java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.03.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:59,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:59,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:59,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:59,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:59,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:59,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:59,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:59,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:59,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:59,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:59,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:59,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:59,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:59,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:59,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:59,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:59,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:59,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:59,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:59,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:59,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:59,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:59,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:59,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:31:59,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:31:59,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:31:59,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:31:59,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:31:59,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:31:59,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:59,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:59,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:59,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:59,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:59,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:59,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:59,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:59,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:59,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:59,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:59,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:31:59,135 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:59,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:59,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:59,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:59,140 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:59,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:59,141 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:59,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:59,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:59,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:59,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:59,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:59,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:59,143 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:59,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:59,144 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:59,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:59,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:59,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:59,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:59,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:59,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:59,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:59,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:59,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:59,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:59,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:59,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:59,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:31:59,430 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:59,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:59,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:59,448 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:59,449 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:59,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.03.cil-2.c [2019-10-15 03:31:59,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d2b52d4/83d6b7e212664d01952cff34305692d0/FLAG6d575ed8c [2019-10-15 03:32:00,015 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:32:00,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.03.cil-2.c [2019-10-15 03:32:00,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d2b52d4/83d6b7e212664d01952cff34305692d0/FLAG6d575ed8c [2019-10-15 03:32:00,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d2b52d4/83d6b7e212664d01952cff34305692d0 [2019-10-15 03:32:00,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:32:00,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:32:00,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:00,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:32:00,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:32:00,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6608a0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00, skipping insertion in model container [2019-10-15 03:32:00,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,383 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:32:00,432 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:32:00,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:00,704 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:32:00,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:32:00,878 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:32:00,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00 WrapperNode [2019-10-15 03:32:00,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:32:00,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:32:00,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:32:00,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:32:00,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... [2019-10-15 03:32:00,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:32:00,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:32:00,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:32:00,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:32:00,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:32:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:32:01,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:32:01,006 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:32:01,006 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:32:01,006 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:32:01,007 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:32:01,008 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-15 03:32:01,008 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:32:01,008 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:32:01,008 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:32:01,008 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-15 03:32:01,009 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:32:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:32:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:32:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:32:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:32:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:32:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:32:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:32:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:32:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:32:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:32:01,014 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:32:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:32:01,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:32:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:32:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:32:01,015 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:32:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:32:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:32:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-15 03:32:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:32:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:32:01,016 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:32:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:32:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:32:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-15 03:32:01,017 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:32:01,018 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:32:01,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:32:02,170 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:32:02,171 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 03:32:02,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:02 BoogieIcfgContainer [2019-10-15 03:32:02,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:32:02,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:32:02,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:32:02,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:32:02,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:32:00" (1/3) ... [2019-10-15 03:32:02,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e7372c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:02, skipping insertion in model container [2019-10-15 03:32:02,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:32:00" (2/3) ... [2019-10-15 03:32:02,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e7372c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:32:02, skipping insertion in model container [2019-10-15 03:32:02,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:32:02" (3/3) ... [2019-10-15 03:32:02,183 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2019-10-15 03:32:02,194 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:32:02,205 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:32:02,219 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:32:02,249 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:32:02,249 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:32:02,249 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:32:02,249 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:32:02,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:32:02,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:32:02,250 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:32:02,250 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:32:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2019-10-15 03:32:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-15 03:32:02,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:02,294 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:02,297 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1525413467, now seen corresponding path program 1 times [2019-10-15 03:32:02,313 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:02,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346469061] [2019-10-15 03:32:02,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:02,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:02,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:32:02,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346469061] [2019-10-15 03:32:02,737 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:02,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:32:02,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891487945] [2019-10-15 03:32:02,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:02,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:02,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:02,764 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 3 states. [2019-10-15 03:32:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:02,935 INFO L93 Difference]: Finished difference Result 384 states and 529 transitions. [2019-10-15 03:32:02,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:02,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-10-15 03:32:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:02,969 INFO L225 Difference]: With dead ends: 384 [2019-10-15 03:32:02,970 INFO L226 Difference]: Without dead ends: 246 [2019-10-15 03:32:02,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:32:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-10-15 03:32:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2019-10-15 03:32:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-10-15 03:32:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 326 transitions. [2019-10-15 03:32:03,110 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 326 transitions. Word has length 70 [2019-10-15 03:32:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:03,111 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 326 transitions. [2019-10-15 03:32:03,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 326 transitions. [2019-10-15 03:32:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-15 03:32:03,118 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:03,119 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:03,119 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash 792150009, now seen corresponding path program 1 times [2019-10-15 03:32:03,120 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717073588] [2019-10-15 03:32:03,120 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 03:32:03,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717073588] [2019-10-15 03:32:03,289 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:32:03,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:32:03,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948165232] [2019-10-15 03:32:03,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:03,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:03,299 INFO L87 Difference]: Start difference. First operand 245 states and 326 transitions. Second operand 4 states. [2019-10-15 03:32:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:03,487 INFO L93 Difference]: Finished difference Result 632 states and 884 transitions. [2019-10-15 03:32:03,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:03,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-15 03:32:03,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:03,502 INFO L225 Difference]: With dead ends: 632 [2019-10-15 03:32:03,502 INFO L226 Difference]: Without dead ends: 404 [2019-10-15 03:32:03,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:32:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-10-15 03:32:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 365. [2019-10-15 03:32:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-10-15 03:32:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 514 transitions. [2019-10-15 03:32:03,576 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 514 transitions. Word has length 121 [2019-10-15 03:32:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:03,577 INFO L462 AbstractCegarLoop]: Abstraction has 365 states and 514 transitions. [2019-10-15 03:32:03,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 514 transitions. [2019-10-15 03:32:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 03:32:03,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:03,589 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:03,589 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2121133127, now seen corresponding path program 1 times [2019-10-15 03:32:03,590 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242805956] [2019-10-15 03:32:03,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-15 03:32:03,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242805956] [2019-10-15 03:32:03,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594427185] [2019-10-15 03:32:03,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:04,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 03:32:04,073 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-15 03:32:04,347 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:04,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:04,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408538999] [2019-10-15 03:32:04,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:04,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:04,350 INFO L87 Difference]: Start difference. First operand 365 states and 514 transitions. Second operand 4 states. [2019-10-15 03:32:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:04,636 INFO L93 Difference]: Finished difference Result 1047 states and 1617 transitions. [2019-10-15 03:32:04,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:04,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 03:32:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:04,644 INFO L225 Difference]: With dead ends: 1047 [2019-10-15 03:32:04,644 INFO L226 Difference]: Without dead ends: 698 [2019-10-15 03:32:04,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2019-10-15 03:32:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 677. [2019-10-15 03:32:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2019-10-15 03:32:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 944 transitions. [2019-10-15 03:32:04,721 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 944 transitions. Word has length 162 [2019-10-15 03:32:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:04,723 INFO L462 AbstractCegarLoop]: Abstraction has 677 states and 944 transitions. [2019-10-15 03:32:04,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 944 transitions. [2019-10-15 03:32:04,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 03:32:04,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:04,736 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:04,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:04,951 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1593060905, now seen corresponding path program 1 times [2019-10-15 03:32:04,952 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:04,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773673958] [2019-10-15 03:32:04,953 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:04,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:04,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-15 03:32:05,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773673958] [2019-10-15 03:32:05,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543142488] [2019-10-15 03:32:05,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:05,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 03:32:05,335 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 03:32:05,605 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:05,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:05,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693762468] [2019-10-15 03:32:05,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:05,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:05,608 INFO L87 Difference]: Start difference. First operand 677 states and 944 transitions. Second operand 4 states. [2019-10-15 03:32:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:05,933 INFO L93 Difference]: Finished difference Result 1968 states and 3001 transitions. [2019-10-15 03:32:05,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:05,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 03:32:05,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:05,949 INFO L225 Difference]: With dead ends: 1968 [2019-10-15 03:32:05,949 INFO L226 Difference]: Without dead ends: 1307 [2019-10-15 03:32:05,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2019-10-15 03:32:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1278. [2019-10-15 03:32:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2019-10-15 03:32:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1760 transitions. [2019-10-15 03:32:06,063 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1760 transitions. Word has length 162 [2019-10-15 03:32:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:06,063 INFO L462 AbstractCegarLoop]: Abstraction has 1278 states and 1760 transitions. [2019-10-15 03:32:06,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1760 transitions. [2019-10-15 03:32:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-15 03:32:06,069 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:06,070 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:06,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:06,277 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2050703469, now seen corresponding path program 1 times [2019-10-15 03:32:06,278 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:06,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902950077] [2019-10-15 03:32:06,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:06,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-15 03:32:06,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902950077] [2019-10-15 03:32:06,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532333325] [2019-10-15 03:32:06,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:06,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:06,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 03:32:06,616 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 03:32:06,791 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:06,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:32:06,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925884337] [2019-10-15 03:32:06,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:06,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:06,794 INFO L87 Difference]: Start difference. First operand 1278 states and 1760 transitions. Second operand 4 states. [2019-10-15 03:32:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:07,162 INFO L93 Difference]: Finished difference Result 3740 states and 5633 transitions. [2019-10-15 03:32:07,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:07,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-10-15 03:32:07,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:07,183 INFO L225 Difference]: With dead ends: 3740 [2019-10-15 03:32:07,184 INFO L226 Difference]: Without dead ends: 2478 [2019-10-15 03:32:07,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:32:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-10-15 03:32:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2433. [2019-10-15 03:32:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2019-10-15 03:32:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3310 transitions. [2019-10-15 03:32:07,519 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3310 transitions. Word has length 162 [2019-10-15 03:32:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:07,522 INFO L462 AbstractCegarLoop]: Abstraction has 2433 states and 3310 transitions. [2019-10-15 03:32:07,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3310 transitions. [2019-10-15 03:32:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 03:32:07,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:07,539 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:07,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:07,744 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:07,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1445260331, now seen corresponding path program 1 times [2019-10-15 03:32:07,745 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:07,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752784326] [2019-10-15 03:32:07,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:07,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:07,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-15 03:32:07,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752784326] [2019-10-15 03:32:07,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961153848] [2019-10-15 03:32:07,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:08,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:08,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 03:32:08,223 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-15 03:32:08,492 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:08,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:32:08,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244877843] [2019-10-15 03:32:08,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:08,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:08,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:08,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:08,496 INFO L87 Difference]: Start difference. First operand 2433 states and 3310 transitions. Second operand 3 states. [2019-10-15 03:32:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:08,708 INFO L93 Difference]: Finished difference Result 4518 states and 6297 transitions. [2019-10-15 03:32:08,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:08,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-15 03:32:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:08,736 INFO L225 Difference]: With dead ends: 4518 [2019-10-15 03:32:08,736 INFO L226 Difference]: Without dead ends: 3315 [2019-10-15 03:32:08,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2019-10-15 03:32:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 2793. [2019-10-15 03:32:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2793 states. [2019-10-15 03:32:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3820 transitions. [2019-10-15 03:32:08,982 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3820 transitions. Word has length 177 [2019-10-15 03:32:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:08,983 INFO L462 AbstractCegarLoop]: Abstraction has 2793 states and 3820 transitions. [2019-10-15 03:32:08,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3820 transitions. [2019-10-15 03:32:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-15 03:32:08,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:08,997 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:09,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:09,202 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:09,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1912388343, now seen corresponding path program 1 times [2019-10-15 03:32:09,202 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:09,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586434671] [2019-10-15 03:32:09,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:09,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:09,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-15 03:32:09,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586434671] [2019-10-15 03:32:09,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857296809] [2019-10-15 03:32:09,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:09,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:09,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 03:32:09,586 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-15 03:32:09,812 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:09,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:32:09,812 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368728096] [2019-10-15 03:32:09,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:09,815 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:09,815 INFO L87 Difference]: Start difference. First operand 2793 states and 3820 transitions. Second operand 3 states. [2019-10-15 03:32:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:09,995 INFO L93 Difference]: Finished difference Result 5114 states and 7175 transitions. [2019-10-15 03:32:09,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:09,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-15 03:32:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:10,022 INFO L225 Difference]: With dead ends: 5114 [2019-10-15 03:32:10,023 INFO L226 Difference]: Without dead ends: 3758 [2019-10-15 03:32:10,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2019-10-15 03:32:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3296. [2019-10-15 03:32:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3296 states. [2019-10-15 03:32:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 4520 transitions. [2019-10-15 03:32:10,292 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 4520 transitions. Word has length 177 [2019-10-15 03:32:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:10,292 INFO L462 AbstractCegarLoop]: Abstraction has 3296 states and 4520 transitions. [2019-10-15 03:32:10,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 4520 transitions. [2019-10-15 03:32:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-15 03:32:10,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:10,309 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-15 03:32:10,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:10,517 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1945516746, now seen corresponding path program 1 times [2019-10-15 03:32:10,518 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:10,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018042256] [2019-10-15 03:32:10,518 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:10,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:10,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-15 03:32:10,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018042256] [2019-10-15 03:32:10,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315517036] [2019-10-15 03:32:10,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:11,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 1344 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:11,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-10-15 03:32:11,139 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-10-15 03:32:11,371 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:11,371 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [7] total 9 [2019-10-15 03:32:11,371 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907143385] [2019-10-15 03:32:11,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:11,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:32:11,373 INFO L87 Difference]: Start difference. First operand 3296 states and 4520 transitions. Second operand 4 states. [2019-10-15 03:32:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:11,719 INFO L93 Difference]: Finished difference Result 5418 states and 7528 transitions. [2019-10-15 03:32:11,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:11,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2019-10-15 03:32:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:11,748 INFO L225 Difference]: With dead ends: 5418 [2019-10-15 03:32:11,748 INFO L226 Difference]: Without dead ends: 3850 [2019-10-15 03:32:11,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 486 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:32:11,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2019-10-15 03:32:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3850. [2019-10-15 03:32:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3850 states. [2019-10-15 03:32:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 5105 transitions. [2019-10-15 03:32:12,160 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 5105 transitions. Word has length 244 [2019-10-15 03:32:12,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:12,161 INFO L462 AbstractCegarLoop]: Abstraction has 3850 states and 5105 transitions. [2019-10-15 03:32:12,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 5105 transitions. [2019-10-15 03:32:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 03:32:12,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:12,185 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:12,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:12,400 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:12,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:12,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1974641983, now seen corresponding path program 1 times [2019-10-15 03:32:12,401 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:12,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104365236] [2019-10-15 03:32:12,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:12,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:12,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-15 03:32:12,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104365236] [2019-10-15 03:32:12,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135154928] [2019-10-15 03:32:12,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:12,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:12,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 03:32:12,975 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:13,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:13,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:13,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:13,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-15 03:32:13,333 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:13,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7] total 18 [2019-10-15 03:32:13,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555695532] [2019-10-15 03:32:13,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 03:32:13,337 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:13,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 03:32:13,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:32:13,338 INFO L87 Difference]: Start difference. First operand 3850 states and 5105 transitions. Second operand 9 states. [2019-10-15 03:32:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:14,648 INFO L93 Difference]: Finished difference Result 10772 states and 15581 transitions. [2019-10-15 03:32:14,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:32:14,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-15 03:32:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:14,698 INFO L225 Difference]: With dead ends: 10772 [2019-10-15 03:32:14,698 INFO L226 Difference]: Without dead ends: 6939 [2019-10-15 03:32:14,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 350 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2019-10-15 03:32:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6939 states. [2019-10-15 03:32:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6939 to 6756. [2019-10-15 03:32:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6756 states. [2019-10-15 03:32:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6756 states to 6756 states and 9531 transitions. [2019-10-15 03:32:15,285 INFO L78 Accepts]: Start accepts. Automaton has 6756 states and 9531 transitions. Word has length 178 [2019-10-15 03:32:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:15,287 INFO L462 AbstractCegarLoop]: Abstraction has 6756 states and 9531 transitions. [2019-10-15 03:32:15,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 03:32:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6756 states and 9531 transitions. [2019-10-15 03:32:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-15 03:32:15,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:15,329 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:15,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:15,536 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:15,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2043125902, now seen corresponding path program 1 times [2019-10-15 03:32:15,537 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:15,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231195996] [2019-10-15 03:32:15,537 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:15,537 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:15,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2019-10-15 03:32:15,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231195996] [2019-10-15 03:32:15,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683238233] [2019-10-15 03:32:15,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:16,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:16,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 139 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-15 03:32:16,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:16,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:16,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:16,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:16,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-15 03:32:16,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960215841] [2019-10-15 03:32:16,684 INFO L162 IcfgInterpreter]: Started Sifa with 110 locations of interest [2019-10-15 03:32:16,684 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:32:16,696 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:32:16,704 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:32:16,705 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:32:17,080 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 67 for LOIs [2019-10-15 03:32:17,134 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 111 for LOIs [2019-10-15 03:32:17,558 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2019-10-15 03:32:18,043 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 67 for LOIs [2019-10-15 03:32:18,176 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 120 for LOIs [2019-10-15 03:32:19,511 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-15 03:32:21,781 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 03:32:21,817 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 03:32:23,261 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-10-15 03:32:23,304 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8