/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:14:38,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:14:38,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:14:38,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:14:38,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:14:38,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:14:38,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:14:38,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:14:38,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:14:38,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:14:38,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:14:38,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:14:38,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:14:38,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:14:38,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:14:38,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:14:38,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:14:38,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:14:38,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:14:38,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:14:38,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:14:38,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:14:38,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:14:38,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:14:38,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:14:38,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:14:38,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:14:38,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:14:38,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:14:38,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:14:38,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:14:38,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:14:38,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:14:38,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:14:38,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:14:38,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:14:38,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:14:38,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:14:38,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:14:38,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:14:38,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:14:38,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2020-08-21 16:14:38,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:14:38,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:14:38,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:14:38,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:14:38,209 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:14:38,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:14:38,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:14:38,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:14:38,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:14:38,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:14:38,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:14:38,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:14:38,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:14:38,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:14:38,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:14:38,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:14:38,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:14:38,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:14:38,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:14:38,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:14:38,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:14:38,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:14:38,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:14:38,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:14:38,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:14:38,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:14:38,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-21 16:14:38,215 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:14:38,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:14:38,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:14:38,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:14:38,542 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:14:38,542 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:14:38,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-21 16:14:38,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9df5f76dc/84e694eb45fb454e9047a3844c7b4d3b/FLAGed8985ee4 [2020-08-21 16:14:39,323 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:14:39,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-21 16:14:39,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9df5f76dc/84e694eb45fb454e9047a3844c7b4d3b/FLAGed8985ee4 [2020-08-21 16:14:39,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9df5f76dc/84e694eb45fb454e9047a3844c7b4d3b [2020-08-21 16:14:39,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:14:39,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:14:39,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:14:39,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:14:39,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:14:39,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:14:39" (1/1) ... [2020-08-21 16:14:39,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698a08ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:39, skipping insertion in model container [2020-08-21 16:14:39,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:14:39" (1/1) ... [2020-08-21 16:14:39,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:14:39,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:14:41,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:14:41,164 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:14:41,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:14:41,411 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:14:41,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41 WrapperNode [2020-08-21 16:14:41,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:14:41,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:14:41,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:14:41,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:14:41,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... [2020-08-21 16:14:41,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:14:41,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:14:41,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:14:41,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:14:41,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 16:14:41,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:14:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:14:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~~netdev_tx_t~0 [2020-08-21 16:14:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-08-21 16:14:41,694 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2020-08-21 16:14:41,696 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2020-08-21 16:14:41,697 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2020-08-21 16:14:41,698 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cloned [2020-08-21 16:14:41,698 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_shared [2020-08-21 16:14:41,698 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_share_check [2020-08-21 16:14:41,699 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2020-08-21 16:14:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2020-08-21 16:14:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_cow [2020-08-21 16:14:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cow [2020-08-21 16:14:41,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:14:41,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_zalloc [2020-08-21 16:14:41,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-21 16:14:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-21 16:14:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-21 16:14:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-21 16:14:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-21 16:14:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-21 16:14:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-21 16:14:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-21 16:14:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-08-21 16:14:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2020-08-21 16:14:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_dormant_off [2020-08-21 16:14:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2020-08-21 16:14:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2020-08-21 16:14:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connect_disconnect [2020-08-21 16:14:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connected [2020-08-21 16:14:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_disconnected [2020-08-21 16:14:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_data_indication [2020-08-21 16:14:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_data_transmit [2020-08-21 16:14:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_xmit [2020-08-21 16:14:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_open [2020-08-21 16:14:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_close [2020-08-21 16:14:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_rx [2020-08-21 16:14:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_ioctl [2020-08-21 16:14:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_init [2020-08-21 16:14:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_exit [2020-08-21 16:14:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_hdlc_proto_1 [2020-08-21 16:14:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:14:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2020-08-21 16:14:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2020-08-21 16:14:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2020-08-21 16:14:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2020-08-21 16:14:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2020-08-21 16:14:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2020-08-21 16:14:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_13 [2020-08-21 16:14:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_14 [2020-08-21 16:14:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2020-08-21 16:14:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2020-08-21 16:14:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2020-08-21 16:14:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2020-08-21 16:14:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2020-08-21 16:14:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-08-21 16:14:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-08-21 16:14:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-08-21 16:14:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-08-21 16:14:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2020-08-21 16:14:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-21 16:14:41,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2020-08-21 16:14:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2020-08-21 16:14:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2020-08-21 16:14:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2020-08-21 16:14:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2020-08-21 16:14:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-21 16:14:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_any [2020-08-21 16:14:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2020-08-21 16:14:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure attach_hdlc_protocol [2020-08-21 16:14:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2020-08-21 16:14:41,723 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_connect_request [2020-08-21 16:14:41,724 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_data_received [2020-08-21 16:14:41,724 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_data_request [2020-08-21 16:14:41,725 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_disconnect_request [2020-08-21 16:14:41,725 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_register [2020-08-21 16:14:41,725 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_unregister [2020-08-21 16:14:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure linkwatch_fire_event [2020-08-21 16:14:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2020-08-21 16:14:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure pskb_expand_head [2020-08-21 16:14:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure register_hdlc_protocol [2020-08-21 16:14:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_clone [2020-08-21 16:14:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2020-08-21 16:14:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2020-08-21 16:14:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2020-08-21 16:14:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_hdlc_protocol [2020-08-21 16:14:41,729 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-21 16:14:41,730 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 16:14:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:14:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-21 16:14:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2020-08-21 16:14:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2020-08-21 16:14:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2020-08-21 16:14:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:14:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2020-08-21 16:14:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2020-08-21 16:14:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2020-08-21 16:14:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2020-08-21 16:14:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2020-08-21 16:14:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2020-08-21 16:14:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure skb_clone [2020-08-21 16:14:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure pskb_expand_head [2020-08-21 16:14:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2020-08-21 16:14:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:14:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cloned [2020-08-21 16:14:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure skb_shared [2020-08-21 16:14:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure skb_share_check [2020-08-21 16:14:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:14:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2020-08-21 16:14:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2020-08-21 16:14:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2020-08-21 16:14:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2020-08-21 16:14:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2020-08-21 16:14:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:14:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2020-08-21 16:14:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_cow [2020-08-21 16:14:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cow [2020-08-21 16:14:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2020-08-21 16:14:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2020-08-21 16:14:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2020-08-21 16:14:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 16:14:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 16:14:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:14:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 16:14:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:14:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:14:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_zalloc [2020-08-21 16:14:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 16:14:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 16:14:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-21 16:14:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-21 16:14:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-21 16:14:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-21 16:14:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-21 16:14:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-21 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-21 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_hdlc_proto_1 [2020-08-21 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-08-21 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_any [2020-08-21 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2020-08-21 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_13 [2020-08-21 16:14:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_14 [2020-08-21 16:14:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure linkwatch_fire_event [2020-08-21 16:14:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure netif_dormant_off [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure register_hdlc_protocol [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_hdlc_protocol [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure attach_hdlc_protocol [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_register [2020-08-21 16:14:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_unregister [2020-08-21 16:14:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_connect_request [2020-08-21 16:14:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_disconnect_request [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_data_request [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_data_received [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure x25_ioctl [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connect_disconnect [2020-08-21 16:14:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connected [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure x25_disconnected [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure x25_data_indication [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure x25_data_transmit [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~~netdev_tx_t~0 [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure x25_xmit [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure x25_open [2020-08-21 16:14:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:14:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure x25_close [2020-08-21 16:14:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure x25_rx [2020-08-21 16:14:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-08-21 16:14:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mod_init [2020-08-21 16:14:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mod_exit [2020-08-21 16:14:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-21 16:14:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-21 16:14:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:14:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2020-08-21 16:14:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2020-08-21 16:14:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2020-08-21 16:14:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2020-08-21 16:14:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2020-08-21 16:14:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-08-21 16:14:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-08-21 16:14:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-08-21 16:14:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-08-21 16:14:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2020-08-21 16:14:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2020-08-21 16:14:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2020-08-21 16:14:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 16:14:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 16:14:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-21 16:14:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:14:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 16:14:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:14:42,506 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-21 16:14:43,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:14:43,339 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 16:14:43,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:14:43 BoogieIcfgContainer [2020-08-21 16:14:43,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:14:43,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:14:43,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:14:43,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:14:43,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:14:39" (1/3) ... [2020-08-21 16:14:43,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35657857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:14:43, skipping insertion in model container [2020-08-21 16:14:43,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:14:41" (2/3) ... [2020-08-21 16:14:43,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35657857 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:14:43, skipping insertion in model container [2020-08-21 16:14:43,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:14:43" (3/3) ... [2020-08-21 16:14:43,356 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-21 16:14:43,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:14:43,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:14:43,394 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:14:43,423 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:14:43,424 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:14:43,424 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:14:43,424 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:14:43,424 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:14:43,424 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:14:43,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:14:43,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:14:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states. [2020-08-21 16:14:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 16:14:43,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:14:43,493 INFO L422 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] [2020-08-21 16:14:43,494 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:14:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:14:43,502 INFO L82 PathProgramCache]: Analyzing trace with hash 856791813, now seen corresponding path program 1 times [2020-08-21 16:14:43,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:14:43,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683232373] [2020-08-21 16:14:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:14:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,030 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-08-21 16:14:44,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:14:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:14:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 16:14:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 16:14:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:14:44,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683232373] [2020-08-21 16:14:44,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:14:44,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:14:44,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592868820] [2020-08-21 16:14:44,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:14:44,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:14:44,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:14:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:14:44,196 INFO L87 Difference]: Start difference. First operand 477 states. Second operand 7 states. [2020-08-21 16:14:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:14:49,366 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-08-21 16:14:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:14:49,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-08-21 16:14:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:14:49,398 INFO L225 Difference]: With dead ends: 1386 [2020-08-21 16:14:49,399 INFO L226 Difference]: Without dead ends: 987 [2020-08-21 16:14:49,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:14:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-08-21 16:14:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 703. [2020-08-21 16:14:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-08-21 16:14:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 843 transitions. [2020-08-21 16:14:49,591 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 843 transitions. Word has length 54 [2020-08-21 16:14:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:14:49,592 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 843 transitions. [2020-08-21 16:14:49,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:14:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 843 transitions. [2020-08-21 16:14:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 16:14:49,597 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:14:49,597 INFO L422 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] [2020-08-21 16:14:49,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:14:49,598 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:14:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:14:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash 226580861, now seen corresponding path program 1 times [2020-08-21 16:14:49,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:14:49,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804255266] [2020-08-21 16:14:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:14:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:14:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:14:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:14:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 16:14:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:14:49,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804255266] [2020-08-21 16:14:49,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:14:49,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:14:49,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368256929] [2020-08-21 16:14:49,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:14:49,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:14:49,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:14:49,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:14:49,938 INFO L87 Difference]: Start difference. First operand 703 states and 843 transitions. Second operand 9 states. [2020-08-21 16:14:50,190 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-08-21 16:14:50,360 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-08-21 16:14:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:14:53,577 INFO L93 Difference]: Finished difference Result 1673 states and 2071 transitions. [2020-08-21 16:14:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:14:53,582 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-21 16:14:53,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:14:53,593 INFO L225 Difference]: With dead ends: 1673 [2020-08-21 16:14:53,593 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 16:14:53,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-21 16:14:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 16:14:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 702. [2020-08-21 16:14:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-21 16:14:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 839 transitions. [2020-08-21 16:14:53,732 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 839 transitions. Word has length 58 [2020-08-21 16:14:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:14:53,733 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 839 transitions. [2020-08-21 16:14:53,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:14:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 839 transitions. [2020-08-21 16:14:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 16:14:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:14:53,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-21 16:14:53,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:14:53,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:14:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:14:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1087478551, now seen corresponding path program 1 times [2020-08-21 16:14:53,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:14:53,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198202113] [2020-08-21 16:14:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:14:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:53,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:14:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:14:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:14:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:14:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:14:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:14:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:14:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:14:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:14:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 16:14:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:14:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 16:14:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:14:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-08-21 16:14:54,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198202113] [2020-08-21 16:14:54,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:14:54,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 16:14:54,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066443611] [2020-08-21 16:14:54,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:14:54,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:14:54,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:14:54,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:14:54,233 INFO L87 Difference]: Start difference. First operand 702 states and 839 transitions. Second operand 11 states. [2020-08-21 16:14:54,503 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-08-21 16:14:58,491 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-08-21 16:15:00,425 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-08-21 16:15:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:15:00,854 INFO L93 Difference]: Finished difference Result 2445 states and 3129 transitions. [2020-08-21 16:15:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 16:15:00,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-08-21 16:15:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:15:00,875 INFO L225 Difference]: With dead ends: 2445 [2020-08-21 16:15:00,876 INFO L226 Difference]: Without dead ends: 1743 [2020-08-21 16:15:00,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2020-08-21 16:15:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2020-08-21 16:15:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1469. [2020-08-21 16:15:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-08-21 16:15:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1818 transitions. [2020-08-21 16:15:01,007 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1818 transitions. Word has length 108 [2020-08-21 16:15:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:15:01,007 INFO L479 AbstractCegarLoop]: Abstraction has 1469 states and 1818 transitions. [2020-08-21 16:15:01,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:15:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1818 transitions. [2020-08-21 16:15:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 16:15:01,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:15:01,015 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:15:01,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:15:01,015 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:15:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:15:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1453768121, now seen corresponding path program 1 times [2020-08-21 16:15:01,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:15:01,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053567441] [2020-08-21 16:15:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:15:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:15:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:15:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:15:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 16:15:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:15:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 16:15:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 16:15:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-21 16:15:01,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053567441] [2020-08-21 16:15:01,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:15:01,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:15:01,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466643597] [2020-08-21 16:15:01,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:15:01,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:15:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:15:01,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:15:01,566 INFO L87 Difference]: Start difference. First operand 1469 states and 1818 transitions. Second operand 10 states. [2020-08-21 16:15:02,006 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-08-21 16:15:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:15:07,225 INFO L93 Difference]: Finished difference Result 4737 states and 6006 transitions. [2020-08-21 16:15:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:15:07,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-21 16:15:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:15:07,247 INFO L225 Difference]: With dead ends: 4737 [2020-08-21 16:15:07,248 INFO L226 Difference]: Without dead ends: 3284 [2020-08-21 16:15:07,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:15:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2020-08-21 16:15:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2727. [2020-08-21 16:15:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-08-21 16:15:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3337 transitions. [2020-08-21 16:15:07,562 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3337 transitions. Word has length 150 [2020-08-21 16:15:07,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:15:07,563 INFO L479 AbstractCegarLoop]: Abstraction has 2727 states and 3337 transitions. [2020-08-21 16:15:07,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:15:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3337 transitions. [2020-08-21 16:15:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 16:15:07,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:15:07,575 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:15:07,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:15:07,575 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:15:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:15:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash 385849721, now seen corresponding path program 1 times [2020-08-21 16:15:07,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:15:07,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881714345] [2020-08-21 16:15:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:15:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:15:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 16:15:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:15:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 16:15:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 16:15:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:07,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:08,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:08,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:08,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 16:15:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:08,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 16:15:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-08-21 16:15:08,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881714345] [2020-08-21 16:15:08,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:15:08,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:15:08,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867632232] [2020-08-21 16:15:08,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:15:08,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:15:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:15:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:15:08,071 INFO L87 Difference]: Start difference. First operand 2727 states and 3337 transitions. Second operand 10 states. [2020-08-21 16:15:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:15:11,607 INFO L93 Difference]: Finished difference Result 4462 states and 5539 transitions. [2020-08-21 16:15:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:15:11,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-21 16:15:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:15:11,619 INFO L225 Difference]: With dead ends: 4462 [2020-08-21 16:15:11,620 INFO L226 Difference]: Without dead ends: 1751 [2020-08-21 16:15:11,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:15:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2020-08-21 16:15:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1454. [2020-08-21 16:15:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1454 states. [2020-08-21 16:15:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1782 transitions. [2020-08-21 16:15:11,752 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1782 transitions. Word has length 150 [2020-08-21 16:15:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:15:11,753 INFO L479 AbstractCegarLoop]: Abstraction has 1454 states and 1782 transitions. [2020-08-21 16:15:11,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:15:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1782 transitions. [2020-08-21 16:15:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 16:15:11,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:15:11,758 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:15:11,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:15:11,758 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:15:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:15:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1808070535, now seen corresponding path program 2 times [2020-08-21 16:15:11,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:15:11,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782726104] [2020-08-21 16:15:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:15:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:15:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:15:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:11,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:15:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 16:15:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:15:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 16:15:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 16:15:12,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-21 16:15:12,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782726104] [2020-08-21 16:15:12,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:15:12,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 16:15:12,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674721970] [2020-08-21 16:15:12,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:15:12,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:15:12,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:15:12,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:15:12,238 INFO L87 Difference]: Start difference. First operand 1454 states and 1782 transitions. Second operand 10 states. [2020-08-21 16:15:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:15:14,906 INFO L93 Difference]: Finished difference Result 2489 states and 3208 transitions. [2020-08-21 16:15:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:15:14,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-21 16:15:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:15:14,919 INFO L225 Difference]: With dead ends: 2489 [2020-08-21 16:15:14,920 INFO L226 Difference]: Without dead ends: 1716 [2020-08-21 16:15:14,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:15:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-08-21 16:15:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1458. [2020-08-21 16:15:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2020-08-21 16:15:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1786 transitions. [2020-08-21 16:15:15,114 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1786 transitions. Word has length 150 [2020-08-21 16:15:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:15:15,116 INFO L479 AbstractCegarLoop]: Abstraction has 1458 states and 1786 transitions. [2020-08-21 16:15:15,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:15:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1786 transitions. [2020-08-21 16:15:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 16:15:15,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:15:15,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:15:15,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:15:15,123 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:15:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:15:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash 464652536, now seen corresponding path program 1 times [2020-08-21 16:15:15,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:15:15,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797627195] [2020-08-21 16:15:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:15:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:15:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:15:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:15:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 16:15:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:15:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-21 16:15:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-21 16:15:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-21 16:15:15,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797627195] [2020-08-21 16:15:15,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:15:15,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 16:15:15,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108411748] [2020-08-21 16:15:15,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:15:15,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:15:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:15:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:15:15,752 INFO L87 Difference]: Start difference. First operand 1458 states and 1786 transitions. Second operand 13 states. [2020-08-21 16:15:15,866 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-08-21 16:15:17,623 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-08-21 16:15:18,821 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-08-21 16:15:19,054 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-08-21 16:15:23,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:15:23,251 INFO L93 Difference]: Finished difference Result 3355 states and 4229 transitions. [2020-08-21 16:15:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 16:15:23,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 152 [2020-08-21 16:15:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:15:23,265 INFO L225 Difference]: With dead ends: 3355 [2020-08-21 16:15:23,265 INFO L226 Difference]: Without dead ends: 1940 [2020-08-21 16:15:23,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2020-08-21 16:15:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2020-08-21 16:15:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1444. [2020-08-21 16:15:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-08-21 16:15:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1724 transitions. [2020-08-21 16:15:23,487 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1724 transitions. Word has length 152 [2020-08-21 16:15:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:15:23,488 INFO L479 AbstractCegarLoop]: Abstraction has 1444 states and 1724 transitions. [2020-08-21 16:15:23,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:15:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1724 transitions. [2020-08-21 16:15:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-08-21 16:15:23,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:15:23,498 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:15:23,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:15:23,498 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:15:23,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:15:23,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1292040904, now seen corresponding path program 1 times [2020-08-21 16:15:23,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:15:23,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438204837] [2020-08-21 16:15:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:15:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,869 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-08-21 16:15:23,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 16:15:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 16:15:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:23,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 16:15:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 16:15:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 16:15:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 16:15:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 16:15:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 16:15:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 16:15:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 16:15:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 16:15:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 16:15:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-21 16:15:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:15:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-21 16:15:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:15:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-08-21 16:15:24,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438204837] [2020-08-21 16:15:24,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:15:24,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 16:15:24,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541994509] [2020-08-21 16:15:24,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:15:24,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:15:24,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:15:24,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:15:24,900 INFO L87 Difference]: Start difference. First operand 1444 states and 1724 transitions. Second operand 15 states. [2020-08-21 16:15:25,072 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-08-21 16:15:25,483 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-08-21 16:15:25,907 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-08-21 16:15:27,701 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-08-21 16:15:29,147 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-08-21 16:15:29,376 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-08-21 16:15:34,143 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-08-21 16:15:34,384 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-08-21 16:15:34,622 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 101