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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/systemc/kundu1.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:31:48,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:31:48,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:31:48,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:31:48,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:31:48,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:31:48,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:31:48,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:31:48,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:31:48,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:31:48,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:31:48,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:31:48,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:31:48,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:31:48,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:31:48,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:31:48,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:31:48,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:31:48,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:31:48,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:31:48,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:31:48,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:31:48,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:31:48,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:31:48,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:31:48,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:31:48,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:31:48,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:31:48,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:31:48,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:31:48,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:31:48,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:31:48,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:31:48,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:31:48,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:31:48,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:31:48,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:31:48,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:31:48,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:31:48,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:31:48,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:31:48,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:31:48,802 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:31:48,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:31:48,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:31:48,803 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:31:48,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:31:48,804 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:31:48,805 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:31:48,805 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:31:48,805 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:31:48,805 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:31:48,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:31:48,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:31:48,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:31:48,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:31:48,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:31:48,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:31:48,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:31:48,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:31:48,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:31:48,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:31:48,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:31:48,810 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:31:48,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:31:48,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:31:48,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:31:48,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:31:48,811 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:31:48,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:31:48,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:31:48,812 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:31:48,851 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:31:48,864 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:31:48,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:31:48,869 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:31:48,869 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:31:48,870 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu1.cil.c [2019-09-20 13:31:48,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371a6684b/8d88f2c7e75a4ccd9bae2f00075e7f0c/FLAG06da8d70a [2019-09-20 13:31:49,475 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:31:49,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu1.cil.c [2019-09-20 13:31:49,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371a6684b/8d88f2c7e75a4ccd9bae2f00075e7f0c/FLAG06da8d70a [2019-09-20 13:31:49,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371a6684b/8d88f2c7e75a4ccd9bae2f00075e7f0c [2019-09-20 13:31:49,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:31:49,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:31:49,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:31:49,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:31:49,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:31:49,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:31:49" (1/1) ... [2019-09-20 13:31:49,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564519e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:49, skipping insertion in model container [2019-09-20 13:31:49,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:31:49" (1/1) ... [2019-09-20 13:31:49,806 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:31:49,850 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:31:50,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:31:50,054 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:31:50,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:31:50,209 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:31:50,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50 WrapperNode [2019-09-20 13:31:50,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:31:50,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:31:50,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:31:50,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:31:50,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (1/1) ... [2019-09-20 13:31:50,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:31:50,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:31:50,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:31:50,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:31:50,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (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 [2019-09-20 13:31:50,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:31:50,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:31:50,325 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-09-20 13:31:50,325 INFO L138 BoogieDeclarations]: Found implementation of procedure read_data [2019-09-20 13:31:50,325 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2019-09-20 13:31:50,325 INFO L138 BoogieDeclarations]: Found implementation of procedure P_1 [2019-09-20 13:31:50,325 INFO L138 BoogieDeclarations]: Found implementation of procedure is_P_1_triggered [2019-09-20 13:31:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure C_1 [2019-09-20 13:31:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure is_C_1_triggered [2019-09-20 13:31:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-09-20 13:31:50,326 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-09-20 13:31:50,327 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-09-20 13:31:50,328 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-09-20 13:31:50,328 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-09-20 13:31:50,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-09-20 13:31:50,329 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-09-20 13:31:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-09-20 13:31:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-09-20 13:31:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-09-20 13:31:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-09-20 13:31:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-09-20 13:31:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-09-20 13:31:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:31:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:31:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:31:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-09-20 13:31:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-09-20 13:31:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure read_data [2019-09-20 13:31:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2019-09-20 13:31:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure P_1 [2019-09-20 13:31:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure is_P_1_triggered [2019-09-20 13:31:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure C_1 [2019-09-20 13:31:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure is_C_1_triggered [2019-09-20 13:31:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-09-20 13:31:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-09-20 13:31:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-09-20 13:31:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-09-20 13:31:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-09-20 13:31:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-09-20 13:31:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-09-20 13:31:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-09-20 13:31:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-09-20 13:31:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-09-20 13:31:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-09-20 13:31:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-09-20 13:31:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:31:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:31:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:31:50,875 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:31:50,876 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-20 13:31:50,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:31:50 BoogieIcfgContainer [2019-09-20 13:31:50,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:31:50,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:31:50,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:31:50,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:31:50,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:31:49" (1/3) ... [2019-09-20 13:31:50,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75514c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:31:50, skipping insertion in model container [2019-09-20 13:31:50,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:31:50" (2/3) ... [2019-09-20 13:31:50,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75514c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:31:50, skipping insertion in model container [2019-09-20 13:31:50,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:31:50" (3/3) ... [2019-09-20 13:31:50,885 INFO L109 eAbstractionObserver]: Analyzing ICFG kundu1.cil.c [2019-09-20 13:31:50,894 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:31:50,902 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:31:50,918 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:31:50,944 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:31:50,944 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:31:50,944 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:31:50,945 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:31:50,945 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:31:50,945 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:31:50,945 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:31:50,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:31:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2019-09-20 13:31:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-20 13:31:50,982 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:50,982 INFO L407 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] [2019-09-20 13:31:50,985 INFO L418 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -798642762, now seen corresponding path program 1 times [2019-09-20 13:31:50,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:51,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:51,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:51,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:51,045 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:51,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:51,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:31:51,321 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:51,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:31:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:31:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:31:51,345 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2019-09-20 13:31:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:51,718 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-09-20 13:31:51,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:31:51,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-09-20 13:31:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:51,739 INFO L225 Difference]: With dead ends: 272 [2019-09-20 13:31:51,740 INFO L226 Difference]: Without dead ends: 258 [2019-09-20 13:31:51,742 INFO L636 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 [2019-09-20 13:31:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-09-20 13:31:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2019-09-20 13:31:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2019-09-20 13:31:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 315 transitions. [2019-09-20 13:31:51,829 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 315 transitions. Word has length 72 [2019-09-20 13:31:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:51,829 INFO L475 AbstractCegarLoop]: Abstraction has 246 states and 315 transitions. [2019-09-20 13:31:51,830 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:31:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 315 transitions. [2019-09-20 13:31:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-20 13:31:51,834 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:51,834 INFO L407 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] [2019-09-20 13:31:51,835 INFO L418 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:51,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1672120457, now seen corresponding path program 1 times [2019-09-20 13:31:51,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:51,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:51,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:51,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:51,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:52,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:52,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:31:52,009 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:52,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:31:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:31:52,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:31:52,012 INFO L87 Difference]: Start difference. First operand 246 states and 315 transitions. Second operand 4 states. [2019-09-20 13:31:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:52,297 INFO L93 Difference]: Finished difference Result 459 states and 577 transitions. [2019-09-20 13:31:52,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:31:52,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-09-20 13:31:52,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:52,303 INFO L225 Difference]: With dead ends: 459 [2019-09-20 13:31:52,303 INFO L226 Difference]: Without dead ends: 459 [2019-09-20 13:31:52,304 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:31:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-09-20 13:31:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2019-09-20 13:31:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2019-09-20 13:31:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 547 transitions. [2019-09-20 13:31:52,399 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 547 transitions. Word has length 72 [2019-09-20 13:31:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:52,399 INFO L475 AbstractCegarLoop]: Abstraction has 434 states and 547 transitions. [2019-09-20 13:31:52,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:31:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 547 transitions. [2019-09-20 13:31:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-20 13:31:52,404 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:52,404 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:52,404 INFO L418 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -539585734, now seen corresponding path program 1 times [2019-09-20 13:31:52,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:52,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:52,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:52,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:52,411 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:52,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:52,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:31:52,527 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:52,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:31:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:31:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:31:52,529 INFO L87 Difference]: Start difference. First operand 434 states and 547 transitions. Second operand 4 states. [2019-09-20 13:31:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:52,764 INFO L93 Difference]: Finished difference Result 655 states and 823 transitions. [2019-09-20 13:31:52,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:31:52,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2019-09-20 13:31:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:52,771 INFO L225 Difference]: With dead ends: 655 [2019-09-20 13:31:52,771 INFO L226 Difference]: Without dead ends: 655 [2019-09-20 13:31:52,772 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:31:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2019-09-20 13:31:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 628. [2019-09-20 13:31:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-09-20 13:31:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 789 transitions. [2019-09-20 13:31:52,813 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 789 transitions. Word has length 73 [2019-09-20 13:31:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:52,815 INFO L475 AbstractCegarLoop]: Abstraction has 628 states and 789 transitions. [2019-09-20 13:31:52,816 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:31:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 789 transitions. [2019-09-20 13:31:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-20 13:31:52,821 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:52,821 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:52,822 INFO L418 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1990564953, now seen corresponding path program 1 times [2019-09-20 13:31:52,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:52,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:52,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:52,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:52,827 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:52,952 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:52,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:31:52,953 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:52,955 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:31:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:31:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:31:52,956 INFO L87 Difference]: Start difference. First operand 628 states and 789 transitions. Second operand 6 states. [2019-09-20 13:31:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:53,026 INFO L93 Difference]: Finished difference Result 658 states and 825 transitions. [2019-09-20 13:31:53,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:31:53,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-09-20 13:31:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:53,031 INFO L225 Difference]: With dead ends: 658 [2019-09-20 13:31:53,031 INFO L226 Difference]: Without dead ends: 658 [2019-09-20 13:31:53,032 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:31:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2019-09-20 13:31:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 643. [2019-09-20 13:31:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2019-09-20 13:31:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 801 transitions. [2019-09-20 13:31:53,061 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 801 transitions. Word has length 73 [2019-09-20 13:31:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:53,062 INFO L475 AbstractCegarLoop]: Abstraction has 643 states and 801 transitions. [2019-09-20 13:31:53,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:31:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 801 transitions. [2019-09-20 13:31:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-20 13:31:53,064 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:53,064 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:53,064 INFO L418 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash 618757655, now seen corresponding path program 1 times [2019-09-20 13:31:53,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:53,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:53,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:53,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:53,067 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:53,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:53,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:31:53,224 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:53,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:31:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:31:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:31:53,225 INFO L87 Difference]: Start difference. First operand 643 states and 801 transitions. Second operand 6 states. [2019-09-20 13:31:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:53,269 INFO L93 Difference]: Finished difference Result 671 states and 831 transitions. [2019-09-20 13:31:53,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:31:53,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-09-20 13:31:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:53,274 INFO L225 Difference]: With dead ends: 671 [2019-09-20 13:31:53,275 INFO L226 Difference]: Without dead ends: 671 [2019-09-20 13:31:53,275 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:31:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-09-20 13:31:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 663. [2019-09-20 13:31:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2019-09-20 13:31:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 819 transitions. [2019-09-20 13:31:53,304 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 819 transitions. Word has length 73 [2019-09-20 13:31:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:53,305 INFO L475 AbstractCegarLoop]: Abstraction has 663 states and 819 transitions. [2019-09-20 13:31:53,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:31:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 819 transitions. [2019-09-20 13:31:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-20 13:31:53,306 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:53,307 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:53,307 INFO L418 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:53,307 INFO L82 PathProgramCache]: Analyzing trace with hash 641389909, now seen corresponding path program 1 times [2019-09-20 13:31:53,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:53,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:53,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:53,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:53,309 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:53,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:53,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:31:53,448 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:53,449 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:31:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:31:53,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:31:53,455 INFO L87 Difference]: Start difference. First operand 663 states and 819 transitions. Second operand 6 states. [2019-09-20 13:31:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:53,548 INFO L93 Difference]: Finished difference Result 784 states and 968 transitions. [2019-09-20 13:31:53,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:31:53,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-09-20 13:31:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:53,554 INFO L225 Difference]: With dead ends: 784 [2019-09-20 13:31:53,555 INFO L226 Difference]: Without dead ends: 784 [2019-09-20 13:31:53,555 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:31:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2019-09-20 13:31:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 770. [2019-09-20 13:31:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2019-09-20 13:31:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 953 transitions. [2019-09-20 13:31:53,585 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 953 transitions. Word has length 73 [2019-09-20 13:31:53,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:53,585 INFO L475 AbstractCegarLoop]: Abstraction has 770 states and 953 transitions. [2019-09-20 13:31:53,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:31:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 953 transitions. [2019-09-20 13:31:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-20 13:31:53,587 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:53,587 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:53,588 INFO L418 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash 298865229, now seen corresponding path program 1 times [2019-09-20 13:31:53,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:53,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:53,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:53,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:53,590 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:53,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:53,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:31:53,666 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:53,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:31:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:31:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:31:53,668 INFO L87 Difference]: Start difference. First operand 770 states and 953 transitions. Second operand 6 states. [2019-09-20 13:31:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:54,453 INFO L93 Difference]: Finished difference Result 1052 states and 1399 transitions. [2019-09-20 13:31:54,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:31:54,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2019-09-20 13:31:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:54,463 INFO L225 Difference]: With dead ends: 1052 [2019-09-20 13:31:54,463 INFO L226 Difference]: Without dead ends: 1052 [2019-09-20 13:31:54,464 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:31:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2019-09-20 13:31:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 996. [2019-09-20 13:31:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2019-09-20 13:31:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1303 transitions. [2019-09-20 13:31:54,512 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1303 transitions. Word has length 86 [2019-09-20 13:31:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:54,513 INFO L475 AbstractCegarLoop]: Abstraction has 996 states and 1303 transitions. [2019-09-20 13:31:54,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:31:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1303 transitions. [2019-09-20 13:31:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-20 13:31:54,514 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:54,515 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:54,515 INFO L418 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash -681624608, now seen corresponding path program 1 times [2019-09-20 13:31:54,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:54,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:54,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:54,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:54,517 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:31:54,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:31:54,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-20 13:31:54,671 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:54,672 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:31:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:31:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:31:54,673 INFO L87 Difference]: Start difference. First operand 996 states and 1303 transitions. Second operand 9 states. [2019-09-20 13:31:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:31:56,279 INFO L93 Difference]: Finished difference Result 1719 states and 2445 transitions. [2019-09-20 13:31:56,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-20 13:31:56,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 90 [2019-09-20 13:31:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:31:56,292 INFO L225 Difference]: With dead ends: 1719 [2019-09-20 13:31:56,292 INFO L226 Difference]: Without dead ends: 1719 [2019-09-20 13:31:56,293 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2019-09-20 13:31:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2019-09-20 13:31:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1584. [2019-09-20 13:31:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1584 states. [2019-09-20 13:31:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2177 transitions. [2019-09-20 13:31:56,366 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2177 transitions. Word has length 90 [2019-09-20 13:31:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:31:56,368 INFO L475 AbstractCegarLoop]: Abstraction has 1584 states and 2177 transitions. [2019-09-20 13:31:56,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:31:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2177 transitions. [2019-09-20 13:31:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-20 13:31:56,370 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:31:56,370 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:31:56,370 INFO L418 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:31:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1835313196, now seen corresponding path program 1 times [2019-09-20 13:31:56,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:31:56,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:56,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:31:56,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:31:56,373 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:31:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:31:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 13:31:56,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:31:56,429 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:31:56,430 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 93 with the following transitions: [2019-09-20 13:31:56,432 INFO L207 CegarAbsIntRunner]: [43], [48], [62], [78], [80], [85], [88], [93], [95], [96], [99], [108], [109], [110], [127], [137], [139], [141], [142], [145], [151], [155], [158], [159], [160], [169], [172], [175], [190], [194], [197], [209], [212], [214], [217], [233], [237], [242], [245], [258], [259], [260], [274], [276], [309], [319], [330], [332], [334], [335], [336], [337], [342], [343], [344], [350], [351], [352], [353], [356], [357], [360], [361], [362], [366], [367], [368], [369], [370], [371], [372], [373], [374], [375], [376], [396], [397], [398] [2019-09-20 13:31:56,501 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:31:56,501 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:31:56,700 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:31:56,702 INFO L272 AbstractInterpreter]: Visited 63 different actions 63 times. Never merged. Never widened. Performed 261 root evaluator evaluations with a maximum evaluation depth of 4. Performed 261 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 38 variables. [2019-09-20 13:31:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:31:56,707 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:31:56,961 INFO L227 lantSequenceWeakener]: Weakened 71 states. On average, predicates are now at 81.91% of their original sizes. [2019-09-20 13:31:56,961 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:31:57,325 INFO L420 sIntCurrentIteration]: We unified 91 AI predicates to 91 [2019-09-20 13:31:57,326 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:31:57,327 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:31:57,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [3] total 25 [2019-09-20 13:31:57,330 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:31:57,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-20 13:31:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-20 13:31:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2019-09-20 13:31:57,332 INFO L87 Difference]: Start difference. First operand 1584 states and 2177 transitions. Second operand 24 states. [2019-09-20 13:32:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:32:00,230 INFO L93 Difference]: Finished difference Result 1546 states and 2118 transitions. [2019-09-20 13:32:00,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-20 13:32:00,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 92 [2019-09-20 13:32:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:32:00,243 INFO L225 Difference]: With dead ends: 1546 [2019-09-20 13:32:00,243 INFO L226 Difference]: Without dead ends: 1546 [2019-09-20 13:32:00,244 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2019-09-20 13:32:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2019-09-20 13:32:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1543. [2019-09-20 13:32:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2019-09-20 13:32:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2114 transitions. [2019-09-20 13:32:00,304 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2114 transitions. Word has length 92 [2019-09-20 13:32:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:32:00,305 INFO L475 AbstractCegarLoop]: Abstraction has 1543 states and 2114 transitions. [2019-09-20 13:32:00,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-20 13:32:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2114 transitions. [2019-09-20 13:32:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-20 13:32:00,309 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:32:00,309 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:32:00,310 INFO L418 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:32:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:32:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 545928688, now seen corresponding path program 1 times [2019-09-20 13:32:00,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:32:00,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:32:00,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:32:00,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:32:00,314 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:32:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:32:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 13:32:00,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:32:00,376 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:32:00,377 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 94 with the following transitions: [2019-09-20 13:32:00,377 INFO L207 CegarAbsIntRunner]: [43], [48], [62], [78], [80], [85], [88], [93], [95], [96], [99], [108], [109], [110], [127], [137], [139], [141], [142], [145], [151], [155], [158], [159], [160], [169], [172], [175], [181], [187], [190], [194], [197], [209], [212], [214], [217], [233], [237], [242], [245], [258], [259], [260], [274], [276], [309], [319], [330], [332], [334], [335], [336], [337], [342], [343], [344], [350], [351], [352], [353], [356], [357], [360], [361], [362], [366], [367], [368], [369], [370], [371], [372], [373], [374], [375], [376], [396], [397], [398] [2019-09-20 13:32:00,386 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:32:00,386 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:32:00,449 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:32:00,450 INFO L272 AbstractInterpreter]: Visited 75 different actions 88 times. Merged at 7 different actions 7 times. Never widened. Performed 403 root evaluator evaluations with a maximum evaluation depth of 4. Performed 403 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 39 variables. [2019-09-20 13:32:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:32:00,451 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:32:00,539 INFO L227 lantSequenceWeakener]: Weakened 86 states. On average, predicates are now at 82.99% of their original sizes. [2019-09-20 13:32:00,540 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:32:01,098 INFO L420 sIntCurrentIteration]: We unified 92 AI predicates to 92 [2019-09-20 13:32:01,098 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:32:01,099 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:32:01,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [34] imperfect sequences [3] total 35 [2019-09-20 13:32:01,099 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:32:01,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-20 13:32:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-20 13:32:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2019-09-20 13:32:01,101 INFO L87 Difference]: Start difference. First operand 1543 states and 2114 transitions. Second operand 34 states. [2019-09-20 13:32:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:32:10,218 INFO L93 Difference]: Finished difference Result 2375 states and 3394 transitions. [2019-09-20 13:32:10,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-20 13:32:10,218 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2019-09-20 13:32:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:32:10,239 INFO L225 Difference]: With dead ends: 2375 [2019-09-20 13:32:10,239 INFO L226 Difference]: Without dead ends: 2290 [2019-09-20 13:32:10,244 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=5278, Unknown=0, NotChecked=0, Total=6162 [2019-09-20 13:32:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2019-09-20 13:32:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2133. [2019-09-20 13:32:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2133 states. [2019-09-20 13:32:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 2969 transitions. [2019-09-20 13:32:10,430 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 2969 transitions. Word has length 93 [2019-09-20 13:32:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:32:10,431 INFO L475 AbstractCegarLoop]: Abstraction has 2133 states and 2969 transitions. [2019-09-20 13:32:10,431 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-20 13:32:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 2969 transitions. [2019-09-20 13:32:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-20 13:32:10,434 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:32:10,434 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:32:10,435 INFO L418 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:32:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:32:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1028804159, now seen corresponding path program 1 times [2019-09-20 13:32:10,436 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:32:10,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:32:10,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:32:10,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:32:10,439 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:32:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:32:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:32:10,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:32:10,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:32:10,603 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 98 with the following transitions: [2019-09-20 13:32:10,603 INFO L207 CegarAbsIntRunner]: [2], [4], [7], [18], [21], [28], [29], [32], [34], [39], [42], [43], [48], [62], [78], [80], [85], [88], [93], [95], [96], [99], [108], [109], [110], [127], [137], [139], [141], [142], [145], [151], [155], [158], [159], [160], [169], [172], [175], [181], [184], [203], [259], [260], [274], [276], [309], [319], [330], [332], [334], [335], [336], [337], [338], [339], [340], [342], [343], [344], [350], [351], [352], [353], [356], [357], [358], [359], [366], [367], [368], [369], [370], [371], [372], [373], [374], [375], [376], [396], [397], [398] [2019-09-20 13:32:10,607 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:32:10,607 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:32:10,636 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:32:10,637 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 330 root evaluator evaluations with a maximum evaluation depth of 4. Performed 330 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 38 variables. [2019-09-20 13:32:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:32:10,637 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:32:10,721 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 82.39% of their original sizes. [2019-09-20 13:32:10,721 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:32:11,485 INFO L420 sIntCurrentIteration]: We unified 96 AI predicates to 96 [2019-09-20 13:32:11,485 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:32:11,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:32:11,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [36] imperfect sequences [8] total 42 [2019-09-20 13:32:11,486 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:32:11,487 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-20 13:32:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-20 13:32:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2019-09-20 13:32:11,489 INFO L87 Difference]: Start difference. First operand 2133 states and 2969 transitions. Second operand 36 states. [2019-09-20 13:32:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:32:16,766 INFO L93 Difference]: Finished difference Result 2237 states and 3100 transitions. [2019-09-20 13:32:16,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-20 13:32:16,766 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 97 [2019-09-20 13:32:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:32:16,781 INFO L225 Difference]: With dead ends: 2237 [2019-09-20 13:32:16,782 INFO L226 Difference]: Without dead ends: 2237 [2019-09-20 13:32:16,783 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=603, Invalid=2819, Unknown=0, NotChecked=0, Total=3422 [2019-09-20 13:32:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2019-09-20 13:32:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2224. [2019-09-20 13:32:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2224 states. [2019-09-20 13:32:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3086 transitions. [2019-09-20 13:32:16,881 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3086 transitions. Word has length 97 [2019-09-20 13:32:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:32:16,881 INFO L475 AbstractCegarLoop]: Abstraction has 2224 states and 3086 transitions. [2019-09-20 13:32:16,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-20 13:32:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3086 transitions. [2019-09-20 13:32:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-20 13:32:16,884 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:32:16,884 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:32:16,884 INFO L418 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:32:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:32:16,886 INFO L82 PathProgramCache]: Analyzing trace with hash 109255140, now seen corresponding path program 1 times [2019-09-20 13:32:16,886 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:32:16,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:32:16,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:32:16,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:32:16,889 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:32:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:32:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:32:17,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:32:17,004 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:32:17,004 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2019-09-20 13:32:17,006 INFO L207 CegarAbsIntRunner]: [2], [4], [7], [18], [21], [28], [29], [32], [34], [39], [42], [43], [48], [62], [78], [80], [85], [88], [93], [95], [96], [99], [108], [109], [110], [127], [137], [139], [141], [142], [145], [151], [155], [158], [159], [160], [169], [172], [175], [181], [184], [194], [197], [209], [212], [231], [256], [258], [259], [260], [274], [276], [309], [319], [330], [332], [334], [335], [336], [337], [338], [339], [340], [342], [343], [344], [350], [351], [352], [353], [356], [357], [358], [359], [360], [361], [366], [367], [368], [369], [370], [371], [372], [373], [374], [375], [376], [396], [397], [398] [2019-09-20 13:32:17,013 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:32:17,013 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:32:17,045 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:32:17,046 INFO L272 AbstractInterpreter]: Visited 83 different actions 83 times. Never merged. Never widened. Performed 374 root evaluator evaluations with a maximum evaluation depth of 4. Performed 374 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 39 variables. [2019-09-20 13:32:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:32:17,047 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:32:17,125 INFO L227 lantSequenceWeakener]: Weakened 96 states. On average, predicates are now at 81.17% of their original sizes. [2019-09-20 13:32:17,125 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:32:17,890 INFO L420 sIntCurrentIteration]: We unified 104 AI predicates to 104 [2019-09-20 13:32:17,891 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:32:17,891 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:32:17,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [38] imperfect sequences [9] total 45 [2019-09-20 13:32:17,892 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:32:17,892 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-20 13:32:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-20 13:32:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2019-09-20 13:32:17,893 INFO L87 Difference]: Start difference. First operand 2224 states and 3086 transitions. Second operand 38 states.