/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/kundu2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:14:14,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:14:14,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:14:14,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:14:14,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:14:14,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:14:14,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:14:14,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:14:14,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:14:14,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:14:14,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:14:14,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:14:14,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:14:14,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:14:14,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:14:14,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:14:14,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:14:14,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:14:14,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:14:14,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:14:14,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:14:14,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:14:14,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:14:14,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:14:14,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:14:14,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:14:14,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:14:14,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:14:14,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:14:14,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:14:14,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:14:14,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:14:14,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:14:14,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:14:14,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:14:14,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:14:14,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:14:14,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:14:14,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:14:14,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:14:14,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:14:14,692 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 01:14:14,706 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:14:14,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:14:14,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:14:14,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:14:14,708 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:14:14,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:14:14,711 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:14:14,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:14:14,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:14:14,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:14:14,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:14:14,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:14:14,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:14:14,713 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:14:14,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:14:14,713 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:14:14,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:14:14,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:14:14,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:14:14,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:14:14,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:14:14,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:14:14,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:14:14,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:14:14,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:14:14,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:14:14,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:14:14,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:14:14,716 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 01:14:15,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:14:15,025 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:14:15,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:14:15,030 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:14:15,030 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:14:15,031 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu2.cil.c [2019-11-07 01:14:15,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5186786/f0c648710cce4ed49482e782bf7ef3ac/FLAG3f66a66c9 [2019-11-07 01:14:15,629 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:14:15,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu2.cil.c [2019-11-07 01:14:15,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5186786/f0c648710cce4ed49482e782bf7ef3ac/FLAG3f66a66c9 [2019-11-07 01:14:15,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5186786/f0c648710cce4ed49482e782bf7ef3ac [2019-11-07 01:14:15,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:14:15,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:14:15,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:14:15,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:14:15,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:14:15,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:15" (1/1) ... [2019-11-07 01:14:15,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acb9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:15, skipping insertion in model container [2019-11-07 01:14:15,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:15" (1/1) ... [2019-11-07 01:14:16,000 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:14:16,059 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:14:16,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:14:16,419 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:14:16,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:14:16,598 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:14:16,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16 WrapperNode [2019-11-07 01:14:16,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:14:16,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:14:16,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:14:16,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:14:16,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (1/1) ... [2019-11-07 01:14:16,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:14:16,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:14:16,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:14:16,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:14:16,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (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 01:14:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:14:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:14:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 01:14:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure read_data [2019-11-07 01:14:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2019-11-07 01:14:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure P_1 [2019-11-07 01:14:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure is_P_1_triggered [2019-11-07 01:14:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure P_2 [2019-11-07 01:14:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure is_P_2_triggered [2019-11-07 01:14:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure C_1 [2019-11-07 01:14:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure is_C_1_triggered [2019-11-07 01:14:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 01:14:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 01:14:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 01:14:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 01:14:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 01:14:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 01:14:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 01:14:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:14:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:14:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:14:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 01:14:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 01:14:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure read_data [2019-11-07 01:14:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2019-11-07 01:14:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure P_1 [2019-11-07 01:14:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure is_P_1_triggered [2019-11-07 01:14:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure P_2 [2019-11-07 01:14:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure is_P_2_triggered [2019-11-07 01:14:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure C_1 [2019-11-07 01:14:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure is_C_1_triggered [2019-11-07 01:14:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 01:14:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 01:14:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 01:14:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 01:14:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 01:14:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 01:14:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 01:14:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 01:14:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 01:14:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 01:14:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 01:14:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 01:14:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:14:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:14:16,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:14:17,358 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:14:17,358 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:14:17,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:17 BoogieIcfgContainer [2019-11-07 01:14:17,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:14:17,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:14:17,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:14:17,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:14:17,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:14:15" (1/3) ... [2019-11-07 01:14:17,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ea1600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:17, skipping insertion in model container [2019-11-07 01:14:17,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:16" (2/3) ... [2019-11-07 01:14:17,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ea1600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:17, skipping insertion in model container [2019-11-07 01:14:17,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:17" (3/3) ... [2019-11-07 01:14:17,369 INFO L109 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2019-11-07 01:14:17,383 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:14:17,404 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:14:17,416 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:14:17,453 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:14:17,454 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:14:17,454 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:14:17,454 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:14:17,455 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:14:17,456 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:14:17,456 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:14:17,456 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:14:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2019-11-07 01:14:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-07 01:14:17,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:17,509 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] [2019-11-07 01:14:17,511 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1619619400, now seen corresponding path program 1 times [2019-11-07 01:14:17,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:17,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464959640] [2019-11-07 01:14:17,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:17,866 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 01:14:17,867 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464959640] [2019-11-07 01:14:17,868 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:17,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:17,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892181543] [2019-11-07 01:14:17,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:17,878 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:17,897 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 4 states. [2019-11-07 01:14:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:18,332 INFO L93 Difference]: Finished difference Result 493 states and 700 transitions. [2019-11-07 01:14:18,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:18,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2019-11-07 01:14:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:18,350 INFO L225 Difference]: With dead ends: 493 [2019-11-07 01:14:18,350 INFO L226 Difference]: Without dead ends: 319 [2019-11-07 01:14:18,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:14:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-07 01:14:18,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 312. [2019-11-07 01:14:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2019-11-07 01:14:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 410 transitions. [2019-11-07 01:14:18,439 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 410 transitions. Word has length 82 [2019-11-07 01:14:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:18,440 INFO L462 AbstractCegarLoop]: Abstraction has 312 states and 410 transitions. [2019-11-07 01:14:18,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 410 transitions. [2019-11-07 01:14:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-07 01:14:18,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:18,445 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] [2019-11-07 01:14:18,445 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1801870201, now seen corresponding path program 1 times [2019-11-07 01:14:18,446 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:18,446 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553346041] [2019-11-07 01:14:18,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:18,614 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 01:14:18,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553346041] [2019-11-07 01:14:18,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:18,615 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:18,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363504978] [2019-11-07 01:14:18,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:18,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:18,619 INFO L87 Difference]: Start difference. First operand 312 states and 410 transitions. Second operand 4 states. [2019-11-07 01:14:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:18,975 INFO L93 Difference]: Finished difference Result 881 states and 1195 transitions. [2019-11-07 01:14:18,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:18,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2019-11-07 01:14:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:18,983 INFO L225 Difference]: With dead ends: 881 [2019-11-07 01:14:18,983 INFO L226 Difference]: Without dead ends: 590 [2019-11-07 01:14:18,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 01:14:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-07 01:14:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 565. [2019-11-07 01:14:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 565 states. [2019-11-07 01:14:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 735 transitions. [2019-11-07 01:14:19,097 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 735 transitions. Word has length 82 [2019-11-07 01:14:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:19,099 INFO L462 AbstractCegarLoop]: Abstraction has 565 states and 735 transitions. [2019-11-07 01:14:19,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 735 transitions. [2019-11-07 01:14:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-07 01:14:19,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:19,107 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] [2019-11-07 01:14:19,107 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1148563485, now seen corresponding path program 1 times [2019-11-07 01:14:19,109 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:19,110 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891069981] [2019-11-07 01:14:19,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:19,328 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 01:14:19,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891069981] [2019-11-07 01:14:19,329 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:19,329 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:14:19,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728763988] [2019-11-07 01:14:19,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:14:19,330 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:14:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:19,331 INFO L87 Difference]: Start difference. First operand 565 states and 735 transitions. Second operand 6 states. [2019-11-07 01:14:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:19,406 INFO L93 Difference]: Finished difference Result 1129 states and 1502 transitions. [2019-11-07 01:14:19,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:14:19,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2019-11-07 01:14:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:19,412 INFO L225 Difference]: With dead ends: 1129 [2019-11-07 01:14:19,412 INFO L226 Difference]: Without dead ends: 585 [2019-11-07 01:14:19,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2019-11-07 01:14:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 575. [2019-11-07 01:14:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2019-11-07 01:14:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 743 transitions. [2019-11-07 01:14:19,466 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 743 transitions. Word has length 83 [2019-11-07 01:14:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:19,467 INFO L462 AbstractCegarLoop]: Abstraction has 575 states and 743 transitions. [2019-11-07 01:14:19,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:14:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 743 transitions. [2019-11-07 01:14:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-07 01:14:19,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:19,471 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] [2019-11-07 01:14:19,472 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash -223243813, now seen corresponding path program 1 times [2019-11-07 01:14:19,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:19,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664702990] [2019-11-07 01:14:19,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:19,631 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 01:14:19,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664702990] [2019-11-07 01:14:19,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:19,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:14:19,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924532047] [2019-11-07 01:14:19,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:14:19,633 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:14:19,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:19,634 INFO L87 Difference]: Start difference. First operand 575 states and 743 transitions. Second operand 6 states. [2019-11-07 01:14:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:19,789 INFO L93 Difference]: Finished difference Result 1504 states and 1996 transitions. [2019-11-07 01:14:19,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:14:19,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2019-11-07 01:14:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:19,798 INFO L225 Difference]: With dead ends: 1504 [2019-11-07 01:14:19,798 INFO L226 Difference]: Without dead ends: 951 [2019-11-07 01:14:19,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2019-11-07 01:14:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2019-11-07 01:14:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2019-11-07 01:14:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1213 transitions. [2019-11-07 01:14:19,862 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1213 transitions. Word has length 83 [2019-11-07 01:14:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:19,862 INFO L462 AbstractCegarLoop]: Abstraction has 927 states and 1213 transitions. [2019-11-07 01:14:19,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:14:19,863 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1213 transitions. [2019-11-07 01:14:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 01:14:19,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:19,865 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:19,865 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1894736262, now seen corresponding path program 1 times [2019-11-07 01:14:19,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:19,866 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356391379] [2019-11-07 01:14:19,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:20,063 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356391379] [2019-11-07 01:14:20,063 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:20,063 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 01:14:20,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043974221] [2019-11-07 01:14:20,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 01:14:20,064 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:20,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 01:14:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:20,065 INFO L87 Difference]: Start difference. First operand 927 states and 1213 transitions. Second operand 8 states. [2019-11-07 01:14:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:22,050 INFO L93 Difference]: Finished difference Result 2914 states and 4213 transitions. [2019-11-07 01:14:22,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-07 01:14:22,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2019-11-07 01:14:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:22,075 INFO L225 Difference]: With dead ends: 2914 [2019-11-07 01:14:22,075 INFO L226 Difference]: Without dead ends: 2131 [2019-11-07 01:14:22,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-11-07 01:14:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2019-11-07 01:14:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2014. [2019-11-07 01:14:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2014 states. [2019-11-07 01:14:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 2850 transitions. [2019-11-07 01:14:22,332 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 2850 transitions. Word has length 96 [2019-11-07 01:14:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:22,332 INFO L462 AbstractCegarLoop]: Abstraction has 2014 states and 2850 transitions. [2019-11-07 01:14:22,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 01:14:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 2850 transitions. [2019-11-07 01:14:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:14:22,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:22,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:22,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1165049387, now seen corresponding path program 1 times [2019-11-07 01:14:22,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:22,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968104255] [2019-11-07 01:14:22,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:22,556 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 01:14:22,557 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968104255] [2019-11-07 01:14:22,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:22,558 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-07 01:14:22,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094548256] [2019-11-07 01:14:22,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-07 01:14:22,559 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-07 01:14:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:22,560 INFO L87 Difference]: Start difference. First operand 2014 states and 2850 transitions. Second operand 9 states. [2019-11-07 01:14:24,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:24,793 INFO L93 Difference]: Finished difference Result 2322 states and 3502 transitions. [2019-11-07 01:14:24,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:14:24,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 101 [2019-11-07 01:14:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:24,821 INFO L225 Difference]: With dead ends: 2322 [2019-11-07 01:14:24,821 INFO L226 Difference]: Without dead ends: 2319 [2019-11-07 01:14:24,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:14:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2019-11-07 01:14:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2118. [2019-11-07 01:14:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2118 states. [2019-11-07 01:14:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 3079 transitions. [2019-11-07 01:14:25,024 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 3079 transitions. Word has length 101 [2019-11-07 01:14:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:25,026 INFO L462 AbstractCegarLoop]: Abstraction has 2118 states and 3079 transitions. [2019-11-07 01:14:25,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-07 01:14:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 3079 transitions. [2019-11-07 01:14:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:14:25,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:25,031 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:25,031 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1774230569, now seen corresponding path program 1 times [2019-11-07 01:14:25,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:25,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62277600] [2019-11-07 01:14:25,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:14:25,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62277600] [2019-11-07 01:14:25,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323748472] [2019-11-07 01:14:25,095 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 01:14:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:25,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:25,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:14:25,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:14:25,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:25,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2019-11-07 01:14:25,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719735661] [2019-11-07 01:14:25,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:25,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:25,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:14:25,434 INFO L87 Difference]: Start difference. First operand 2118 states and 3079 transitions. Second operand 3 states. [2019-11-07 01:14:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:25,677 INFO L93 Difference]: Finished difference Result 6100 states and 9810 transitions. [2019-11-07 01:14:25,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:25,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2019-11-07 01:14:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:25,711 INFO L225 Difference]: With dead ends: 6100 [2019-11-07 01:14:25,712 INFO L226 Difference]: Without dead ends: 4004 [2019-11-07 01:14:25,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:14:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2019-11-07 01:14:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 3999. [2019-11-07 01:14:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3999 states. [2019-11-07 01:14:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 6242 transitions. [2019-11-07 01:14:26,112 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 6242 transitions. Word has length 104 [2019-11-07 01:14:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:26,112 INFO L462 AbstractCegarLoop]: Abstraction has 3999 states and 6242 transitions. [2019-11-07 01:14:26,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 6242 transitions. [2019-11-07 01:14:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-07 01:14:26,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:26,118 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:14:26,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:26,323 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:26,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:26,323 INFO L82 PathProgramCache]: Analyzing trace with hash 535357227, now seen corresponding path program 1 times [2019-11-07 01:14:26,323 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:26,324 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788645753] [2019-11-07 01:14:26,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:14:26,395 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788645753] [2019-11-07 01:14:26,396 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300396465] [2019-11-07 01:14:26,396 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 01:14:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:26,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:26,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:26,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:14:26,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:26,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-07 01:14:26,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702340386] [2019-11-07 01:14:26,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:26,634 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:26,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:26,635 INFO L87 Difference]: Start difference. First operand 3999 states and 6242 transitions. Second operand 4 states. [2019-11-07 01:14:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:27,369 INFO L93 Difference]: Finished difference Result 11251 states and 19542 transitions. [2019-11-07 01:14:27,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:27,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2019-11-07 01:14:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:27,458 INFO L225 Difference]: With dead ends: 11251 [2019-11-07 01:14:27,458 INFO L226 Difference]: Without dead ends: 7281 [2019-11-07 01:14:27,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2019-11-07 01:14:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 7276. [2019-11-07 01:14:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7276 states. [2019-11-07 01:14:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7276 states to 7276 states and 11676 transitions. [2019-11-07 01:14:28,328 INFO L78 Accepts]: Start accepts. Automaton has 7276 states and 11676 transitions. Word has length 106 [2019-11-07 01:14:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:28,331 INFO L462 AbstractCegarLoop]: Abstraction has 7276 states and 11676 transitions. [2019-11-07 01:14:28,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7276 states and 11676 transitions. [2019-11-07 01:14:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-07 01:14:28,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:28,344 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:28,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:28,558 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1679546114, now seen corresponding path program 1 times [2019-11-07 01:14:28,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:28,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188251954] [2019-11-07 01:14:28,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:14:28,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188251954] [2019-11-07 01:14:28,636 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:28,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:28,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202321401] [2019-11-07 01:14:28,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:28,638 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:28,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:28,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:28,639 INFO L87 Difference]: Start difference. First operand 7276 states and 11676 transitions. Second operand 4 states. [2019-11-07 01:14:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:29,420 INFO L93 Difference]: Finished difference Result 14515 states and 23294 transitions. [2019-11-07 01:14:29,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:29,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-11-07 01:14:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:29,506 INFO L225 Difference]: With dead ends: 14515 [2019-11-07 01:14:29,506 INFO L226 Difference]: Without dead ends: 7264 [2019-11-07 01:14:29,548 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 01:14:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7264 states. [2019-11-07 01:14:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7264 to 7264. [2019-11-07 01:14:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7264 states. [2019-11-07 01:14:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7264 states to 7264 states and 11651 transitions. [2019-11-07 01:14:30,174 INFO L78 Accepts]: Start accepts. Automaton has 7264 states and 11651 transitions. Word has length 112 [2019-11-07 01:14:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:30,174 INFO L462 AbstractCegarLoop]: Abstraction has 7264 states and 11651 transitions. [2019-11-07 01:14:30,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7264 states and 11651 transitions. [2019-11-07 01:14:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-07 01:14:30,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:30,180 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:30,181 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash -719656318, now seen corresponding path program 1 times [2019-11-07 01:14:30,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:30,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569673859] [2019-11-07 01:14:30,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:14:30,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569673859] [2019-11-07 01:14:30,320 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:30,321 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-07 01:14:30,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819377028] [2019-11-07 01:14:30,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-07 01:14:30,322 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:30,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-07 01:14:30,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:30,323 INFO L87 Difference]: Start difference. First operand 7264 states and 11651 transitions. Second operand 7 states. [2019-11-07 01:14:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:31,614 INFO L93 Difference]: Finished difference Result 18690 states and 31816 transitions. [2019-11-07 01:14:31,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:14:31,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2019-11-07 01:14:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:31,692 INFO L225 Difference]: With dead ends: 18690 [2019-11-07 01:14:31,693 INFO L226 Difference]: Without dead ends: 11807 [2019-11-07 01:14:31,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:14:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11807 states. [2019-11-07 01:14:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11807 to 11665. [2019-11-07 01:14:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11665 states. [2019-11-07 01:14:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11665 states to 11665 states and 18163 transitions. [2019-11-07 01:14:33,329 INFO L78 Accepts]: Start accepts. Automaton has 11665 states and 18163 transitions. Word has length 112 [2019-11-07 01:14:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:33,329 INFO L462 AbstractCegarLoop]: Abstraction has 11665 states and 18163 transitions. [2019-11-07 01:14:33,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-07 01:14:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11665 states and 18163 transitions. [2019-11-07 01:14:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-07 01:14:33,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:33,335 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:33,335 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1217934684, now seen corresponding path program 1 times [2019-11-07 01:14:33,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:33,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869220383] [2019-11-07 01:14:33,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:14:33,461 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869220383] [2019-11-07 01:14:33,461 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:33,461 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 01:14:33,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846467221] [2019-11-07 01:14:33,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 01:14:33,462 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 01:14:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:33,463 INFO L87 Difference]: Start difference. First operand 11665 states and 18163 transitions. Second operand 8 states. [2019-11-07 01:14:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:34,746 INFO L93 Difference]: Finished difference Result 26321 states and 42898 transitions. [2019-11-07 01:14:34,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 01:14:34,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2019-11-07 01:14:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:34,838 INFO L225 Difference]: With dead ends: 26321 [2019-11-07 01:14:34,838 INFO L226 Difference]: Without dead ends: 12925 [2019-11-07 01:14:34,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-07 01:14:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12925 states. [2019-11-07 01:14:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12925 to 12705. [2019-11-07 01:14:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12705 states. [2019-11-07 01:14:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12705 states to 12705 states and 20517 transitions. [2019-11-07 01:14:35,890 INFO L78 Accepts]: Start accepts. Automaton has 12705 states and 20517 transitions. Word has length 116 [2019-11-07 01:14:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:35,892 INFO L462 AbstractCegarLoop]: Abstraction has 12705 states and 20517 transitions. [2019-11-07 01:14:35,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 01:14:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 12705 states and 20517 transitions. [2019-11-07 01:14:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:14:35,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:35,901 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-07 01:14:35,901 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1456232897, now seen corresponding path program 1 times [2019-11-07 01:14:35,902 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:35,902 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221462311] [2019-11-07 01:14:35,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:14:36,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221462311] [2019-11-07 01:14:36,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176547736] [2019-11-07 01:14:36,009 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 01:14:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:36,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:36,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:14:36,169 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:14:36,256 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:36,256 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 4] total 11 [2019-11-07 01:14:36,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085059492] [2019-11-07 01:14:36,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:36,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:14:36,258 INFO L87 Difference]: Start difference. First operand 12705 states and 20517 transitions. Second operand 3 states. [2019-11-07 01:14:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:36,906 INFO L93 Difference]: Finished difference Result 25098 states and 42951 transitions. [2019-11-07 01:14:36,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:36,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-07 01:14:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:36,987 INFO L225 Difference]: With dead ends: 25098 [2019-11-07 01:14:36,987 INFO L226 Difference]: Without dead ends: 12420 [2019-11-07 01:14:37,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:14:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12420 states. [2019-11-07 01:14:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12420 to 12414. [2019-11-07 01:14:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12414 states. [2019-11-07 01:14:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12414 states to 12414 states and 18928 transitions. [2019-11-07 01:14:37,915 INFO L78 Accepts]: Start accepts. Automaton has 12414 states and 18928 transitions. Word has length 121 [2019-11-07 01:14:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:37,915 INFO L462 AbstractCegarLoop]: Abstraction has 12414 states and 18928 transitions. [2019-11-07 01:14:37,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 12414 states and 18928 transitions. [2019-11-07 01:14:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 01:14:37,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:37,922 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:38,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:38,130 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:38,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1440725386, now seen corresponding path program 1 times [2019-11-07 01:14:38,131 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:38,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911320845] [2019-11-07 01:14:38,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:14:38,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911320845] [2019-11-07 01:14:38,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:38,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 01:14:38,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053906295] [2019-11-07 01:14:38,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 01:14:38,253 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:38,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 01:14:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:38,254 INFO L87 Difference]: Start difference. First operand 12414 states and 18928 transitions. Second operand 8 states. [2019-11-07 01:14:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:42,559 INFO L93 Difference]: Finished difference Result 48202 states and 84998 transitions. [2019-11-07 01:14:42,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:14:42,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-11-07 01:14:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:42,796 INFO L225 Difference]: With dead ends: 48202 [2019-11-07 01:14:42,796 INFO L226 Difference]: Without dead ends: 34108 [2019-11-07 01:14:42,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2019-11-07 01:14:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34108 states. [2019-11-07 01:14:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34108 to 32598. [2019-11-07 01:14:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32598 states. [2019-11-07 01:14:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32598 states to 32598 states and 54458 transitions. [2019-11-07 01:14:44,903 INFO L78 Accepts]: Start accepts. Automaton has 32598 states and 54458 transitions. Word has length 125 [2019-11-07 01:14:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:44,904 INFO L462 AbstractCegarLoop]: Abstraction has 32598 states and 54458 transitions. [2019-11-07 01:14:44,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 01:14:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32598 states and 54458 transitions. [2019-11-07 01:14:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-07 01:14:44,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:44,913 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:44,913 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 109681911, now seen corresponding path program 1 times [2019-11-07 01:14:44,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:44,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641924578] [2019-11-07 01:14:44,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:14:45,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641924578] [2019-11-07 01:14:45,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641833700] [2019-11-07 01:14:45,011 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 01:14:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:45,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:45,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:45,190 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:14:45,268 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:45,268 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-07 01:14:45,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034325488] [2019-11-07 01:14:45,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:45,269 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:45,274 INFO L87 Difference]: Start difference. First operand 32598 states and 54458 transitions. Second operand 4 states.