/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:14:42,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:14:42,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:14:42,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:14:42,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:14:42,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:14:42,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:14:42,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:14:42,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:14:42,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:14:42,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:14:42,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:14:42,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:14:42,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:14:42,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:14:42,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:14:42,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:14:42,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:14:42,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:14:42,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:14:42,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:14:42,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:14:42,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:14:42,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:14:42,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:14:42,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:14:42,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:14:42,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:14:42,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:14:42,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:14:42,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:14:42,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:14:42,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:14:42,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:14:42,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:14:42,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:14:42,561 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 [2019-11-07 01:14:42,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:14:42,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:14:42,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:14:42,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:14:42,585 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:14:42,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:14:42,585 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:14:42,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:14:42,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:14:42,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:14:42,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:14:42,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:14:42,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:14:42,588 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:14:42,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:14:42,588 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:14:42,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:14:42,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:14:42,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:14:42,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:14:42,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:14:42,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:14:42,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:14:42,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:14:42,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:14:42,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:14:42,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:14:42,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:14:42,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 01:14:42,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:14:42,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:14:42,940 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:14:42,942 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:14:42,942 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:14:42,943 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-11-07 01:14:43,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd059b927/40278090c39942de8f0a8587f21f0cf2/FLAG5e27b8f4d [2019-11-07 01:14:43,525 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:14:43,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2019-11-07 01:14:43,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd059b927/40278090c39942de8f0a8587f21f0cf2/FLAG5e27b8f4d [2019-11-07 01:14:43,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd059b927/40278090c39942de8f0a8587f21f0cf2 [2019-11-07 01:14:43,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:14:43,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:14:43,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:14:43,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:14:43,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:14:43,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10bb15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43, skipping insertion in model container [2019-11-07 01:14:43,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,850 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:14:43,904 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:14:44,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:14:44,199 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:14:44,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:14:44,351 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:14:44,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44 WrapperNode [2019-11-07 01:14:44,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:14:44,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:14:44,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:14:44,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:14:44,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (1/1) ... [2019-11-07 01:14:44,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:14:44,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:14:44,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:14:44,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:14:44,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (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 [2019-11-07 01:14:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:14:44,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:14:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 01:14:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 01:14:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 01:14:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-11-07 01:14:44,467 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 01:14:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 01:14:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-11-07 01:14:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 01:14:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 01:14:44,468 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 01:14:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 01:14:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 01:14:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 01:14:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 01:14:44,469 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 01:14:44,470 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 01:14:44,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 01:14:44,470 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 01:14:44,470 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 01:14:44,470 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 01:14:44,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:14:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:14:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 01:14:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 01:14:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 01:14:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-11-07 01:14:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 01:14:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:14:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 01:14:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 01:14:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-11-07 01:14:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 01:14:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 01:14:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 01:14:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 01:14:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 01:14:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 01:14:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 01:14:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 01:14:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 01:14:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 01:14:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 01:14:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 01:14:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:14:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:14:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:14:45,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:14:45,107 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:14:45,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:45 BoogieIcfgContainer [2019-11-07 01:14:45,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:14:45,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:14:45,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:14:45,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:14:45,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:14:43" (1/3) ... [2019-11-07 01:14:45,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e19a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:45, skipping insertion in model container [2019-11-07 01:14:45,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:44" (2/3) ... [2019-11-07 01:14:45,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e19a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:45, skipping insertion in model container [2019-11-07 01:14:45,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:45" (3/3) ... [2019-11-07 01:14:45,118 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2019-11-07 01:14:45,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:14:45,139 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:14:45,151 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:14:45,180 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:14:45,180 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:14:45,180 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:14:45,180 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:14:45,180 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:14:45,181 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:14:45,181 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:14:45,181 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:14:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2019-11-07 01:14:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 01:14:45,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:45,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:45,223 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash -67309704, now seen corresponding path program 1 times [2019-11-07 01:14:45,240 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:45,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099485849] [2019-11-07 01:14:45,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:45,604 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099485849] [2019-11-07 01:14:45,605 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:45,606 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:45,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540947335] [2019-11-07 01:14:45,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:45,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:45,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:45,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:45,639 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2019-11-07 01:14:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:46,311 INFO L93 Difference]: Finished difference Result 375 states and 554 transitions. [2019-11-07 01:14:46,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:46,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2019-11-07 01:14:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:46,341 INFO L225 Difference]: With dead ends: 375 [2019-11-07 01:14:46,341 INFO L226 Difference]: Without dead ends: 202 [2019-11-07 01:14:46,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-07 01:14:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 172. [2019-11-07 01:14:46,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-07 01:14:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 234 transitions. [2019-11-07 01:14:46,487 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 234 transitions. Word has length 92 [2019-11-07 01:14:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:46,488 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 234 transitions. [2019-11-07 01:14:46,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:46,489 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 234 transitions. [2019-11-07 01:14:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 01:14:46,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:46,503 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:46,503 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash -559935878, now seen corresponding path program 1 times [2019-11-07 01:14:46,504 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:46,504 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425338105] [2019-11-07 01:14:46,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:46,689 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425338105] [2019-11-07 01:14:46,690 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:46,690 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:46,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36945677] [2019-11-07 01:14:46,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:46,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:46,696 INFO L87 Difference]: Start difference. First operand 172 states and 234 transitions. Second operand 5 states. [2019-11-07 01:14:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:47,209 INFO L93 Difference]: Finished difference Result 352 states and 494 transitions. [2019-11-07 01:14:47,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:47,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2019-11-07 01:14:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:47,214 INFO L225 Difference]: With dead ends: 352 [2019-11-07 01:14:47,214 INFO L226 Difference]: Without dead ends: 200 [2019-11-07 01:14:47,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-07 01:14:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2019-11-07 01:14:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-07 01:14:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 233 transitions. [2019-11-07 01:14:47,239 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 233 transitions. Word has length 92 [2019-11-07 01:14:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:47,239 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 233 transitions. [2019-11-07 01:14:47,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 233 transitions. [2019-11-07 01:14:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 01:14:47,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:47,242 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:47,242 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash 394004280, now seen corresponding path program 1 times [2019-11-07 01:14:47,243 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:47,243 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116984397] [2019-11-07 01:14:47,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:47,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116984397] [2019-11-07 01:14:47,332 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:47,332 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:47,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228569609] [2019-11-07 01:14:47,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:47,333 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:47,334 INFO L87 Difference]: Start difference. First operand 172 states and 233 transitions. Second operand 5 states. [2019-11-07 01:14:47,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:47,774 INFO L93 Difference]: Finished difference Result 369 states and 520 transitions. [2019-11-07 01:14:47,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:47,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2019-11-07 01:14:47,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:47,778 INFO L225 Difference]: With dead ends: 369 [2019-11-07 01:14:47,778 INFO L226 Difference]: Without dead ends: 217 [2019-11-07 01:14:47,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-11-07 01:14:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2019-11-07 01:14:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-07 01:14:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 232 transitions. [2019-11-07 01:14:47,808 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 232 transitions. Word has length 92 [2019-11-07 01:14:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:47,809 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 232 transitions. [2019-11-07 01:14:47,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 232 transitions. [2019-11-07 01:14:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 01:14:47,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:47,816 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:47,817 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash -822149446, now seen corresponding path program 1 times [2019-11-07 01:14:47,818 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:47,818 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175802792] [2019-11-07 01:14:47,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:47,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175802792] [2019-11-07 01:14:47,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:47,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:47,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350759038] [2019-11-07 01:14:47,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:47,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:47,904 INFO L87 Difference]: Start difference. First operand 172 states and 232 transitions. Second operand 5 states. [2019-11-07 01:14:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:48,309 INFO L93 Difference]: Finished difference Result 363 states and 509 transitions. [2019-11-07 01:14:48,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:48,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2019-11-07 01:14:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:48,313 INFO L225 Difference]: With dead ends: 363 [2019-11-07 01:14:48,313 INFO L226 Difference]: Without dead ends: 211 [2019-11-07 01:14:48,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-07 01:14:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 172. [2019-11-07 01:14:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-07 01:14:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 231 transitions. [2019-11-07 01:14:48,335 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 231 transitions. Word has length 92 [2019-11-07 01:14:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:48,336 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 231 transitions. [2019-11-07 01:14:48,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 231 transitions. [2019-11-07 01:14:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 01:14:48,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:48,338 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:48,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1554116872, now seen corresponding path program 1 times [2019-11-07 01:14:48,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:48,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724492057] [2019-11-07 01:14:48,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:48,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724492057] [2019-11-07 01:14:48,426 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:48,426 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:48,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428374475] [2019-11-07 01:14:48,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:48,427 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:48,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:48,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:48,428 INFO L87 Difference]: Start difference. First operand 172 states and 231 transitions. Second operand 5 states. [2019-11-07 01:14:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:48,974 INFO L93 Difference]: Finished difference Result 365 states and 508 transitions. [2019-11-07 01:14:48,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:48,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2019-11-07 01:14:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:48,977 INFO L225 Difference]: With dead ends: 365 [2019-11-07 01:14:48,977 INFO L226 Difference]: Without dead ends: 213 [2019-11-07 01:14:48,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-07 01:14:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 172. [2019-11-07 01:14:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-07 01:14:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 230 transitions. [2019-11-07 01:14:49,010 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 230 transitions. Word has length 92 [2019-11-07 01:14:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:49,011 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 230 transitions. [2019-11-07 01:14:49,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 230 transitions. [2019-11-07 01:14:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-07 01:14:49,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:49,013 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:49,013 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1054670586, now seen corresponding path program 1 times [2019-11-07 01:14:49,014 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:49,014 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951217885] [2019-11-07 01:14:49,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:49,068 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951217885] [2019-11-07 01:14:49,068 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:49,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:49,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408094681] [2019-11-07 01:14:49,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:49,069 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:49,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:49,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:49,070 INFO L87 Difference]: Start difference. First operand 172 states and 230 transitions. Second operand 4 states. [2019-11-07 01:14:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:49,262 INFO L93 Difference]: Finished difference Result 460 states and 640 transitions. [2019-11-07 01:14:49,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:49,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-11-07 01:14:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:49,265 INFO L225 Difference]: With dead ends: 460 [2019-11-07 01:14:49,265 INFO L226 Difference]: Without dead ends: 309 [2019-11-07 01:14:49,267 INFO L630 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 [2019-11-07 01:14:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-11-07 01:14:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2019-11-07 01:14:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2019-11-07 01:14:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 408 transitions. [2019-11-07 01:14:49,299 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 408 transitions. Word has length 92 [2019-11-07 01:14:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:49,300 INFO L462 AbstractCegarLoop]: Abstraction has 308 states and 408 transitions. [2019-11-07 01:14:49,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 408 transitions. [2019-11-07 01:14:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 01:14:49,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:49,303 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:49,303 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:49,304 INFO L82 PathProgramCache]: Analyzing trace with hash -922442114, now seen corresponding path program 1 times [2019-11-07 01:14:49,304 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:49,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014443372] [2019-11-07 01:14:49,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:14:49,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014443372] [2019-11-07 01:14:49,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043203108] [2019-11-07 01:14:49,398 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 [2019-11-07 01:14:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:49,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:49,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 01:14:49,586 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:14:49,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:49,781 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-07 01:14:49,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854445949] [2019-11-07 01:14:49,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:49,782 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:49,783 INFO L87 Difference]: Start difference. First operand 308 states and 408 transitions. Second operand 3 states. [2019-11-07 01:14:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:49,856 INFO L93 Difference]: Finished difference Result 868 states and 1193 transitions. [2019-11-07 01:14:49,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:49,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-11-07 01:14:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:49,868 INFO L225 Difference]: With dead ends: 868 [2019-11-07 01:14:49,869 INFO L226 Difference]: Without dead ends: 582 [2019-11-07 01:14:49,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2019-11-07 01:14:49,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 572. [2019-11-07 01:14:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-07 01:14:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 787 transitions. [2019-11-07 01:14:49,952 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 787 transitions. Word has length 147 [2019-11-07 01:14:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:49,954 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 787 transitions. [2019-11-07 01:14:49,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 787 transitions. [2019-11-07 01:14:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-07 01:14:49,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:49,962 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:50,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:50,170 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2126273741, now seen corresponding path program 1 times [2019-11-07 01:14:50,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:50,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763282433] [2019-11-07 01:14:50,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 01:14:50,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763282433] [2019-11-07 01:14:50,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116818553] [2019-11-07 01:14:50,249 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 [2019-11-07 01:14:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:50,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:50,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-07 01:14:50,480 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 01:14:50,667 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:50,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 7 [2019-11-07 01:14:50,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508121592] [2019-11-07 01:14:50,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:50,671 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:50,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:50,672 INFO L87 Difference]: Start difference. First operand 572 states and 787 transitions. Second operand 3 states. [2019-11-07 01:14:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:50,762 INFO L93 Difference]: Finished difference Result 1615 states and 2336 transitions. [2019-11-07 01:14:50,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:50,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2019-11-07 01:14:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:50,773 INFO L225 Difference]: With dead ends: 1615 [2019-11-07 01:14:50,773 INFO L226 Difference]: Without dead ends: 1071 [2019-11-07 01:14:50,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2019-11-07 01:14:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1069. [2019-11-07 01:14:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-11-07 01:14:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1531 transitions. [2019-11-07 01:14:50,877 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1531 transitions. Word has length 166 [2019-11-07 01:14:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:50,877 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1531 transitions. [2019-11-07 01:14:50,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1531 transitions. [2019-11-07 01:14:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 01:14:50,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:50,888 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:51,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:51,101 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2039026306, now seen corresponding path program 1 times [2019-11-07 01:14:51,102 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:51,102 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867888607] [2019-11-07 01:14:51,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:14:51,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867888607] [2019-11-07 01:14:51,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:51,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:51,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123717294] [2019-11-07 01:14:51,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:51,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:51,149 INFO L87 Difference]: Start difference. First operand 1069 states and 1531 transitions. Second operand 4 states. [2019-11-07 01:14:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:51,322 INFO L93 Difference]: Finished difference Result 1925 states and 2719 transitions. [2019-11-07 01:14:51,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:51,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-11-07 01:14:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:51,329 INFO L225 Difference]: With dead ends: 1925 [2019-11-07 01:14:51,330 INFO L226 Difference]: Without dead ends: 882 [2019-11-07 01:14:51,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2019-11-07 01:14:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2019-11-07 01:14:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2019-11-07 01:14:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1223 transitions. [2019-11-07 01:14:51,409 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1223 transitions. Word has length 147 [2019-11-07 01:14:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:51,409 INFO L462 AbstractCegarLoop]: Abstraction has 882 states and 1223 transitions. [2019-11-07 01:14:51,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1223 transitions. [2019-11-07 01:14:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 01:14:51,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:51,416 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:51,416 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1888133693, now seen corresponding path program 1 times [2019-11-07 01:14:51,417 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:51,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197899995] [2019-11-07 01:14:51,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-07 01:14:51,529 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197899995] [2019-11-07 01:14:51,529 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:51,530 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:51,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390789541] [2019-11-07 01:14:51,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:51,531 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:51,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:51,531 INFO L87 Difference]: Start difference. First operand 882 states and 1223 transitions. Second operand 4 states. [2019-11-07 01:14:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:51,746 INFO L93 Difference]: Finished difference Result 1737 states and 2409 transitions. [2019-11-07 01:14:51,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:51,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 167 [2019-11-07 01:14:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:51,756 INFO L225 Difference]: With dead ends: 1737 [2019-11-07 01:14:51,756 INFO L226 Difference]: Without dead ends: 876 [2019-11-07 01:14:51,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2019-11-07 01:14:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2019-11-07 01:14:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2019-11-07 01:14:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1211 transitions. [2019-11-07 01:14:51,863 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1211 transitions. Word has length 167 [2019-11-07 01:14:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:51,863 INFO L462 AbstractCegarLoop]: Abstraction has 876 states and 1211 transitions. [2019-11-07 01:14:51,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1211 transitions. [2019-11-07 01:14:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 01:14:51,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:51,867 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:51,868 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash 627343757, now seen corresponding path program 1 times [2019-11-07 01:14:51,868 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:51,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194384028] [2019-11-07 01:14:51,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:14:51,972 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194384028] [2019-11-07 01:14:51,972 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873051214] [2019-11-07 01:14:51,972 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 [2019-11-07 01:14:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:52,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:52,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:14:52,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:14:52,345 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:52,345 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 9 [2019-11-07 01:14:52,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822452624] [2019-11-07 01:14:52,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:52,346 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:52,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:52,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:52,347 INFO L87 Difference]: Start difference. First operand 876 states and 1211 transitions. Second operand 5 states. [2019-11-07 01:14:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:52,679 INFO L93 Difference]: Finished difference Result 1477 states and 2072 transitions. [2019-11-07 01:14:52,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:52,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-11-07 01:14:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:52,687 INFO L225 Difference]: With dead ends: 1477 [2019-11-07 01:14:52,688 INFO L226 Difference]: Without dead ends: 950 [2019-11-07 01:14:52,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2019-11-07 01:14:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 948. [2019-11-07 01:14:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2019-11-07 01:14:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1289 transitions. [2019-11-07 01:14:52,821 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1289 transitions. Word has length 148 [2019-11-07 01:14:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:52,822 INFO L462 AbstractCegarLoop]: Abstraction has 948 states and 1289 transitions. [2019-11-07 01:14:52,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1289 transitions. [2019-11-07 01:14:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-07 01:14:52,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:52,831 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:53,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:53,036 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:53,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2107263254, now seen corresponding path program 1 times [2019-11-07 01:14:53,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:53,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948693840] [2019-11-07 01:14:53,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-07 01:14:53,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948693840] [2019-11-07 01:14:53,174 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766166250] [2019-11-07 01:14:53,174 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 [2019-11-07 01:14:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:53,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:14:53,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-07 01:14:53,452 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-07 01:14:53,706 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:53,709 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2019-11-07 01:14:53,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499667869] [2019-11-07 01:14:53,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:53,713 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:53,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:53,713 INFO L87 Difference]: Start difference. First operand 948 states and 1289 transitions. Second operand 3 states. [2019-11-07 01:14:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:53,890 INFO L93 Difference]: Finished difference Result 2758 states and 3899 transitions. [2019-11-07 01:14:53,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:53,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2019-11-07 01:14:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:53,909 INFO L225 Difference]: With dead ends: 2758 [2019-11-07 01:14:53,909 INFO L226 Difference]: Without dead ends: 1831 [2019-11-07 01:14:53,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 377 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2019-11-07 01:14:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1813. [2019-11-07 01:14:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1813 states. [2019-11-07 01:14:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2477 transitions. [2019-11-07 01:14:54,079 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2477 transitions. Word has length 192 [2019-11-07 01:14:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:54,080 INFO L462 AbstractCegarLoop]: Abstraction has 1813 states and 2477 transitions. [2019-11-07 01:14:54,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2477 transitions. [2019-11-07 01:14:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-07 01:14:54,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:54,086 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:54,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:54,292 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:54,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2094777522, now seen corresponding path program 1 times [2019-11-07 01:14:54,292 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:54,293 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831731892] [2019-11-07 01:14:54,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-07 01:14:54,390 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831731892] [2019-11-07 01:14:54,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673564225] [2019-11-07 01:14:54,391 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 [2019-11-07 01:14:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:54,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:54,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:14:54,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-07 01:14:54,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:54,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-11-07 01:14:54,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969602579] [2019-11-07 01:14:54,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:54,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:54,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:54,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:54,811 INFO L87 Difference]: Start difference. First operand 1813 states and 2477 transitions. Second operand 4 states. [2019-11-07 01:14:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:55,274 INFO L93 Difference]: Finished difference Result 4492 states and 6512 transitions. [2019-11-07 01:14:55,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:55,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 191 [2019-11-07 01:14:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:55,294 INFO L225 Difference]: With dead ends: 4492 [2019-11-07 01:14:55,294 INFO L226 Difference]: Without dead ends: 2700 [2019-11-07 01:14:55,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2019-11-07 01:14:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2680. [2019-11-07 01:14:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2680 states. [2019-11-07 01:14:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3605 transitions. [2019-11-07 01:14:55,528 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3605 transitions. Word has length 191 [2019-11-07 01:14:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:55,529 INFO L462 AbstractCegarLoop]: Abstraction has 2680 states and 3605 transitions. [2019-11-07 01:14:55,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3605 transitions. [2019-11-07 01:14:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-07 01:14:55,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:55,541 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:55,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:55,747 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:55,747 INFO L82 PathProgramCache]: Analyzing trace with hash 723058041, now seen corresponding path program 1 times [2019-11-07 01:14:55,747 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:55,748 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068050612] [2019-11-07 01:14:55,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:14:55,853 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068050612] [2019-11-07 01:14:55,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651508234] [2019-11-07 01:14:55,859 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 [2019-11-07 01:14:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:56,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:56,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:14:56,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-07 01:14:56,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:56,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-11-07 01:14:56,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790489298] [2019-11-07 01:14:56,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:56,558 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:56,559 INFO L87 Difference]: Start difference. First operand 2680 states and 3605 transitions. Second operand 4 states. [2019-11-07 01:14:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:56,897 INFO L93 Difference]: Finished difference Result 5612 states and 7769 transitions. [2019-11-07 01:14:56,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:56,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 211 [2019-11-07 01:14:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:56,916 INFO L225 Difference]: With dead ends: 5612 [2019-11-07 01:14:56,916 INFO L226 Difference]: Without dead ends: 2954 [2019-11-07 01:14:56,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 415 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2019-11-07 01:14:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2676. [2019-11-07 01:14:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2676 states. [2019-11-07 01:14:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3522 transitions. [2019-11-07 01:14:57,232 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3522 transitions. Word has length 211 [2019-11-07 01:14:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:57,233 INFO L462 AbstractCegarLoop]: Abstraction has 2676 states and 3522 transitions. [2019-11-07 01:14:57,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3522 transitions. [2019-11-07 01:14:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2019-11-07 01:14:57,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:57,255 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:57,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:57,463 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1632595271, now seen corresponding path program 1 times [2019-11-07 01:14:57,464 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:57,464 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956258703] [2019-11-07 01:14:57,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-11-07 01:14:57,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956258703] [2019-11-07 01:14:57,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746701485] [2019-11-07 01:14:57,650 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 [2019-11-07 01:14:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:57,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:14:57,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-11-07 01:14:58,000 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-07 01:14:58,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:58,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:14:58,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105092115] [2019-11-07 01:14:58,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:58,434 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:58,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:14:58,435 INFO L87 Difference]: Start difference. First operand 2676 states and 3522 transitions. Second operand 5 states. [2019-11-07 01:14:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:59,264 INFO L93 Difference]: Finished difference Result 6129 states and 8647 transitions. [2019-11-07 01:14:59,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:14:59,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2019-11-07 01:14:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:59,292 INFO L225 Difference]: With dead ends: 6129 [2019-11-07 01:14:59,292 INFO L226 Difference]: Without dead ends: 3475 [2019-11-07 01:14:59,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 601 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:14:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2019-11-07 01:14:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3025. [2019-11-07 01:14:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3025 states. [2019-11-07 01:14:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 3869 transitions. [2019-11-07 01:14:59,602 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 3869 transitions. Word has length 305 [2019-11-07 01:14:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:59,603 INFO L462 AbstractCegarLoop]: Abstraction has 3025 states and 3869 transitions. [2019-11-07 01:14:59,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 3869 transitions. [2019-11-07 01:14:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-11-07 01:14:59,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:59,615 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:59,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:59,821 INFO L410 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash -121475737, now seen corresponding path program 1 times [2019-11-07 01:14:59,822 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:59,822 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750910963] [2019-11-07 01:14:59,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-11-07 01:15:00,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750910963] [2019-11-07 01:15:00,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295566208] [2019-11-07 01:15:00,015 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 [2019-11-07 01:15:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:00,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:15:00,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2019-11-07 01:15:00,383 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-07 01:15:00,675 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:00,675 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:15:00,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890118894] [2019-11-07 01:15:00,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:15:00,676 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:15:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:15:00,677 INFO L87 Difference]: Start difference. First operand 3025 states and 3869 transitions. Second operand 5 states. [2019-11-07 01:15:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:02,180 INFO L93 Difference]: Finished difference Result 9483 states and 12412 transitions. [2019-11-07 01:15:02,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:15:02,180 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 306 [2019-11-07 01:15:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:02,222 INFO L225 Difference]: With dead ends: 9483 [2019-11-07 01:15:02,223 INFO L226 Difference]: Without dead ends: 6478 [2019-11-07 01:15:02,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 603 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:15:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2019-11-07 01:15:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 6024. [2019-11-07 01:15:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2019-11-07 01:15:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 7676 transitions. [2019-11-07 01:15:02,783 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 7676 transitions. Word has length 306 [2019-11-07 01:15:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:02,784 INFO L462 AbstractCegarLoop]: Abstraction has 6024 states and 7676 transitions. [2019-11-07 01:15:02,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:15:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 7676 transitions. [2019-11-07 01:15:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-07 01:15:02,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:02,796 INFO L410 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:03,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:03,002 INFO L410 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:03,003 INFO L82 PathProgramCache]: Analyzing trace with hash -291533407, now seen corresponding path program 1 times [2019-11-07 01:15:03,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:03,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216704598] [2019-11-07 01:15:03,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-07 01:15:03,079 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216704598] [2019-11-07 01:15:03,079 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090695048] [2019-11-07 01:15:03,079 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 [2019-11-07 01:15:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:03,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:15:03,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-07 01:15:03,506 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-07 01:15:03,685 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:03,685 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 9 [2019-11-07 01:15:03,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048906074] [2019-11-07 01:15:03,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:15:03,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:15:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:15:03,687 INFO L87 Difference]: Start difference. First operand 6024 states and 7676 transitions. Second operand 3 states. [2019-11-07 01:15:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:04,067 INFO L93 Difference]: Finished difference Result 10442 states and 13448 transitions. [2019-11-07 01:15:04,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:15:04,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2019-11-07 01:15:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:04,122 INFO L225 Difference]: With dead ends: 10442 [2019-11-07 01:15:04,122 INFO L226 Difference]: Without dead ends: 6414 [2019-11-07 01:15:04,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 423 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:15:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2019-11-07 01:15:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 6410. [2019-11-07 01:15:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6410 states. [2019-11-07 01:15:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 8038 transitions. [2019-11-07 01:15:04,617 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 8038 transitions. Word has length 213 [2019-11-07 01:15:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:04,620 INFO L462 AbstractCegarLoop]: Abstraction has 6410 states and 8038 transitions. [2019-11-07 01:15:04,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:15:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 8038 transitions. [2019-11-07 01:15:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-07 01:15:04,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:04,631 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:04,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:04,836 INFO L410 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1932086386, now seen corresponding path program 1 times [2019-11-07 01:15:04,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:04,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608432314] [2019-11-07 01:15:04,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-07 01:15:04,926 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608432314] [2019-11-07 01:15:04,926 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794088097] [2019-11-07 01:15:04,926 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 [2019-11-07 01:15:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:05,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:15:05,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:15:05,282 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-07 01:15:05,412 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:05,413 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 8 [2019-11-07 01:15:05,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901099619] [2019-11-07 01:15:05,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:15:05,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:15:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:15:05,414 INFO L87 Difference]: Start difference. First operand 6410 states and 8038 transitions. Second operand 3 states. [2019-11-07 01:15:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:05,984 INFO L93 Difference]: Finished difference Result 18183 states and 23713 transitions. [2019-11-07 01:15:05,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:15:05,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2019-11-07 01:15:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:06,047 INFO L225 Difference]: With dead ends: 18183 [2019-11-07 01:15:06,048 INFO L226 Difference]: Without dead ends: 11795 [2019-11-07 01:15:06,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:15:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11795 states. [2019-11-07 01:15:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11795 to 11791. [2019-11-07 01:15:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11791 states. [2019-11-07 01:15:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11791 states to 11791 states and 15175 transitions. [2019-11-07 01:15:07,125 INFO L78 Accepts]: Start accepts. Automaton has 11791 states and 15175 transitions. Word has length 213 [2019-11-07 01:15:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:07,126 INFO L462 AbstractCegarLoop]: Abstraction has 11791 states and 15175 transitions. [2019-11-07 01:15:07,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:15:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 11791 states and 15175 transitions. [2019-11-07 01:15:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-11-07 01:15:07,145 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:07,145 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:07,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:07,354 INFO L410 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2101514015, now seen corresponding path program 1 times [2019-11-07 01:15:07,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:07,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840818362] [2019-11-07 01:15:07,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-11-07 01:15:07,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840818362] [2019-11-07 01:15:07,492 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:15:07,493 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:15:07,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137847615] [2019-11-07 01:15:07,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:15:07,495 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:15:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:15:07,496 INFO L87 Difference]: Start difference. First operand 11791 states and 15175 transitions. Second operand 4 states. [2019-11-07 01:15:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:08,120 INFO L93 Difference]: Finished difference Result 20884 states and 26808 transitions. [2019-11-07 01:15:08,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:15:08,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 306 [2019-11-07 01:15:08,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:08,165 INFO L225 Difference]: With dead ends: 20884 [2019-11-07 01:15:08,165 INFO L226 Difference]: Without dead ends: 9114 [2019-11-07 01:15:08,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:15:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9114 states. [2019-11-07 01:15:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9114 to 9114. [2019-11-07 01:15:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9114 states. [2019-11-07 01:15:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9114 states to 9114 states and 11657 transitions. [2019-11-07 01:15:08,881 INFO L78 Accepts]: Start accepts. Automaton has 9114 states and 11657 transitions. Word has length 306 [2019-11-07 01:15:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:08,882 INFO L462 AbstractCegarLoop]: Abstraction has 9114 states and 11657 transitions. [2019-11-07 01:15:08,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:15:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9114 states and 11657 transitions. [2019-11-07 01:15:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-11-07 01:15:08,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:08,926 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:08,926 INFO L410 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1074423709, now seen corresponding path program 1 times [2019-11-07 01:15:08,927 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:08,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842585458] [2019-11-07 01:15:08,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-11-07 01:15:09,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842585458] [2019-11-07 01:15:09,065 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531576332] [2019-11-07 01:15:09,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:15:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:09,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:15:09,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2019-11-07 01:15:09,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-07 01:15:10,292 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:10,292 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:15:10,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825201034] [2019-11-07 01:15:10,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:15:10,293 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:15:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:15:10,294 INFO L87 Difference]: Start difference. First operand 9114 states and 11657 transitions. Second operand 5 states. [2019-11-07 01:15:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:11,293 INFO L93 Difference]: Finished difference Result 18206 states and 23424 transitions. [2019-11-07 01:15:11,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:15:11,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 306 [2019-11-07 01:15:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:11,333 INFO L225 Difference]: With dead ends: 18206 [2019-11-07 01:15:11,333 INFO L226 Difference]: Without dead ends: 9114 [2019-11-07 01:15:11,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 603 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:15:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9114 states. [2019-11-07 01:15:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9114 to 9114. [2019-11-07 01:15:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9114 states. [2019-11-07 01:15:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9114 states to 9114 states and 11522 transitions. [2019-11-07 01:15:11,929 INFO L78 Accepts]: Start accepts. Automaton has 9114 states and 11522 transitions. Word has length 306 [2019-11-07 01:15:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:11,929 INFO L462 AbstractCegarLoop]: Abstraction has 9114 states and 11522 transitions. [2019-11-07 01:15:11,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:15:11,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9114 states and 11522 transitions. [2019-11-07 01:15:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-07 01:15:11,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:11,943 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:12,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:12,148 INFO L410 AbstractCegarLoop]: === Iteration 21 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash 134763647, now seen corresponding path program 1 times [2019-11-07 01:15:12,149 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:12,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298539026] [2019-11-07 01:15:12,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:15:12,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298539026] [2019-11-07 01:15:12,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791578436] [2019-11-07 01:15:12,227 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 [2019-11-07 01:15:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:12,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:15:12,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:15:12,582 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-07 01:15:12,938 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:15:12,938 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 10 [2019-11-07 01:15:12,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074342689] [2019-11-07 01:15:12,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:15:12,940 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:12,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:15:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:15:12,941 INFO L87 Difference]: Start difference. First operand 9114 states and 11522 transitions. Second operand 6 states. [2019-11-07 01:15:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:13,982 INFO L93 Difference]: Finished difference Result 19610 states and 27320 transitions. [2019-11-07 01:15:13,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:15:13,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 213 [2019-11-07 01:15:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:14,029 INFO L225 Difference]: With dead ends: 19610 [2019-11-07 01:15:14,029 INFO L226 Difference]: Without dead ends: 10518 [2019-11-07 01:15:14,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 419 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:15:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states.