java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.04.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:59,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:59,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:59,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:59,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:59,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:59,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:59,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:59,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:59,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:59,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:59,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:59,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:59,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:59,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:59,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:59,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:59,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:59,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:59,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:59,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:59,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:59,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:59,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:59,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:31:59,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:31:59,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:31:59,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:31:59,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:31:59,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:31:59,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:59,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:59,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:59,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:59,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:59,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:59,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:59,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:59,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:59,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:59,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:59,530 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 03:31:59,561 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:59,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:59,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:59,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:59,567 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:59,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:59,567 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:59,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:59,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:59,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:59,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:59,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:59,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:59,572 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:59,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:59,572 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:59,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:59,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:59,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:59,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:59,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:59,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:59,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:59,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:59,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:59,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:59,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:59,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:59,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:31:59,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:59,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:59,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:59,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:59,935 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:59,936 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.04.cil-2.c [2019-10-15 03:32:00,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0ce180e/08a31f05a0ac44debefc7f371030c817/FLAGd5e4f0878 [2019-10-15 03:32:00,550 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:32:00,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.04.cil-2.c [2019-10-15 03:32:00,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0ce180e/08a31f05a0ac44debefc7f371030c817/FLAGd5e4f0878 [2019-10-15 03:32:00,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0ce180e/08a31f05a0ac44debefc7f371030c817 [2019-10-15 03:32:00,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:32:00,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:32:00,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:00,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:32:00,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:32:00,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703a7aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00, skipping insertion in model container [2019-10-15 03:32:00,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,973 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:32:01,025 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:32:01,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:01,417 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:32:01,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:01,499 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:32:01,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01 WrapperNode [2019-10-15 03:32:01,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:01,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:32:01,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:32:01,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:32:01,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (1/1) ... [2019-10-15 03:32:01,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:32:01,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:32:01,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:32:01,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:32:01,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (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 03:32:01,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:32:01,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:32:01,630 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:32:01,630 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:32:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:32:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:32:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-15 03:32:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-15 03:32:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:32:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:32:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:32:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-15 03:32:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-15 03:32:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:32:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:32:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:32:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:32:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:32:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:32:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:32:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:32:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:32:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:32:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:32:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:32:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:32:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:32:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:32:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:32:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:32:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:32:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:32:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-15 03:32:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-15 03:32:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:32:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:32:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:32:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:32:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:32:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:32:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:32:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:32:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:32:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:32:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:32:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:32:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:32:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:32:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:32:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:32:02,978 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:32:02,979 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-15 03:32:02,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:02 BoogieIcfgContainer [2019-10-15 03:32:02,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:32:02,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:32:02,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:32:02,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:32:02,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:32:00" (1/3) ... [2019-10-15 03:32:02,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5def8c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:02, skipping insertion in model container [2019-10-15 03:32:02,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:01" (2/3) ... [2019-10-15 03:32:02,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5def8c61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:02, skipping insertion in model container [2019-10-15 03:32:02,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:02" (3/3) ... [2019-10-15 03:32:02,996 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2019-10-15 03:32:03,006 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:32:03,015 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:32:03,026 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:32:03,054 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:32:03,054 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:32:03,054 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:32:03,054 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:32:03,056 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:32:03,057 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:32:03,057 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:32:03,057 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:32:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2019-10-15 03:32:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 03:32:03,096 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:03,097 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:03,099 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2119339724, now seen corresponding path program 1 times [2019-10-15 03:32:03,115 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143112450] [2019-10-15 03:32:03,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,116 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,589 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 03:32:03,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143112450] [2019-10-15 03:32:03,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:03,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:03,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923371123] [2019-10-15 03:32:03,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:03,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:03,616 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2019-10-15 03:32:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:04,104 INFO L93 Difference]: Finished difference Result 446 states and 623 transitions. [2019-10-15 03:32:04,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:04,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2019-10-15 03:32:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:04,140 INFO L225 Difference]: With dead ends: 446 [2019-10-15 03:32:04,140 INFO L226 Difference]: Without dead ends: 286 [2019-10-15 03:32:04,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 03:32:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-15 03:32:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2019-10-15 03:32:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-10-15 03:32:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 368 transitions. [2019-10-15 03:32:04,345 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 368 transitions. Word has length 78 [2019-10-15 03:32:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:04,346 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 368 transitions. [2019-10-15 03:32:04,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 368 transitions. [2019-10-15 03:32:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 03:32:04,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:04,363 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, 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] [2019-10-15 03:32:04,363 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527536, now seen corresponding path program 1 times [2019-10-15 03:32:04,366 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:04,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869017365] [2019-10-15 03:32:04,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:04,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:04,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 03:32:04,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869017365] [2019-10-15 03:32:04,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100886051] [2019-10-15 03:32:04,626 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 03:32:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:04,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 03:32:04,889 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 03:32:05,128 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:05,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 03:32:05,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785146225] [2019-10-15 03:32:05,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:05,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:05,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:05,145 INFO L87 Difference]: Start difference. First operand 285 states and 368 transitions. Second operand 4 states. [2019-10-15 03:32:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:05,262 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2019-10-15 03:32:05,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:05,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-15 03:32:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:05,272 INFO L225 Difference]: With dead ends: 504 [2019-10-15 03:32:05,272 INFO L226 Difference]: Without dead ends: 364 [2019-10-15 03:32:05,274 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 275 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-10-15 03:32:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 320. [2019-10-15 03:32:05,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-15 03:32:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 424 transitions. [2019-10-15 03:32:05,339 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 424 transitions. Word has length 138 [2019-10-15 03:32:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:05,340 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 424 transitions. [2019-10-15 03:32:05,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 424 transitions. [2019-10-15 03:32:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 03:32:05,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:05,344 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:05,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:05,549 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:05,549 INFO L82 PathProgramCache]: Analyzing trace with hash -104772843, now seen corresponding path program 1 times [2019-10-15 03:32:05,550 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:05,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041622379] [2019-10-15 03:32:05,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-15 03:32:05,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041622379] [2019-10-15 03:32:05,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653077069] [2019-10-15 03:32:05,731 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 03:32:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:32:05,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 03:32:06,003 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-15 03:32:06,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:06,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-15 03:32:06,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299188335] [2019-10-15 03:32:06,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:06,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:06,340 INFO L87 Difference]: Start difference. First operand 320 states and 424 transitions. Second operand 3 states. [2019-10-15 03:32:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:06,402 INFO L93 Difference]: Finished difference Result 918 states and 1258 transitions. [2019-10-15 03:32:06,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:06,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-10-15 03:32:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:06,412 INFO L225 Difference]: With dead ends: 918 [2019-10-15 03:32:06,412 INFO L226 Difference]: Without dead ends: 614 [2019-10-15 03:32:06,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 365 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-15 03:32:06,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2019-10-15 03:32:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 03:32:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 808 transitions. [2019-10-15 03:32:06,474 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 808 transitions. Word has length 186 [2019-10-15 03:32:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:06,475 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 808 transitions. [2019-10-15 03:32:06,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 808 transitions. [2019-10-15 03:32:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 03:32:06,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:06,485 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:06,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:06,693 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:06,693 INFO L82 PathProgramCache]: Analyzing trace with hash -272235167, now seen corresponding path program 1 times [2019-10-15 03:32:06,694 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:06,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158746526] [2019-10-15 03:32:06,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 03:32:06,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158746526] [2019-10-15 03:32:06,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265784496] [2019-10-15 03:32:06,898 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 03:32:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:07,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:07,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 03:32:07,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 03:32:07,392 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:07,392 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:07,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399123902] [2019-10-15 03:32:07,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:07,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:07,395 INFO L87 Difference]: Start difference. First operand 607 states and 808 transitions. Second operand 4 states. [2019-10-15 03:32:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:07,780 INFO L93 Difference]: Finished difference Result 1768 states and 2502 transitions. [2019-10-15 03:32:07,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:07,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-15 03:32:07,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:07,797 INFO L225 Difference]: With dead ends: 1768 [2019-10-15 03:32:07,797 INFO L226 Difference]: Without dead ends: 1177 [2019-10-15 03:32:07,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2019-10-15 03:32:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1163. [2019-10-15 03:32:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-10-15 03:32:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1537 transitions. [2019-10-15 03:32:07,896 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1537 transitions. Word has length 186 [2019-10-15 03:32:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:07,898 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1537 transitions. [2019-10-15 03:32:07,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:07,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1537 transitions. [2019-10-15 03:32:07,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 03:32:07,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:07,909 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:08,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:08,116 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1217605220, now seen corresponding path program 1 times [2019-10-15 03:32:08,118 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:08,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868570657] [2019-10-15 03:32:08,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:08,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:08,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-15 03:32:08,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868570657] [2019-10-15 03:32:08,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003301259] [2019-10-15 03:32:08,335 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 03:32:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:08,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:08,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 03:32:08,635 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-15 03:32:08,888 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:08,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:08,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627824544] [2019-10-15 03:32:08,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:08,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:08,892 INFO L87 Difference]: Start difference. First operand 1163 states and 1537 transitions. Second operand 4 states. [2019-10-15 03:32:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:09,286 INFO L93 Difference]: Finished difference Result 3416 states and 4809 transitions. [2019-10-15 03:32:09,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:09,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-15 03:32:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:09,307 INFO L225 Difference]: With dead ends: 3416 [2019-10-15 03:32:09,307 INFO L226 Difference]: Without dead ends: 2269 [2019-10-15 03:32:09,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2019-10-15 03:32:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2245. [2019-10-15 03:32:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2019-10-15 03:32:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2949 transitions. [2019-10-15 03:32:09,470 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2949 transitions. Word has length 186 [2019-10-15 03:32:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:09,471 INFO L462 AbstractCegarLoop]: Abstraction has 2245 states and 2949 transitions. [2019-10-15 03:32:09,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2949 transitions. [2019-10-15 03:32:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-15 03:32:09,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:09,480 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:09,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:09,686 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash -773567800, now seen corresponding path program 1 times [2019-10-15 03:32:09,687 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:09,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403863184] [2019-10-15 03:32:09,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:09,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:09,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-15 03:32:09,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403863184] [2019-10-15 03:32:09,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725237631] [2019-10-15 03:32:09,819 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 03:32:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:10,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:10,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 03:32:10,137 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 03:32:10,329 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:10,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:10,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349775515] [2019-10-15 03:32:10,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:10,331 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:10,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:10,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:10,332 INFO L87 Difference]: Start difference. First operand 2245 states and 2949 transitions. Second operand 4 states. [2019-10-15 03:32:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:10,782 INFO L93 Difference]: Finished difference Result 6622 states and 9315 transitions. [2019-10-15 03:32:10,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:10,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-15 03:32:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:10,815 INFO L225 Difference]: With dead ends: 6622 [2019-10-15 03:32:10,815 INFO L226 Difference]: Without dead ends: 4393 [2019-10-15 03:32:10,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2019-10-15 03:32:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4349. [2019-10-15 03:32:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4349 states. [2019-10-15 03:32:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 5699 transitions. [2019-10-15 03:32:11,238 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 5699 transitions. Word has length 186 [2019-10-15 03:32:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:11,239 INFO L462 AbstractCegarLoop]: Abstraction has 4349 states and 5699 transitions. [2019-10-15 03:32:11,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 5699 transitions. [2019-10-15 03:32:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-15 03:32:11,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:11,287 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:11,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:11,503 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:11,504 INFO L82 PathProgramCache]: Analyzing trace with hash -126022762, now seen corresponding path program 1 times [2019-10-15 03:32:11,504 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:11,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520996220] [2019-10-15 03:32:11,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:11,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:11,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-10-15 03:32:11,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520996220] [2019-10-15 03:32:11,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559439513] [2019-10-15 03:32:11,718 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 03:32:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:12,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:32:12,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-15 03:32:12,192 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-15 03:32:12,544 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:12,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-15 03:32:12,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317292161] [2019-10-15 03:32:12,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:32:12,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:32:12,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:32:12,546 INFO L87 Difference]: Start difference. First operand 4349 states and 5699 transitions. Second operand 6 states. [2019-10-15 03:32:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:13,405 INFO L93 Difference]: Finished difference Result 7285 states and 9681 transitions. [2019-10-15 03:32:13,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:32:13,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-10-15 03:32:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:13,439 INFO L225 Difference]: With dead ends: 7285 [2019-10-15 03:32:13,439 INFO L226 Difference]: Without dead ends: 5069 [2019-10-15 03:32:13,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:32:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2019-10-15 03:32:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 5069. [2019-10-15 03:32:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5069 states. [2019-10-15 03:32:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 6419 transitions. [2019-10-15 03:32:13,876 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 6419 transitions. Word has length 276 [2019-10-15 03:32:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:13,877 INFO L462 AbstractCegarLoop]: Abstraction has 5069 states and 6419 transitions. [2019-10-15 03:32:13,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:32:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 6419 transitions. [2019-10-15 03:32:13,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-15 03:32:13,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:13,910 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:14,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:14,118 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:14,119 INFO L82 PathProgramCache]: Analyzing trace with hash -207815019, now seen corresponding path program 1 times [2019-10-15 03:32:14,120 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:14,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236592099] [2019-10-15 03:32:14,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:14,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:14,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-15 03:32:14,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236592099] [2019-10-15 03:32:14,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041063858] [2019-10-15 03:32:14,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:14,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:14,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 03:32:14,644 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-15 03:32:15,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:15,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2019-10-15 03:32:15,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616633651] [2019-10-15 03:32:15,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:15,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:15,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:15,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:15,033 INFO L87 Difference]: Start difference. First operand 5069 states and 6419 transitions. Second operand 3 states. [2019-10-15 03:32:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:15,250 INFO L93 Difference]: Finished difference Result 7661 states and 10028 transitions. [2019-10-15 03:32:15,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:15,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2019-10-15 03:32:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:15,284 INFO L225 Difference]: With dead ends: 7661 [2019-10-15 03:32:15,285 INFO L226 Difference]: Without dead ends: 5081 [2019-10-15 03:32:15,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 553 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 03:32:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2019-10-15 03:32:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 5037. [2019-10-15 03:32:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5037 states. [2019-10-15 03:32:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 6299 transitions. [2019-10-15 03:32:15,600 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 6299 transitions. Word has length 276 [2019-10-15 03:32:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:15,601 INFO L462 AbstractCegarLoop]: Abstraction has 5037 states and 6299 transitions. [2019-10-15 03:32:15,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 6299 transitions. [2019-10-15 03:32:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 03:32:15,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:15,625 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:15,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:15,839 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:15,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:15,839 INFO L82 PathProgramCache]: Analyzing trace with hash 701511171, now seen corresponding path program 1 times [2019-10-15 03:32:15,840 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:15,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134613539] [2019-10-15 03:32:15,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:15,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:15,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-15 03:32:15,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134613539] [2019-10-15 03:32:15,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925014287] [2019-10-15 03:32:15,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:16,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:16,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 03:32:16,531 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-15 03:32:16,807 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:16,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:32:16,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870660754] [2019-10-15 03:32:16,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:16,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:16,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:16,813 INFO L87 Difference]: Start difference. First operand 5037 states and 6299 transitions. Second operand 3 states. [2019-10-15 03:32:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:17,207 INFO L93 Difference]: Finished difference Result 9349 states and 11973 transitions. [2019-10-15 03:32:17,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:17,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-15 03:32:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:17,272 INFO L225 Difference]: With dead ends: 9349 [2019-10-15 03:32:17,272 INFO L226 Difference]: Without dead ends: 6493 [2019-10-15 03:32:17,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6493 states. [2019-10-15 03:32:17,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6493 to 5571. [2019-10-15 03:32:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5571 states. [2019-10-15 03:32:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5571 states to 5571 states and 7069 transitions. [2019-10-15 03:32:17,695 INFO L78 Accepts]: Start accepts. Automaton has 5571 states and 7069 transitions. Word has length 202 [2019-10-15 03:32:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:17,697 INFO L462 AbstractCegarLoop]: Abstraction has 5571 states and 7069 transitions. [2019-10-15 03:32:17,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5571 states and 7069 transitions. [2019-10-15 03:32:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 03:32:17,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:17,723 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:17,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:17,937 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash 317482813, now seen corresponding path program 1 times [2019-10-15 03:32:17,938 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:17,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957974898] [2019-10-15 03:32:17,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:17,938 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:17,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-15 03:32:18,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957974898] [2019-10-15 03:32:18,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782573051] [2019-10-15 03:32:18,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:18,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:18,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 03:32:18,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-15 03:32:18,765 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:18,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:32:18,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195737963] [2019-10-15 03:32:18,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:18,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:18,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:18,768 INFO L87 Difference]: Start difference. First operand 5571 states and 7069 transitions. Second operand 3 states. [2019-10-15 03:32:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:19,079 INFO L93 Difference]: Finished difference Result 10103 states and 13174 transitions. [2019-10-15 03:32:19,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:19,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-15 03:32:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:19,122 INFO L225 Difference]: With dead ends: 10103 [2019-10-15 03:32:19,122 INFO L226 Difference]: Without dead ends: 7331 [2019-10-15 03:32:19,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2019-10-15 03:32:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 6331. [2019-10-15 03:32:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2019-10-15 03:32:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 8155 transitions. [2019-10-15 03:32:19,572 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 8155 transitions. Word has length 202 [2019-10-15 03:32:19,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:19,573 INFO L462 AbstractCegarLoop]: Abstraction has 6331 states and 8155 transitions. [2019-10-15 03:32:19,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 8155 transitions. [2019-10-15 03:32:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 03:32:19,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:19,607 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:19,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:19,816 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1468298496, now seen corresponding path program 1 times [2019-10-15 03:32:19,816 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:19,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322220658] [2019-10-15 03:32:19,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:19,817 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:19,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-15 03:32:20,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322220658] [2019-10-15 03:32:20,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213045444] [2019-10-15 03:32:20,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:20,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:20,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 03:32:20,537 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-15 03:32:20,808 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:20,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-15 03:32:20,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506638180] [2019-10-15 03:32:20,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:20,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:20,810 INFO L87 Difference]: Start difference. First operand 6331 states and 8155 transitions. Second operand 4 states. [2019-10-15 03:32:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:21,256 INFO L93 Difference]: Finished difference Result 10784 states and 13815 transitions. [2019-10-15 03:32:21,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:21,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-10-15 03:32:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:21,296 INFO L225 Difference]: With dead ends: 10784 [2019-10-15 03:32:21,296 INFO L226 Difference]: Without dead ends: 7679 [2019-10-15 03:32:21,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 397 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2019-10-15 03:32:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7679. [2019-10-15 03:32:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7679 states. [2019-10-15 03:32:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 9511 transitions. [2019-10-15 03:32:21,854 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 9511 transitions. Word has length 202 [2019-10-15 03:32:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:21,855 INFO L462 AbstractCegarLoop]: Abstraction has 7679 states and 9511 transitions. [2019-10-15 03:32:21,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 9511 transitions. [2019-10-15 03:32:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 03:32:21,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:21,905 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:22,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:22,119 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:22,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1653092256, now seen corresponding path program 2 times [2019-10-15 03:32:22,121 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:22,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333008876] [2019-10-15 03:32:22,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:22,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:22,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-15 03:32:22,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333008876] [2019-10-15 03:32:22,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131962438] [2019-10-15 03:32:22,213 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:22,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:32:22,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:32:22,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-15 03:32:22,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 03:32:22,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:23,208 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-10-15 03:32:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-10-15 03:32:23,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:23,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-10-15 03:32:23,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106175573] [2019-10-15 03:32:23,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:23,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:23,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:32:23,298 INFO L87 Difference]: Start difference. First operand 7679 states and 9511 transitions. Second operand 4 states. [2019-10-15 03:32:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:23,761 INFO L93 Difference]: Finished difference Result 13825 states and 17109 transitions. [2019-10-15 03:32:23,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:23,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-10-15 03:32:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:23,800 INFO L225 Difference]: With dead ends: 13825 [2019-10-15 03:32:23,801 INFO L226 Difference]: Without dead ends: 9535 [2019-10-15 03:32:23,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:32:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2019-10-15 03:32:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 9503. [2019-10-15 03:32:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9503 states. [2019-10-15 03:32:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9503 states to 9503 states and 11359 transitions. [2019-10-15 03:32:24,365 INFO L78 Accepts]: Start accepts. Automaton has 9503 states and 11359 transitions. Word has length 202 [2019-10-15 03:32:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:24,366 INFO L462 AbstractCegarLoop]: Abstraction has 9503 states and 11359 transitions. [2019-10-15 03:32:24,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9503 states and 11359 transitions. [2019-10-15 03:32:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-15 03:32:24,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:24,401 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:24,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:24,608 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -622035404, now seen corresponding path program 1 times [2019-10-15 03:32:24,609 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:24,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204166920] [2019-10-15 03:32:24,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:24,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:24,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-10-15 03:32:24,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204166920] [2019-10-15 03:32:24,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617359445] [2019-10-15 03:32:24,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:25,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:32:25,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-15 03:32:25,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-10-15 03:32:25,741 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:25,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-15 03:32:25,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266024051] [2019-10-15 03:32:25,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:32:25,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:32:25,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:32:25,746 INFO L87 Difference]: Start difference. First operand 9503 states and 11359 transitions. Second operand 6 states. [2019-10-15 03:32:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:26,733 INFO L93 Difference]: Finished difference Result 15375 states and 18643 transitions. [2019-10-15 03:32:26,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:32:26,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-10-15 03:32:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:26,774 INFO L225 Difference]: With dead ends: 15375 [2019-10-15 03:32:26,774 INFO L226 Difference]: Without dead ends: 10191 [2019-10-15 03:32:26,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:32:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2019-10-15 03:32:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10191. [2019-10-15 03:32:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10191 states. [2019-10-15 03:32:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10191 states to 10191 states and 11951 transitions. [2019-10-15 03:32:27,350 INFO L78 Accepts]: Start accepts. Automaton has 10191 states and 11951 transitions. Word has length 276 [2019-10-15 03:32:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:27,350 INFO L462 AbstractCegarLoop]: Abstraction has 10191 states and 11951 transitions. [2019-10-15 03:32:27,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:32:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 10191 states and 11951 transitions. [2019-10-15 03:32:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-10-15 03:32:27,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:27,366 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:27,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:27,568 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1836045459, now seen corresponding path program 1 times [2019-10-15 03:32:27,569 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:27,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867477569] [2019-10-15 03:32:27,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:27,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:27,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-15 03:32:27,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867477569] [2019-10-15 03:32:27,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064513316] [2019-10-15 03:32:27,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:28,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:28,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 162 proven. 4 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:32:28,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:29,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:29,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:29,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:29,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-10-15 03:32:29,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819122522] [2019-10-15 03:32:29,302 INFO L162 IcfgInterpreter]: Started Sifa with 119 locations of interest [2019-10-15 03:32:29,302 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:32:29,311 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:32:29,317 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:32:29,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:32:29,747 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 82 for LOIs [2019-10-15 03:32:29,819 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 139 for LOIs [2019-10-15 03:32:30,659 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 89 for LOIs [2019-10-15 03:32:30,755 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 148 for LOIs