18,298 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:28:18,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:28:18,515 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:28:18,518 INFO L272 AbstractInterpreter]: Visited 79 different actions 103 times. Merged at 2 different actions 2 times. Never widened. Performed 372 root evaluator evaluations with a maximum evaluation depth of 4. Performed 372 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 36 variables. [2019-10-15 01:28:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:18,525 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:28:18,795 INFO L227 lantSequenceWeakener]: Weakened 95 states. On average, predicates are now at 79.53% of their original sizes. [2019-10-15 01:28:18,795 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:28:19,699 INFO L553 sIntCurrentIteration]: We unified 98 AI predicates to 98 [2019-10-15 01:28:19,699 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:28:19,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:28:19,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [6, 8, 6] total 53 [2019-10-15 01:28:19,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110658920] [2019-10-15 01:28:19,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 01:28:19,701 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:19,702 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:28:19,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 01:28:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:28:19,703 INFO L87 Difference]: Start difference. First operand 660 states and 805 transitions. Second operand 41 states. [2019-10-15 01:28:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:28,270 INFO L93 Difference]: Finished difference Result 1460 states and 1852 transitions. [2019-10-15 01:28:28,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-15 01:28:28,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 99 [2019-10-15 01:28:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:28,277 INFO L225 Difference]: With dead ends: 1460 [2019-10-15 01:28:28,278 INFO L226 Difference]: Without dead ends: 817 [2019-10-15 01:28:28,283 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=415, Invalid=4141, Unknown=0, NotChecked=0, Total=4556 [2019-10-15 01:28:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2019-10-15 01:28:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 781. [2019-10-15 01:28:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2019-10-15 01:28:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 964 transitions. [2019-10-15 01:28:28,346 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 964 transitions. Word has length 99 [2019-10-15 01:28:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:28,347 INFO L462 AbstractCegarLoop]: Abstraction has 781 states and 964 transitions. [2019-10-15 01:28:28,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 01:28:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 964 transitions. [2019-10-15 01:28:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:28:28,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:28,352 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:28,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:28,562 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1499335660, now seen corresponding path program 1 times [2019-10-15 01:28:28,563 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:28,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485873895] [2019-10-15 01:28:28,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:28,564 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:28,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 01:28:28,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485873895] [2019-10-15 01:28:28,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751909202] [2019-10-15 01:28:28,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:28,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:28:28,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:28:28,997 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-15 01:28:29,136 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:28:29,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [16] total 18 [2019-10-15 01:28:29,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326328839] [2019-10-15 01:28:29,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:29,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:28:29,138 INFO L87 Difference]: Start difference. First operand 781 states and 964 transitions. Second operand 4 states. [2019-10-15 01:28:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:29,230 INFO L93 Difference]: Finished difference Result 1073 states and 1373 transitions. [2019-10-15 01:28:29,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:29,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-15 01:28:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:29,235 INFO L225 Difference]: With dead ends: 1073 [2019-10-15 01:28:29,236 INFO L226 Difference]: Without dead ends: 769 [2019-10-15 01:28:29,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:28:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2019-10-15 01:28:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2019-10-15 01:28:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2019-10-15 01:28:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 946 transitions. [2019-10-15 01:28:29,292 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 946 transitions. Word has length 149 [2019-10-15 01:28:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:29,292 INFO L462 AbstractCegarLoop]: Abstraction has 769 states and 946 transitions. [2019-10-15 01:28:29,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 946 transitions. [2019-10-15 01:28:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 01:28:29,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:29,297 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, 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] [2019-10-15 01:28:29,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:29,511 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1156102443, now seen corresponding path program 1 times [2019-10-15 01:28:29,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:29,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992964690] [2019-10-15 01:28:29,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:29,513 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:29,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:28:29,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992964690] [2019-10-15 01:28:29,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697655852] [2019-10-15 01:28:29,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:29,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-15 01:28:29,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:28:30,001 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:30,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 01:28:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 01:28:30,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1139273735] [2019-10-15 01:28:30,204 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 121 [2019-10-15 01:28:30,212 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:28:30,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:28:30,371 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:28:30,372 INFO L272 AbstractInterpreter]: Visited 90 different actions 390 times. Merged at 28 different actions 73 times. Never widened. Performed 1689 root evaluator evaluations with a maximum evaluation depth of 4. Performed 1689 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 3 different actions. Largest state had 36 variables. [2019-10-15 01:28:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:30,374 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:28:30,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:28:30,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 17 [2019-10-15 01:28:30,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625039870] [2019-10-15 01:28:30,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:28:30,377 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:28:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:28:30,379 INFO L87 Difference]: Start difference. First operand 769 states and 946 transitions. Second operand 17 states. [2019-10-15 01:28:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:33,969 INFO L93 Difference]: Finished difference Result 2624 states and 4682 transitions. [2019-10-15 01:28:33,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:28:33,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2019-10-15 01:28:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:33,999 INFO L225 Difference]: With dead ends: 2624 [2019-10-15 01:28:33,999 INFO L226 Difference]: Without dead ends: 2621 [2019-10-15 01:28:34,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 240 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:28:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2019-10-15 01:28:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2326. [2019-10-15 01:28:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2326 states. [2019-10-15 01:28:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3553 transitions. [2019-10-15 01:28:34,320 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3553 transitions. Word has length 120 [2019-10-15 01:28:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:34,320 INFO L462 AbstractCegarLoop]: Abstraction has 2326 states and 3553 transitions. [2019-10-15 01:28:34,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:28:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3553 transitions. [2019-10-15 01:28:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-15 01:28:34,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:34,328 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:28:34,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:34,534 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1820709873, now seen corresponding path program 1 times [2019-10-15 01:28:34,536 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:34,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263709091] [2019-10-15 01:28:34,536 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:34,536 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:34,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 01:28:34,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263709091] [2019-10-15 01:28:34,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142426429] [2019-10-15 01:28:34,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:34,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:28:34,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 01:28:34,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-15 01:28:35,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:28:35,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 12 [2019-10-15 01:28:35,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332969168] [2019-10-15 01:28:35,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:35,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:28:35,019 INFO L87 Difference]: Start difference. First operand 2326 states and 3553 transitions. Second operand 6 states. [2019-10-15 01:28:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:35,164 INFO L93 Difference]: Finished difference Result 4845 states and 7678 transitions. [2019-10-15 01:28:35,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:28:35,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-10-15 01:28:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:35,185 INFO L225 Difference]: With dead ends: 4845 [2019-10-15 01:28:35,185 INFO L226 Difference]: Without dead ends: 2616 [2019-10-15 01:28:35,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:28:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2019-10-15 01:28:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2042. [2019-10-15 01:28:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2042 states. [2019-10-15 01:28:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 2814 transitions. [2019-10-15 01:28:35,482 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 2814 transitions. Word has length 175 [2019-10-15 01:28:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:35,483 INFO L462 AbstractCegarLoop]: Abstraction has 2042 states and 2814 transitions. [2019-10-15 01:28:35,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 2814 transitions. [2019-10-15 01:28:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 01:28:35,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:35,488 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:28:35,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:35,694 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2019-10-15 01:28:35,695 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:35,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928745859] [2019-10-15 01:28:35,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:35,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:35,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 01:28:35,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928745859] [2019-10-15 01:28:35,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818403155] [2019-10-15 01:28:35,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:35,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:28:35,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 01:28:35,966 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 01:28:36,057 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:28:36,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 4] total 11 [2019-10-15 01:28:36,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901194365] [2019-10-15 01:28:36,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:28:36,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:28:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:28:36,058 INFO L87 Difference]: Start difference. First operand 2042 states and 2814 transitions. Second operand 3 states. [2019-10-15 01:28:36,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:36,115 INFO L93 Difference]: Finished difference Result 2718 states and 3748 transitions. [2019-10-15 01:28:36,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:28:36,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2019-10-15 01:28:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:36,121 INFO L225 Difference]: With dead ends: 2718 [2019-10-15 01:28:36,121 INFO L226 Difference]: Without dead ends: 746 [2019-10-15 01:28:36,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 283 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:28:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2019-10-15 01:28:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 717. [2019-10-15 01:28:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2019-10-15 01:28:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 822 transitions. [2019-10-15 01:28:36,180 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 822 transitions. Word has length 143 [2019-10-15 01:28:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:36,181 INFO L462 AbstractCegarLoop]: Abstraction has 717 states and 822 transitions. [2019-10-15 01:28:36,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:28:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 822 transitions. [2019-10-15 01:28:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-15 01:28:36,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:36,184 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:28:36,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:36,389 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1571306911, now seen corresponding path program 2 times [2019-10-15 01:28:36,390 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:36,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911369184] [2019-10-15 01:28:36,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:36,391 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:36,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-15 01:28:36,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911369184] [2019-10-15 01:28:36,444 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:36,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:28:36,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936281144] [2019-10-15 01:28:36,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:28:36,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:28:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:28:36,447 INFO L87 Difference]: Start difference. First operand 717 states and 822 transitions. Second operand 3 states. [2019-10-15 01:28:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:36,475 INFO L93 Difference]: Finished difference Result 881 states and 1019 transitions. [2019-10-15 01:28:36,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:28:36,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-10-15 01:28:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:36,480 INFO L225 Difference]: With dead ends: 881 [2019-10-15 01:28:36,480 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:28:36,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:28:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:28:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:28:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:28:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:28:36,486 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 146 [2019-10-15 01:28:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:36,486 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:28:36,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:28:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:28:36,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:28:36,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:28:38,809 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 1 [2019-10-15 01:28:39,069 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2019-10-15 01:28:39,170 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-10-15 01:28:39,443 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2019-10-15 01:28:39,726 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2019-10-15 01:28:39,833 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-10-15 01:28:39,939 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 1 [2019-10-15 01:28:40,344 WARN L191 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 81 [2019-10-15 01:28:41,252 WARN L191 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 104 [2019-10-15 01:28:42,000 WARN L191 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 91 [2019-10-15 01:28:42,434 WARN L191 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 88 [2019-10-15 01:28:42,837 WARN L191 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 74 [2019-10-15 01:28:43,134 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2019-10-15 01:28:43,241 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2019-10-15 01:28:44,345 WARN L191 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 123 [2019-10-15 01:28:44,583 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2019-10-15 01:28:45,090 WARN L191 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2019-10-15 01:28:45,583 WARN L191 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88