/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 false -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 13:49:52,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:49:52,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:49:52,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:49:52,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:49:52,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:49:52,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:49:52,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:49:52,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:49:52,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:49:52,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:49:52,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:49:52,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:49:52,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:49:52,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:49:52,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:49:52,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:49:52,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:49:52,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:49:52,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:49:52,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:49:52,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:49:52,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:49:52,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:49:52,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:49:52,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:49:52,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:49:52,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:49:52,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:49:52,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:49:52,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:49:52,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:49:52,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:49:52,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:49:52,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:49:52,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:49:52,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:49:52,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:49:52,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:49:52,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:49:52,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:49:52,243 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 13:49:52,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:49:52,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:49:52,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:49:52,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:49:52,291 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:49:52,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:49:52,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:49:52,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:49:52,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:49:52,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:49:52,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:49:52,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:49:52,294 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:49:52,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:49:52,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:49:52,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:49:52,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:49:52,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:49:52,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:49:52,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:49:52,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:49:52,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:49:52,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:49:52,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:49:52,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:49:52,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:49:52,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-21 13:49:52,297 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 -> false [2020-08-21 13:49:52,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:49:52,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:49:52,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:49:52,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:49:52,632 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:49:52,632 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-21 13:49:52,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81aad208/3fa70d755ff34228a9619edac6138f4b/FLAGb1d02d845 [2020-08-21 13:49:53,500 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:49:53,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-21 13:49:53,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81aad208/3fa70d755ff34228a9619edac6138f4b/FLAGb1d02d845 [2020-08-21 13:49:54,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81aad208/3fa70d755ff34228a9619edac6138f4b [2020-08-21 13:49:54,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:49:54,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:49:54,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:49:54,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:49:54,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:49:54,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:49:54" (1/1) ... [2020-08-21 13:49:54,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461dafa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:54, skipping insertion in model container [2020-08-21 13:49:54,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:49:54" (1/1) ... [2020-08-21 13:49:54,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:49:54,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:49:55,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:49:55,421 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:49:55,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:49:55,827 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:49:55,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55 WrapperNode [2020-08-21 13:49:55,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:49:55,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:49:55,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:49:55,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:49:55,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:55,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:55,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:55,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:55,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:55,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:56,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (1/1) ... [2020-08-21 13:49:56,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:49:56,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:49:56,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:49:56,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:49:56,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (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 13:49:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:49:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:49:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~~netdev_tx_t~0 [2020-08-21 13:49:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-08-21 13:49:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2020-08-21 13:49:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2020-08-21 13:49:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2020-08-21 13:49:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cloned [2020-08-21 13:49:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_shared [2020-08-21 13:49:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_share_check [2020-08-21 13:49:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2020-08-21 13:49:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2020-08-21 13:49:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_cow [2020-08-21 13:49:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cow [2020-08-21 13:49:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 13:49:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_zalloc [2020-08-21 13:49:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-21 13:49:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-21 13:49:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-21 13:49:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-21 13:49:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-21 13:49:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-21 13:49:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-21 13:49:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_dormant_off [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connect_disconnect [2020-08-21 13:49:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connected [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_disconnected [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_data_indication [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_data_transmit [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_xmit [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_open [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_close [2020-08-21 13:49:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_rx [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_ioctl [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_init [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_exit [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_hdlc_proto_1 [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2020-08-21 13:49:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_13 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_14 [2020-08-21 13:49:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2020-08-21 13:49:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2020-08-21 13:49:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2020-08-21 13:49:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2020-08-21 13:49:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2020-08-21 13:49:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-08-21 13:49:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-08-21 13:49:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-08-21 13:49:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-08-21 13:49:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2020-08-21 13:49:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-21 13:49:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2020-08-21 13:49:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_any [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2020-08-21 13:49:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure attach_hdlc_protocol [2020-08-21 13:49:56,175 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2020-08-21 13:49:56,175 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_connect_request [2020-08-21 13:49:56,175 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_data_received [2020-08-21 13:49:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_data_request [2020-08-21 13:49:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_disconnect_request [2020-08-21 13:49:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_register [2020-08-21 13:49:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_unregister [2020-08-21 13:49:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure linkwatch_fire_event [2020-08-21 13:49:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2020-08-21 13:49:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure pskb_expand_head [2020-08-21 13:49:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure register_hdlc_protocol [2020-08-21 13:49:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_clone [2020-08-21 13:49:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2020-08-21 13:49:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2020-08-21 13:49:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2020-08-21 13:49:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_hdlc_protocol [2020-08-21 13:49:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-21 13:49:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 13:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-21 13:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2020-08-21 13:49:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2020-08-21 13:49:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure skb_clone [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure pskb_expand_head [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cloned [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure skb_shared [2020-08-21 13:49:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure skb_share_check [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2020-08-21 13:49:56,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_cow [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cow [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2020-08-21 13:49:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_zalloc [2020-08-21 13:49:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 13:49:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 13:49:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-21 13:49:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-21 13:49:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-21 13:49:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-21 13:49:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_hdlc_proto_1 [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_any [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2020-08-21 13:49:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_13 [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_14 [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure linkwatch_fire_event [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure netif_dormant_off [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure register_hdlc_protocol [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_hdlc_protocol [2020-08-21 13:49:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure attach_hdlc_protocol [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_register [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_unregister [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_connect_request [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_disconnect_request [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_data_request [2020-08-21 13:49:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_data_received [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure x25_ioctl [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connect_disconnect [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connected [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure x25_disconnected [2020-08-21 13:49:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure x25_data_indication [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure x25_data_transmit [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~~netdev_tx_t~0 [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure x25_xmit [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure x25_open [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure x25_close [2020-08-21 13:49:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure x25_rx [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure mod_init [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure mod_exit [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2020-08-21 13:49:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-08-21 13:49:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:49:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 13:49:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:49:56,814 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-21 13:49:57,708 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:49:57,708 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 13:49:57,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:49:57 BoogieIcfgContainer [2020-08-21 13:49:57,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:49:57,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:49:57,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:49:57,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:49:57,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:49:54" (1/3) ... [2020-08-21 13:49:57,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500c71f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:49:57, skipping insertion in model container [2020-08-21 13:49:57,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:49:55" (2/3) ... [2020-08-21 13:49:57,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500c71f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:49:57, skipping insertion in model container [2020-08-21 13:49:57,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:49:57" (3/3) ... [2020-08-21 13:49:57,730 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 13:49:57,741 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:49:57,750 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:49:57,765 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:49:57,803 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:49:57,804 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:49:57,804 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:49:57,805 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:49:57,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:49:57,806 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:49:57,806 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:49:57,806 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:49:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states. [2020-08-21 13:49:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 13:49:57,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:49:57,852 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 13:49:57,852 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:49:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:49:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash 856791813, now seen corresponding path program 1 times [2020-08-21 13:49:57,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:49:57,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973101533] [2020-08-21 13:49:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:49:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,388 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-08-21 13:49:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:49:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:49:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:49:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:49:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:49:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:49:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 13:49:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:49:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 13:49:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:49:58,552 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 13:49:58,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973101533] [2020-08-21 13:49:58,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:49:58,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 13:49:58,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674788474] [2020-08-21 13:49:58,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:49:58,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:49:58,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:49:58,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:49:58,587 INFO L87 Difference]: Start difference. First operand 477 states. Second operand 7 states. [2020-08-21 13:50:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:03,642 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-08-21 13:50:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:50:03,644 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-08-21 13:50:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:03,677 INFO L225 Difference]: With dead ends: 1386 [2020-08-21 13:50:03,677 INFO L226 Difference]: Without dead ends: 987 [2020-08-21 13:50:03,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:50:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-08-21 13:50:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 703. [2020-08-21 13:50:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-08-21 13:50:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 843 transitions. [2020-08-21 13:50:03,892 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 843 transitions. Word has length 54 [2020-08-21 13:50:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:03,893 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 843 transitions. [2020-08-21 13:50:03,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:50:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 843 transitions. [2020-08-21 13:50:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 13:50:03,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:03,898 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 13:50:03,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:50:03,899 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 226580861, now seen corresponding path program 1 times [2020-08-21 13:50:03,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:03,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550901861] [2020-08-21 13:50:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 13:50:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:04,167 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 13:50:04,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550901861] [2020-08-21 13:50:04,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:04,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 13:50:04,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955192060] [2020-08-21 13:50:04,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:50:04,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:04,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:50:04,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:50:04,172 INFO L87 Difference]: Start difference. First operand 703 states and 843 transitions. Second operand 9 states. [2020-08-21 13:50:04,461 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-08-21 13:50:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:07,706 INFO L93 Difference]: Finished difference Result 1673 states and 2071 transitions. [2020-08-21 13:50:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:50:07,707 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-21 13:50:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:07,715 INFO L225 Difference]: With dead ends: 1673 [2020-08-21 13:50:07,715 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 13:50:07,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:50:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 13:50:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 702. [2020-08-21 13:50:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-21 13:50:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 839 transitions. [2020-08-21 13:50:07,824 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 839 transitions. Word has length 58 [2020-08-21 13:50:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:07,825 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 839 transitions. [2020-08-21 13:50:07,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:50:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 839 transitions. [2020-08-21 13:50:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-21 13:50:07,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:07,840 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 13:50:07,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:50:07,840 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1087478551, now seen corresponding path program 1 times [2020-08-21 13:50:07,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:07,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392357806] [2020-08-21 13:50:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:50:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 13:50:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 13:50:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:08,371 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 13:50:08,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392357806] [2020-08-21 13:50:08,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:08,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 13:50:08,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453874893] [2020-08-21 13:50:08,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:50:08,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:50:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:50:08,374 INFO L87 Difference]: Start difference. First operand 702 states and 839 transitions. Second operand 11 states. [2020-08-21 13:50:13,992 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-08-21 13:50:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:14,414 INFO L93 Difference]: Finished difference Result 2445 states and 3129 transitions. [2020-08-21 13:50:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:50:14,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-08-21 13:50:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:14,432 INFO L225 Difference]: With dead ends: 2445 [2020-08-21 13:50:14,433 INFO L226 Difference]: Without dead ends: 1743 [2020-08-21 13:50:14,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:50:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2020-08-21 13:50:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1469. [2020-08-21 13:50:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-08-21 13:50:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1818 transitions. [2020-08-21 13:50:14,590 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1818 transitions. Word has length 108 [2020-08-21 13:50:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:14,591 INFO L479 AbstractCegarLoop]: Abstraction has 1469 states and 1818 transitions. [2020-08-21 13:50:14,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:50:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1818 transitions. [2020-08-21 13:50:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 13:50:14,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:14,599 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 13:50:14,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:50:14,600 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1453768121, now seen corresponding path program 1 times [2020-08-21 13:50:14,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:14,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373150346] [2020-08-21 13:50:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,849 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-08-21 13:50:14,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:50:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:14,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 13:50:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 13:50:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 13:50:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 13:50:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:15,199 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 13:50:15,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373150346] [2020-08-21 13:50:15,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:15,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:50:15,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188653786] [2020-08-21 13:50:15,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:50:15,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:50:15,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:50:15,205 INFO L87 Difference]: Start difference. First operand 1469 states and 1818 transitions. Second operand 10 states. [2020-08-21 13:50:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:20,363 INFO L93 Difference]: Finished difference Result 4737 states and 6006 transitions. [2020-08-21 13:50:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:50:20,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-21 13:50:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:20,387 INFO L225 Difference]: With dead ends: 4737 [2020-08-21 13:50:20,388 INFO L226 Difference]: Without dead ends: 3284 [2020-08-21 13:50:20,394 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 13:50:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2020-08-21 13:50:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2727. [2020-08-21 13:50:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-08-21 13:50:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3337 transitions. [2020-08-21 13:50:20,643 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3337 transitions. Word has length 150 [2020-08-21 13:50:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:20,644 INFO L479 AbstractCegarLoop]: Abstraction has 2727 states and 3337 transitions. [2020-08-21 13:50:20,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:50:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3337 transitions. [2020-08-21 13:50:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 13:50:20,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:20,653 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 13:50:20,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:50:20,653 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:20,654 INFO L82 PathProgramCache]: Analyzing trace with hash 385849721, now seen corresponding path program 1 times [2020-08-21 13:50:20,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:20,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114507143] [2020-08-21 13:50:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 13:50:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 13:50:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 13:50:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:20,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 13:50:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 13:50:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 13:50:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:21,198 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 13:50:21,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114507143] [2020-08-21 13:50:21,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:21,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:50:21,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361663344] [2020-08-21 13:50:21,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:50:21,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:50:21,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:50:21,201 INFO L87 Difference]: Start difference. First operand 2727 states and 3337 transitions. Second operand 10 states. [2020-08-21 13:50:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:24,616 INFO L93 Difference]: Finished difference Result 4462 states and 5539 transitions. [2020-08-21 13:50:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:50:24,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-21 13:50:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:24,629 INFO L225 Difference]: With dead ends: 4462 [2020-08-21 13:50:24,629 INFO L226 Difference]: Without dead ends: 1751 [2020-08-21 13:50:24,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:50:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2020-08-21 13:50:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1454. [2020-08-21 13:50:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1454 states. [2020-08-21 13:50:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1782 transitions. [2020-08-21 13:50:24,773 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1782 transitions. Word has length 150 [2020-08-21 13:50:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:24,774 INFO L479 AbstractCegarLoop]: Abstraction has 1454 states and 1782 transitions. [2020-08-21 13:50:24,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:50:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1782 transitions. [2020-08-21 13:50:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-21 13:50:24,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:24,781 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 13:50:24,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:50:24,781 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1808070535, now seen corresponding path program 2 times [2020-08-21 13:50:24,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:24,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100387350] [2020-08-21 13:50:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:50:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 13:50:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 13:50:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 13:50:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 13:50:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:25,319 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 13:50:25,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100387350] [2020-08-21 13:50:25,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:25,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 13:50:25,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943270643] [2020-08-21 13:50:25,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:50:25,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:50:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:50:25,323 INFO L87 Difference]: Start difference. First operand 1454 states and 1782 transitions. Second operand 10 states. [2020-08-21 13:50:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:27,827 INFO L93 Difference]: Finished difference Result 2489 states and 3208 transitions. [2020-08-21 13:50:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 13:50:27,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-21 13:50:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:27,842 INFO L225 Difference]: With dead ends: 2489 [2020-08-21 13:50:27,842 INFO L226 Difference]: Without dead ends: 1716 [2020-08-21 13:50:27,846 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 13:50:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-08-21 13:50:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1458. [2020-08-21 13:50:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2020-08-21 13:50:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1786 transitions. [2020-08-21 13:50:27,986 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1786 transitions. Word has length 150 [2020-08-21 13:50:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:27,987 INFO L479 AbstractCegarLoop]: Abstraction has 1458 states and 1786 transitions. [2020-08-21 13:50:27,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:50:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1786 transitions. [2020-08-21 13:50:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-21 13:50:27,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:27,992 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 13:50:27,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:50:27,992 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash 464652536, now seen corresponding path program 1 times [2020-08-21 13:50:27,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:27,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917137202] [2020-08-21 13:50:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:50:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 13:50:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 13:50:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-21 13:50:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-21 13:50:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:28,572 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 13:50:28,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917137202] [2020-08-21 13:50:28,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:28,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 13:50:28,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338580519] [2020-08-21 13:50:28,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:50:28,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:50:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:50:28,575 INFO L87 Difference]: Start difference. First operand 1458 states and 1786 transitions. Second operand 13 states. [2020-08-21 13:50:30,367 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-08-21 13:50:31,569 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-08-21 13:50:31,780 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-08-21 13:50:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:35,093 INFO L93 Difference]: Finished difference Result 3355 states and 4229 transitions. [2020-08-21 13:50:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:50:35,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 152 [2020-08-21 13:50:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:35,105 INFO L225 Difference]: With dead ends: 3355 [2020-08-21 13:50:35,105 INFO L226 Difference]: Without dead ends: 1940 [2020-08-21 13:50:35,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:50:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2020-08-21 13:50:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1444. [2020-08-21 13:50:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-08-21 13:50:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1724 transitions. [2020-08-21 13:50:35,249 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1724 transitions. Word has length 152 [2020-08-21 13:50:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:35,249 INFO L479 AbstractCegarLoop]: Abstraction has 1444 states and 1724 transitions. [2020-08-21 13:50:35,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:50:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1724 transitions. [2020-08-21 13:50:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-08-21 13:50:35,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:35,255 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 13:50:35,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:50:35,256 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:35,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1292040904, now seen corresponding path program 1 times [2020-08-21 13:50:35,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:35,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798785328] [2020-08-21 13:50:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:50:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 13:50:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 13:50:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:50:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:50:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:50:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 13:50:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:35,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:36,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-21 13:50:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:36,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:36,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-21 13:50:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:36,100 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 13:50:36,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798785328] [2020-08-21 13:50:36,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:36,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-21 13:50:36,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385653980] [2020-08-21 13:50:36,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:50:36,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:50:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:50:36,103 INFO L87 Difference]: Start difference. First operand 1444 states and 1724 transitions. Second operand 15 states. [2020-08-21 13:50:36,366 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-08-21 13:50:36,560 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-08-21 13:50:38,182 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-08-21 13:50:39,546 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-08-21 13:50:39,742 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-08-21 13:50:44,134 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-08-21 13:50:44,355 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-08-21 13:50:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:50:47,560 INFO L93 Difference]: Finished difference Result 3441 states and 4458 transitions. [2020-08-21 13:50:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 13:50:47,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-08-21 13:50:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:50:47,577 INFO L225 Difference]: With dead ends: 3441 [2020-08-21 13:50:47,577 INFO L226 Difference]: Without dead ends: 2674 [2020-08-21 13:50:47,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 13:50:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2020-08-21 13:50:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1764. [2020-08-21 13:50:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2020-08-21 13:50:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2110 transitions. [2020-08-21 13:50:47,898 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2110 transitions. Word has length 197 [2020-08-21 13:50:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:50:47,899 INFO L479 AbstractCegarLoop]: Abstraction has 1764 states and 2110 transitions. [2020-08-21 13:50:47,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:50:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2110 transitions. [2020-08-21 13:50:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-21 13:50:47,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:50:47,906 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, 1, 1] [2020-08-21 13:50:47,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:50:47,906 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:50:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:50:47,907 INFO L82 PathProgramCache]: Analyzing trace with hash -340207207, now seen corresponding path program 1 times [2020-08-21 13:50:47,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:50:47,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169088514] [2020-08-21 13:50:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:50:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 13:50:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:50:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:50:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 13:50:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 13:50:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 13:50:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 13:50:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:50:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 13:50:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-21 13:50:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 13:50:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 13:50:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-21 13:50:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:50:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-08-21 13:50:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:50:48,493 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 13:50:48,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169088514] [2020-08-21 13:50:48,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:50:48,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 13:50:48,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31650782] [2020-08-21 13:50:48,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:50:48,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:50:48,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:50:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:50:48,498 INFO L87 Difference]: Start difference. First operand 1764 states and 2110 transitions. Second operand 11 states.