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/transmitter.03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:27:14,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:27:14,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:27:14,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:27:14,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:27:14,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:27:14,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:27:14,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:27:14,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:27:14,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:27:14,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:27:14,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:27:14,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:27:14,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:27:14,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:27:14,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:27:14,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:27:14,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:27:14,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:27:14,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:27:14,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:27:14,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:27:14,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:27:14,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:27:14,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 23:27:14,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 23:27:14,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 23:27:14,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 23:27:14,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 23:27:14,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 23:27:14,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:27:14,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:27:14,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:27:14,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:27:14,856 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:27:14,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:27:14,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:27:14,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:27:14,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:27:14,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:27:14,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:27:14,862 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 [2019-10-13 23:27:14,876 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:27:14,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:27:14,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:27:14,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:27:14,878 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:27:14,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:27:14,879 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:27:14,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:27:14,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:27:14,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:27:14,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:27:14,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:27:14,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:27:14,880 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:27:14,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:27:14,881 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:27:14,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:27:14,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:27:14,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:27:14,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:27:14,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:27:14,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:27:14,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:27:14,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:27:14,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:27:14,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:27:14,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:27:14,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:27:14,883 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 [2019-10-13 23:27:15,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:27:15,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:27:15,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:27:15,190 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:27:15,191 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:27:15,191 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.03.cil.c [2019-10-13 23:27:15,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a54e508/cb9931cf19a54a28981ae0d384da94dd/FLAG4168a6dac [2019-10-13 23:27:15,761 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:27:15,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.03.cil.c [2019-10-13 23:27:15,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a54e508/cb9931cf19a54a28981ae0d384da94dd/FLAG4168a6dac [2019-10-13 23:27:16,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a54e508/cb9931cf19a54a28981ae0d384da94dd [2019-10-13 23:27:16,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:27:16,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:27:16,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:16,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:27:16,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:27:16,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343aa16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16, skipping insertion in model container [2019-10-13 23:27:16,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,113 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:27:16,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:27:16,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:16,504 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:27:16,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:27:16,668 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:27:16,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16 WrapperNode [2019-10-13 23:27:16,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:27:16,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:27:16,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:27:16,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:27:16,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (1/1) ... [2019-10-13 23:27:16,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:27:16,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:27:16,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:27:16,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:27:16,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (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 [2019-10-13 23:27:16,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:27:16,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-13 23:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-13 23:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-13 23:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-13 23:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-13 23:27:16,804 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-13 23:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-13 23:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-13 23:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-13 23:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-13 23:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-13 23:27:16,805 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-13 23:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-13 23:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-13 23:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-13 23:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-13 23:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-13 23:27:16,806 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-13 23:27:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-13 23:27:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-13 23:27:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-13 23:27:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-13 23:27:16,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:27:16,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:27:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:27:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-13 23:27:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-13 23:27:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-13 23:27:16,808 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-13 23:27:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-13 23:27:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-13 23:27:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-13 23:27:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-13 23:27:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-13 23:27:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-13 23:27:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-13 23:27:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-13 23:27:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-13 23:27:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-13 23:27:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-13 23:27:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-13 23:27:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:27:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:27:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:27:17,872 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:27:17,873 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-13 23:27:17,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:17 BoogieIcfgContainer [2019-10-13 23:27:17,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:27:17,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:27:17,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:27:17,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:27:17,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:27:16" (1/3) ... [2019-10-13 23:27:17,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fd2c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:17, skipping insertion in model container [2019-10-13 23:27:17,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:27:16" (2/3) ... [2019-10-13 23:27:17,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fd2c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:27:17, skipping insertion in model container [2019-10-13 23:27:17,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:27:17" (3/3) ... [2019-10-13 23:27:17,884 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.03.cil.c [2019-10-13 23:27:17,916 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:27:17,926 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:27:17,938 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:27:17,966 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:27:17,966 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:27:17,966 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:27:17,967 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:27:17,967 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:27:17,967 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:27:17,967 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:27:17,968 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:27:17,992 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2019-10-13 23:27:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:27:18,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:18,005 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:18,007 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1794568052, now seen corresponding path program 1 times [2019-10-13 23:27:18,024 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:18,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024035110] [2019-10-13 23:27:18,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:18,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:18,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:18,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024035110] [2019-10-13 23:27:18,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:18,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:18,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951802125] [2019-10-13 23:27:18,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:18,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:18,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:18,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:18,394 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 4 states. [2019-10-13 23:27:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:18,786 INFO L93 Difference]: Finished difference Result 379 states and 517 transitions. [2019-10-13 23:27:18,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:18,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-13 23:27:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:18,806 INFO L225 Difference]: With dead ends: 379 [2019-10-13 23:27:18,806 INFO L226 Difference]: Without dead ends: 243 [2019-10-13 23:27:18,811 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-10-13 23:27:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2019-10-13 23:27:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-10-13 23:27:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 301 transitions. [2019-10-13 23:27:18,891 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 301 transitions. Word has length 72 [2019-10-13 23:27:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:18,892 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 301 transitions. [2019-10-13 23:27:18,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 301 transitions. [2019-10-13 23:27:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 23:27:18,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:18,897 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:18,897 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1032195915, now seen corresponding path program 1 times [2019-10-13 23:27:18,898 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:18,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139466233] [2019-10-13 23:27:18,899 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:18,899 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:18,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:27:19,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139466233] [2019-10-13 23:27:19,074 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:19,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:19,075 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645115462] [2019-10-13 23:27:19,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:19,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:19,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:19,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:19,084 INFO L87 Difference]: Start difference. First operand 239 states and 301 transitions. Second operand 3 states. [2019-10-13 23:27:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:19,181 INFO L93 Difference]: Finished difference Result 675 states and 904 transitions. [2019-10-13 23:27:19,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:19,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-13 23:27:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:19,190 INFO L225 Difference]: With dead ends: 675 [2019-10-13 23:27:19,190 INFO L226 Difference]: Without dead ends: 452 [2019-10-13 23:27:19,193 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 [2019-10-13 23:27:19,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-10-13 23:27:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2019-10-13 23:27:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2019-10-13 23:27:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 593 transitions. [2019-10-13 23:27:19,265 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 593 transitions. Word has length 72 [2019-10-13 23:27:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:19,266 INFO L462 AbstractCegarLoop]: Abstraction has 452 states and 593 transitions. [2019-10-13 23:27:19,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 593 transitions. [2019-10-13 23:27:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 23:27:19,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:19,272 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:19,272 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:19,272 INFO L82 PathProgramCache]: Analyzing trace with hash 364690172, now seen corresponding path program 1 times [2019-10-13 23:27:19,273 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:19,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982667994] [2019-10-13 23:27:19,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:19,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:19,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:27:19,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982667994] [2019-10-13 23:27:19,446 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:19,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:19,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946099780] [2019-10-13 23:27:19,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:19,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:19,448 INFO L87 Difference]: Start difference. First operand 452 states and 593 transitions. Second operand 4 states. [2019-10-13 23:27:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:19,614 INFO L93 Difference]: Finished difference Result 1343 states and 1827 transitions. [2019-10-13 23:27:19,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:19,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-13 23:27:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:19,624 INFO L225 Difference]: With dead ends: 1343 [2019-10-13 23:27:19,624 INFO L226 Difference]: Without dead ends: 908 [2019-10-13 23:27:19,627 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 [2019-10-13 23:27:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2019-10-13 23:27:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 720. [2019-10-13 23:27:19,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2019-10-13 23:27:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 986 transitions. [2019-10-13 23:27:19,734 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 986 transitions. Word has length 87 [2019-10-13 23:27:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:19,735 INFO L462 AbstractCegarLoop]: Abstraction has 720 states and 986 transitions. [2019-10-13 23:27:19,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 986 transitions. [2019-10-13 23:27:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 23:27:19,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:19,748 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:19,748 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1578447092, now seen corresponding path program 1 times [2019-10-13 23:27:19,749 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:19,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041699706] [2019-10-13 23:27:19,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:19,750 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:19,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 23:27:19,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041699706] [2019-10-13 23:27:19,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:19,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:19,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778560170] [2019-10-13 23:27:19,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:19,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:19,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:19,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:19,918 INFO L87 Difference]: Start difference. First operand 720 states and 986 transitions. Second operand 3 states. [2019-10-13 23:27:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:20,015 INFO L93 Difference]: Finished difference Result 1900 states and 2642 transitions. [2019-10-13 23:27:20,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:20,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-13 23:27:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:20,027 INFO L225 Difference]: With dead ends: 1900 [2019-10-13 23:27:20,027 INFO L226 Difference]: Without dead ends: 1197 [2019-10-13 23:27:20,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2019-10-13 23:27:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 940. [2019-10-13 23:27:20,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2019-10-13 23:27:20,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1308 transitions. [2019-10-13 23:27:20,139 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1308 transitions. Word has length 128 [2019-10-13 23:27:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:20,141 INFO L462 AbstractCegarLoop]: Abstraction has 940 states and 1308 transitions. [2019-10-13 23:27:20,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1308 transitions. [2019-10-13 23:27:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 23:27:20,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:20,148 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:20,148 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:20,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:20,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1812736208, now seen corresponding path program 1 times [2019-10-13 23:27:20,149 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:20,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24351992] [2019-10-13 23:27:20,150 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:20,150 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:20,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 23:27:20,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24351992] [2019-10-13 23:27:20,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014985645] [2019-10-13 23:27:20,330 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 [2019-10-13 23:27:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:20,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:20,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 23:27:20,540 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-13 23:27:20,734 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:20,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-13 23:27:20,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999375040] [2019-10-13 23:27:20,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:20,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:20,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:20,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:20,741 INFO L87 Difference]: Start difference. First operand 940 states and 1308 transitions. Second operand 4 states. [2019-10-13 23:27:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:21,108 INFO L93 Difference]: Finished difference Result 2755 states and 4105 transitions. [2019-10-13 23:27:21,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:21,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 23:27:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:21,124 INFO L225 Difference]: With dead ends: 2755 [2019-10-13 23:27:21,125 INFO L226 Difference]: Without dead ends: 1831 [2019-10-13 23:27:21,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2019-10-13 23:27:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1802. [2019-10-13 23:27:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1802 states. [2019-10-13 23:27:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2480 transitions. [2019-10-13 23:27:21,290 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2480 transitions. Word has length 129 [2019-10-13 23:27:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:21,292 INFO L462 AbstractCegarLoop]: Abstraction has 1802 states and 2480 transitions. [2019-10-13 23:27:21,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2480 transitions. [2019-10-13 23:27:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 23:27:21,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:21,297 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 23:27:21,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:21,504 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1388662650, now seen corresponding path program 1 times [2019-10-13 23:27:21,505 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:21,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346878199] [2019-10-13 23:27:21,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:21,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 23:27:21,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346878199] [2019-10-13 23:27:21,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:21,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:21,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638870567] [2019-10-13 23:27:21,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:21,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:21,619 INFO L87 Difference]: Start difference. First operand 1802 states and 2480 transitions. Second operand 3 states. [2019-10-13 23:27:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:21,888 INFO L93 Difference]: Finished difference Result 4711 states and 6541 transitions. [2019-10-13 23:27:21,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:21,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-13 23:27:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:21,914 INFO L225 Difference]: With dead ends: 4711 [2019-10-13 23:27:21,914 INFO L226 Difference]: Without dead ends: 2926 [2019-10-13 23:27:21,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2019-10-13 23:27:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2520. [2019-10-13 23:27:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2019-10-13 23:27:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3435 transitions. [2019-10-13 23:27:22,129 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3435 transitions. Word has length 129 [2019-10-13 23:27:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:22,130 INFO L462 AbstractCegarLoop]: Abstraction has 2520 states and 3435 transitions. [2019-10-13 23:27:22,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3435 transitions. [2019-10-13 23:27:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 23:27:22,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:22,139 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:22,140 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:22,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash -234862087, now seen corresponding path program 1 times [2019-10-13 23:27:22,141 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:22,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269934202] [2019-10-13 23:27:22,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:22,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 23:27:22,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269934202] [2019-10-13 23:27:22,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276699335] [2019-10-13 23:27:22,243 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 [2019-10-13 23:27:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:22,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:27:22,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 23:27:22,484 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 23:27:22,703 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:27:22,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 6 [2019-10-13 23:27:22,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351313403] [2019-10-13 23:27:22,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:22,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:22,705 INFO L87 Difference]: Start difference. First operand 2520 states and 3435 transitions. Second operand 4 states. [2019-10-13 23:27:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:23,240 INFO L93 Difference]: Finished difference Result 7416 states and 10613 transitions. [2019-10-13 23:27:23,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:23,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2019-10-13 23:27:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:23,291 INFO L225 Difference]: With dead ends: 7416 [2019-10-13 23:27:23,291 INFO L226 Difference]: Without dead ends: 4912 [2019-10-13 23:27:23,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:27:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2019-10-13 23:27:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4799. [2019-10-13 23:27:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4799 states. [2019-10-13 23:27:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 6393 transitions. [2019-10-13 23:27:23,736 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 6393 transitions. Word has length 129 [2019-10-13 23:27:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:23,738 INFO L462 AbstractCegarLoop]: Abstraction has 4799 states and 6393 transitions. [2019-10-13 23:27:23,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 6393 transitions. [2019-10-13 23:27:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 23:27:23,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:23,746 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:23,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:23,952 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1430687984, now seen corresponding path program 1 times [2019-10-13 23:27:23,953 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:23,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751410493] [2019-10-13 23:27:23,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:23,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 23:27:24,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751410493] [2019-10-13 23:27:24,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:24,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:27:24,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360656003] [2019-10-13 23:27:24,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:27:24,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:27:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:24,033 INFO L87 Difference]: Start difference. First operand 4799 states and 6393 transitions. Second operand 3 states. [2019-10-13 23:27:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:24,597 INFO L93 Difference]: Finished difference Result 12672 states and 17268 transitions. [2019-10-13 23:27:24,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:27:24,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2019-10-13 23:27:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:24,651 INFO L225 Difference]: With dead ends: 12672 [2019-10-13 23:27:24,651 INFO L226 Difference]: Without dead ends: 7890 [2019-10-13 23:27:24,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:27:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2019-10-13 23:27:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 7289. [2019-10-13 23:27:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7289 states. [2019-10-13 23:27:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 9700 transitions. [2019-10-13 23:27:25,170 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 9700 transitions. Word has length 129 [2019-10-13 23:27:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:25,170 INFO L462 AbstractCegarLoop]: Abstraction has 7289 states and 9700 transitions. [2019-10-13 23:27:25,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:27:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 9700 transitions. [2019-10-13 23:27:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 23:27:25,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:25,180 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:25,180 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1613504212, now seen corresponding path program 1 times [2019-10-13 23:27:25,181 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:25,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092120267] [2019-10-13 23:27:25,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:25,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:25,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 23:27:25,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092120267] [2019-10-13 23:27:25,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:25,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:27:25,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029429937] [2019-10-13 23:27:25,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:27:25,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:27:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:27:25,267 INFO L87 Difference]: Start difference. First operand 7289 states and 9700 transitions. Second operand 4 states. [2019-10-13 23:27:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:25,948 INFO L93 Difference]: Finished difference Result 15665 states and 20839 transitions. [2019-10-13 23:27:25,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:27:25,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 23:27:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:26,004 INFO L225 Difference]: With dead ends: 15665 [2019-10-13 23:27:26,005 INFO L226 Difference]: Without dead ends: 8393 [2019-10-13 23:27:26,041 INFO L600 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 [2019-10-13 23:27:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2019-10-13 23:27:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8377. [2019-10-13 23:27:26,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8377 states. [2019-10-13 23:27:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8377 states to 8377 states and 10906 transitions. [2019-10-13 23:27:26,607 INFO L78 Accepts]: Start accepts. Automaton has 8377 states and 10906 transitions. Word has length 130 [2019-10-13 23:27:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:26,607 INFO L462 AbstractCegarLoop]: Abstraction has 8377 states and 10906 transitions. [2019-10-13 23:27:26,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:27:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8377 states and 10906 transitions. [2019-10-13 23:27:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 23:27:26,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:26,622 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:26,622 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1495307938, now seen corresponding path program 1 times [2019-10-13 23:27:26,623 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:26,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690241970] [2019-10-13 23:27:26,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:26,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:26,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-13 23:27:26,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690241970] [2019-10-13 23:27:26,770 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:26,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 23:27:26,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452671257] [2019-10-13 23:27:26,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:27:26,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:27:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:27:26,772 INFO L87 Difference]: Start difference. First operand 8377 states and 10906 transitions. Second operand 9 states. [2019-10-13 23:27:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:28,846 INFO L93 Difference]: Finished difference Result 25960 states and 35023 transitions. [2019-10-13 23:27:28,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 23:27:28,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2019-10-13 23:27:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:28,924 INFO L225 Difference]: With dead ends: 25960 [2019-10-13 23:27:28,924 INFO L226 Difference]: Without dead ends: 12115 [2019-10-13 23:27:28,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:27:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12115 states. [2019-10-13 23:27:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12115 to 10947. [2019-10-13 23:27:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10947 states. [2019-10-13 23:27:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 14399 transitions. [2019-10-13 23:27:30,335 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 14399 transitions. Word has length 131 [2019-10-13 23:27:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:30,336 INFO L462 AbstractCegarLoop]: Abstraction has 10947 states and 14399 transitions. [2019-10-13 23:27:30,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:27:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 14399 transitions. [2019-10-13 23:27:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 23:27:30,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:30,352 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:30,352 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash 519823223, now seen corresponding path program 1 times [2019-10-13 23:27:30,353 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:30,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914540514] [2019-10-13 23:27:30,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:30,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:30,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-13 23:27:30,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914540514] [2019-10-13 23:27:30,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315693237] [2019-10-13 23:27:30,746 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 [2019-10-13 23:27:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:30,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:30,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:27:31,140 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:31,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:31,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:31,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:31,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 23:27:31,526 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:31,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20, 8] total 33 [2019-10-13 23:27:31,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348224967] [2019-10-13 23:27:31,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:27:31,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:31,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:27:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 23:27:31,528 INFO L87 Difference]: Start difference. First operand 10947 states and 14399 transitions. Second operand 11 states. [2019-10-13 23:27:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:34,117 INFO L93 Difference]: Finished difference Result 28771 states and 40434 transitions. [2019-10-13 23:27:34,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 23:27:34,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-13 23:27:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:34,227 INFO L225 Difference]: With dead ends: 28771 [2019-10-13 23:27:34,228 INFO L226 Difference]: Without dead ends: 17841 [2019-10-13 23:27:34,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 300 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2019-10-13 23:27:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17841 states. [2019-10-13 23:27:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17841 to 16762. [2019-10-13 23:27:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16762 states. [2019-10-13 23:27:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16762 states to 16762 states and 22832 transitions. [2019-10-13 23:27:35,867 INFO L78 Accepts]: Start accepts. Automaton has 16762 states and 22832 transitions. Word has length 154 [2019-10-13 23:27:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:35,867 INFO L462 AbstractCegarLoop]: Abstraction has 16762 states and 22832 transitions. [2019-10-13 23:27:35,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 23:27:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 16762 states and 22832 transitions. [2019-10-13 23:27:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 23:27:35,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:35,880 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:36,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:36,086 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash 743000243, now seen corresponding path program 1 times [2019-10-13 23:27:36,087 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:36,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779841081] [2019-10-13 23:27:36,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:36,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:36,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 23:27:36,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779841081] [2019-10-13 23:27:36,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600353459] [2019-10-13 23:27:36,262 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 [2019-10-13 23:27:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:36,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 23:27:36,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:27:36,561 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:36,812 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-10-13 23:27:37,125 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2019-10-13 23:27:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 23:27:37,235 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:37,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 6] total 18 [2019-10-13 23:27:37,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695088645] [2019-10-13 23:27:37,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 23:27:37,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:37,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 23:27:37,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:27:37,237 INFO L87 Difference]: Start difference. First operand 16762 states and 22832 transitions. Second operand 6 states. [2019-10-13 23:27:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:38,500 INFO L93 Difference]: Finished difference Result 30604 states and 42010 transitions. [2019-10-13 23:27:38,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 23:27:38,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-13 23:27:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:38,563 INFO L225 Difference]: With dead ends: 30604 [2019-10-13 23:27:38,563 INFO L226 Difference]: Without dead ends: 13859 [2019-10-13 23:27:38,619 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2019-10-13 23:27:38,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13859 states. [2019-10-13 23:27:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13859 to 11119. [2019-10-13 23:27:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11119 states. [2019-10-13 23:27:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11119 states to 11119 states and 14519 transitions. [2019-10-13 23:27:39,233 INFO L78 Accepts]: Start accepts. Automaton has 11119 states and 14519 transitions. Word has length 156 [2019-10-13 23:27:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:39,234 INFO L462 AbstractCegarLoop]: Abstraction has 11119 states and 14519 transitions. [2019-10-13 23:27:39,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 23:27:39,234 INFO L276 IsEmpty]: Start isEmpty. Operand 11119 states and 14519 transitions. [2019-10-13 23:27:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-13 23:27:39,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:39,245 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:39,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:39,450 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:39,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1896392692, now seen corresponding path program 1 times [2019-10-13 23:27:39,450 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:39,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074856621] [2019-10-13 23:27:39,450 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:39,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:39,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 23:27:39,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074856621] [2019-10-13 23:27:39,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:27:39,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 23:27:39,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725577838] [2019-10-13 23:27:39,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:27:39,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:27:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:27:39,574 INFO L87 Difference]: Start difference. First operand 11119 states and 14519 transitions. Second operand 8 states. [2019-10-13 23:27:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:40,700 INFO L93 Difference]: Finished difference Result 20251 states and 27372 transitions. [2019-10-13 23:27:40,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:27:40,700 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 177 [2019-10-13 23:27:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:40,747 INFO L225 Difference]: With dead ends: 20251 [2019-10-13 23:27:40,747 INFO L226 Difference]: Without dead ends: 10022 [2019-10-13 23:27:40,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:27:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2019-10-13 23:27:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 9464. [2019-10-13 23:27:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9464 states. [2019-10-13 23:27:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 11917 transitions. [2019-10-13 23:27:41,387 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 11917 transitions. Word has length 177 [2019-10-13 23:27:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:41,388 INFO L462 AbstractCegarLoop]: Abstraction has 9464 states and 11917 transitions. [2019-10-13 23:27:41,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:27:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 11917 transitions. [2019-10-13 23:27:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-13 23:27:41,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:41,397 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:41,398 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1288906095, now seen corresponding path program 1 times [2019-10-13 23:27:41,398 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:41,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498022370] [2019-10-13 23:27:41,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:41,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:41,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 23:27:41,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498022370] [2019-10-13 23:27:41,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803444855] [2019-10-13 23:27:41,513 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 [2019-10-13 23:27:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:41,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 23:27:41,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-13 23:27:41,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:41,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:27:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 23:27:42,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:27:42,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 7] total 14 [2019-10-13 23:27:42,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797158180] [2019-10-13 23:27:42,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 23:27:42,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:27:42,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 23:27:42,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-13 23:27:42,105 INFO L87 Difference]: Start difference. First operand 9464 states and 11917 transitions. Second operand 9 states. [2019-10-13 23:27:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:27:43,506 INFO L93 Difference]: Finished difference Result 21188 states and 28557 transitions. [2019-10-13 23:27:43,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:27:43,507 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-13 23:27:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:27:43,568 INFO L225 Difference]: With dead ends: 21188 [2019-10-13 23:27:43,568 INFO L226 Difference]: Without dead ends: 12276 [2019-10-13 23:27:43,607 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2019-10-13 23:27:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12276 states. [2019-10-13 23:27:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12276 to 11556. [2019-10-13 23:27:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11556 states. [2019-10-13 23:27:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11556 states to 11556 states and 15078 transitions. [2019-10-13 23:27:44,418 INFO L78 Accepts]: Start accepts. Automaton has 11556 states and 15078 transitions. Word has length 178 [2019-10-13 23:27:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:27:44,419 INFO L462 AbstractCegarLoop]: Abstraction has 11556 states and 15078 transitions. [2019-10-13 23:27:44,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 23:27:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 11556 states and 15078 transitions. [2019-10-13 23:27:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 23:27:44,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:27:44,426 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:27:44,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:27:44,635 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:27:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:27:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1622875971, now seen corresponding path program 1 times [2019-10-13 23:27:44,636 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:27:44,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363674557] [2019-10-13 23:27:44,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:44,636 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:27:44,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:27:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 23:27:44,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363674557] [2019-10-13 23:27:44,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507710075] [2019-10-13 23:27:44,749 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 [2019-10-13 23:27:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:27:45,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-13 23:27:45,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:27:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:27:45,273 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:27:45,503 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-13 23:27:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 23:27:45,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69600116] [2019-10-13 23:27:45,908 INFO L162 IcfgInterpreter]: Started Sifa with 99 locations of interest [2019-10-13 23:27:45,909 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:27:45,915 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:27:45,923 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:27:45,923 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:27:46,167 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 58 for LOIs [2019-10-13 23:27:46,205 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs [2019-10-13 23:27:46,740 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 63 for LOIs [2019-10-13 23:27:46,813 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 106 for LOIs