/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:18:34,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:18:34,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:18:34,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:18:34,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:18:34,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:18:34,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:18:34,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:18:34,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:18:34,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:18:34,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:18:34,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:18:34,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:18:34,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:18:34,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:18:34,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:18:34,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:18:34,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:18:34,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:18:34,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:18:34,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:18:34,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:18:34,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:18:34,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:18:34,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 00:18:34,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 00:18:34,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 00:18:34,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 00:18:34,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 00:18:34,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 00:18:34,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 00:18:34,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 00:18:34,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 00:18:34,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 00:18:34,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 00:18:34,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 00:18:34,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 00:18:34,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 00:18:34,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:18:34,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:18:34,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:18:34,220 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 [2020-08-22 00:18:34,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:18:34,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:18:34,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:18:34,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:18:34,260 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:18:34,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:18:34,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:18:34,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:18:34,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:18:34,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:18:34,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:18:34,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:18:34,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:18:34,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:18:34,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:18:34,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:18:34,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:18:34,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:18:34,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:18:34,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:18:34,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:18:34,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:18:34,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:18:34,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:18:34,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:18:34,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:18:34,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 00:18:34,266 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-22 00:18:34,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:18:34,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:18:34,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:18:34,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:18:34,603 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:18:34,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-22 00:18:34,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17f472bb4/626ee2a5ee0f4da68bae70aaf5823bc8/FLAG0e9d0b4b0 [2020-08-22 00:18:35,439 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:18:35,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_x25.ko-entry_point.cil.out.i [2020-08-22 00:18:35,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17f472bb4/626ee2a5ee0f4da68bae70aaf5823bc8/FLAG0e9d0b4b0 [2020-08-22 00:18:35,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17f472bb4/626ee2a5ee0f4da68bae70aaf5823bc8 [2020-08-22 00:18:35,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:18:35,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:18:35,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:18:35,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:18:35,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:18:35,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:18:35" (1/1) ... [2020-08-22 00:18:35,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d59cf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:35, skipping insertion in model container [2020-08-22 00:18:35,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:18:35" (1/1) ... [2020-08-22 00:18:35,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:18:35,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:18:36,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:18:36,749 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:18:37,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:18:37,101 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:18:37,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37 WrapperNode [2020-08-22 00:18:37,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:18:37,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:18:37,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:18:37,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:18:37,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (1/1) ... [2020-08-22 00:18:37,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:18:37,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:18:37,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:18:37,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:18:37,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (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 [2020-08-22 00:18:37,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:18:37,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:18:37,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~~netdev_tx_t~0 [2020-08-22 00:18:37,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-08-22 00:18:37,418 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2020-08-22 00:18:37,418 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2020-08-22 00:18:37,419 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2020-08-22 00:18:37,419 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cloned [2020-08-22 00:18:37,420 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_shared [2020-08-22 00:18:37,420 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_share_check [2020-08-22 00:18:37,420 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2020-08-22 00:18:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2020-08-22 00:18:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __skb_cow [2020-08-22 00:18:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cow [2020-08-22 00:18:37,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 00:18:37,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_zalloc [2020-08-22 00:18:37,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-22 00:18:37,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-22 00:18:37,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-22 00:18:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-22 00:18:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-22 00:18:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-22 00:18:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2020-08-22 00:18:37,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2020-08-22 00:18:37,426 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-08-22 00:18:37,426 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2020-08-22 00:18:37,426 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_dormant_off [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connect_disconnect [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_connected [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_disconnected [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_data_indication [2020-08-22 00:18:37,427 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_data_transmit [2020-08-22 00:18:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_xmit [2020-08-22 00:18:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_open [2020-08-22 00:18:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_close [2020-08-22 00:18:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_rx [2020-08-22 00:18:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_ioctl [2020-08-22 00:18:37,428 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_init [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_exit [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_hdlc_proto_1 [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2020-08-22 00:18:37,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_13 [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_14 [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2020-08-22 00:18:37,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2020-08-22 00:18:37,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2020-08-22 00:18:37,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2020-08-22 00:18:37,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-08-22 00:18:37,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-08-22 00:18:37,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-08-22 00:18:37,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-08-22 00:18:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2020-08-22 00:18:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-22 00:18:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2020-08-22 00:18:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2020-08-22 00:18:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2020-08-22 00:18:37,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_any [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure attach_hdlc_protocol [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2020-08-22 00:18:37,434 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_connect_request [2020-08-22 00:18:37,436 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_data_received [2020-08-22 00:18:37,437 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_data_request [2020-08-22 00:18:37,437 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_disconnect_request [2020-08-22 00:18:37,438 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_register [2020-08-22 00:18:37,438 INFO L138 BoogieDeclarations]: Found implementation of procedure lapb_unregister [2020-08-22 00:18:37,438 INFO L138 BoogieDeclarations]: Found implementation of procedure linkwatch_fire_event [2020-08-22 00:18:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2020-08-22 00:18:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure pskb_expand_head [2020-08-22 00:18:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure register_hdlc_protocol [2020-08-22 00:18:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_clone [2020-08-22 00:18:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2020-08-22 00:18:37,439 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2020-08-22 00:18:37,440 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2020-08-22 00:18:37,440 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_hdlc_protocol [2020-08-22 00:18:37,441 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-22 00:18:37,441 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-22 00:18:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:18:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2020-08-22 00:18:37,441 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2020-08-22 00:18:37,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure skb_clone [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure pskb_expand_head [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 00:18:37,443 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cloned [2020-08-22 00:18:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure skb_shared [2020-08-22 00:18:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure skb_share_check [2020-08-22 00:18:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 00:18:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2020-08-22 00:18:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2020-08-22 00:18:37,444 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2020-08-22 00:18:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2020-08-22 00:18:37,445 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2020-08-22 00:18:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 00:18:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2020-08-22 00:18:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure __skb_cow [2020-08-22 00:18:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cow [2020-08-22 00:18:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2020-08-22 00:18:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2020-08-22 00:18:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2020-08-22 00:18:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 00:18:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 00:18:37,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:18:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-22 00:18:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 00:18:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 00:18:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_zalloc [2020-08-22 00:18:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 00:18:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-22 00:18:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-22 00:18:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-22 00:18:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-22 00:18:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-22 00:18:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-22 00:18:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-22 00:18:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2020-08-22 00:18:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_hdlc_proto_1 [2020-08-22 00:18:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-08-22 00:18:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_any [2020-08-22 00:18:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2020-08-22 00:18:37,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_13 [2020-08-22 00:18:37,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_14 [2020-08-22 00:18:37,459 INFO L130 BoogieDeclarations]: Found specification of procedure linkwatch_fire_event [2020-08-22 00:18:37,460 INFO L130 BoogieDeclarations]: Found specification of procedure netif_dormant_off [2020-08-22 00:18:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2020-08-22 00:18:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure register_hdlc_protocol [2020-08-22 00:18:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_hdlc_protocol [2020-08-22 00:18:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2020-08-22 00:18:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure attach_hdlc_protocol [2020-08-22 00:18:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_register [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_unregister [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_connect_request [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_disconnect_request [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_data_request [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure lapb_data_received [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 00:18:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure x25_ioctl [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connect_disconnect [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure x25_connected [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure x25_disconnected [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure x25_data_indication [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure x25_data_transmit [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~~netdev_tx_t~0 [2020-08-22 00:18:37,467 INFO L130 BoogieDeclarations]: Found specification of procedure x25_xmit [2020-08-22 00:18:37,468 INFO L130 BoogieDeclarations]: Found specification of procedure x25_open [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure x25_close [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure x25_rx [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure mod_init [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure mod_exit [2020-08-22 00:18:37,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2020-08-22 00:18:37,470 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-08-22 00:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-08-22 00:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-08-22 00:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-08-22 00:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2020-08-22 00:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2020-08-22 00:18:37,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2020-08-22 00:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 00:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 00:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-22 00:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-22 00:18:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:18:38,005 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-22 00:18:38,786 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:18:38,786 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 00:18:38,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:18:38 BoogieIcfgContainer [2020-08-22 00:18:38,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:18:38,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:18:38,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:18:38,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:18:38,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:18:35" (1/3) ... [2020-08-22 00:18:38,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f1653c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:18:38, skipping insertion in model container [2020-08-22 00:18:38,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:18:37" (2/3) ... [2020-08-22 00:18:38,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f1653c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:18:38, skipping insertion in model container [2020-08-22 00:18:38,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:18:38" (3/3) ... [2020-08-22 00:18:38,801 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 [2020-08-22 00:18:38,811 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:18:38,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:18:38,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:18:38,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:18:38,865 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:18:38,865 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:18:38,865 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:18:38,866 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:18:38,866 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:18:38,866 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:18:38,866 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:18:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states. [2020-08-22 00:18:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 00:18:38,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:18:38,907 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] [2020-08-22 00:18:38,907 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:18:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:18:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash 856791813, now seen corresponding path program 1 times [2020-08-22 00:18:38,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:18:38,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190176084] [2020-08-22 00:18:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:18:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:18:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 00:18:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 00:18:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:18:39,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190176084] [2020-08-22 00:18:39,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:18:39,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 00:18:39,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914666844] [2020-08-22 00:18:39,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:18:39,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:18:39,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:18:39,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:18:39,600 INFO L87 Difference]: Start difference. First operand 477 states. Second operand 7 states. [2020-08-22 00:18:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:18:44,403 INFO L93 Difference]: Finished difference Result 1386 states and 1837 transitions. [2020-08-22 00:18:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:18:44,408 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-08-22 00:18:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:18:44,433 INFO L225 Difference]: With dead ends: 1386 [2020-08-22 00:18:44,434 INFO L226 Difference]: Without dead ends: 987 [2020-08-22 00:18:44,443 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 [2020-08-22 00:18:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-08-22 00:18:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 703. [2020-08-22 00:18:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-08-22 00:18:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 843 transitions. [2020-08-22 00:18:44,638 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 843 transitions. Word has length 54 [2020-08-22 00:18:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:18:44,638 INFO L479 AbstractCegarLoop]: Abstraction has 703 states and 843 transitions. [2020-08-22 00:18:44,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:18:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 843 transitions. [2020-08-22 00:18:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 00:18:44,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:18:44,643 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] [2020-08-22 00:18:44,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:18:44,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:18:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:18:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash 226580861, now seen corresponding path program 1 times [2020-08-22 00:18:44,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:18:44,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67671718] [2020-08-22 00:18:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:18:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:18:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:18:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 00:18:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:18:44,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67671718] [2020-08-22 00:18:44,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:18:44,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 00:18:44,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67576347] [2020-08-22 00:18:44,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:18:44,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:18:44,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:18:44,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:18:44,952 INFO L87 Difference]: Start difference. First operand 703 states and 843 transitions. Second operand 9 states. [2020-08-22 00:18:45,072 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-08-22 00:18:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:18:48,350 INFO L93 Difference]: Finished difference Result 1673 states and 2071 transitions. [2020-08-22 00:18:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 00:18:48,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-08-22 00:18:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:18:48,362 INFO L225 Difference]: With dead ends: 1673 [2020-08-22 00:18:48,363 INFO L226 Difference]: Without dead ends: 986 [2020-08-22 00:18:48,366 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 [2020-08-22 00:18:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-22 00:18:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 702. [2020-08-22 00:18:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-22 00:18:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 839 transitions. [2020-08-22 00:18:48,493 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 839 transitions. Word has length 58 [2020-08-22 00:18:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:18:48,493 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 839 transitions. [2020-08-22 00:18:48,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:18:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 839 transitions. [2020-08-22 00:18:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 00:18:48,500 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:18:48,501 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] [2020-08-22 00:18:48,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:18:48,502 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:18:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:18:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1087478551, now seen corresponding path program 1 times [2020-08-22 00:18:48,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:18:48,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453359973] [2020-08-22 00:18:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:18:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:18:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:18:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:18:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:18:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 00:18:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 00:18:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-08-22 00:18:48,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453359973] [2020-08-22 00:18:48,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:18:48,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 00:18:48,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337602498] [2020-08-22 00:18:48,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 00:18:48,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:18:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 00:18:49,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:18:49,000 INFO L87 Difference]: Start difference. First operand 702 states and 839 transitions. Second operand 11 states. [2020-08-22 00:18:54,651 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-08-22 00:18:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:18:55,072 INFO L93 Difference]: Finished difference Result 2445 states and 3129 transitions. [2020-08-22 00:18:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 00:18:55,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-08-22 00:18:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:18:55,085 INFO L225 Difference]: With dead ends: 2445 [2020-08-22 00:18:55,085 INFO L226 Difference]: Without dead ends: 1743 [2020-08-22 00:18:55,088 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 [2020-08-22 00:18:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2020-08-22 00:18:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1469. [2020-08-22 00:18:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-08-22 00:18:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1818 transitions. [2020-08-22 00:18:55,234 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1818 transitions. Word has length 108 [2020-08-22 00:18:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:18:55,234 INFO L479 AbstractCegarLoop]: Abstraction has 1469 states and 1818 transitions. [2020-08-22 00:18:55,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 00:18:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1818 transitions. [2020-08-22 00:18:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 00:18:55,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:18:55,242 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] [2020-08-22 00:18:55,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:18:55,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:18:55,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:18:55,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1453768121, now seen corresponding path program 1 times [2020-08-22 00:18:55,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:18:55,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380236239] [2020-08-22 00:18:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:18:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,449 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-08-22 00:18:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:18:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:18:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:18:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:18:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:18:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 00:18:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 00:18:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:18:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:18:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 00:18:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:18:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 00:18:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:18:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-22 00:18:55,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380236239] [2020-08-22 00:18:55,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:18:55,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 00:18:55,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637583143] [2020-08-22 00:18:55,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:18:55,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:18:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:18:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:18:55,712 INFO L87 Difference]: Start difference. First operand 1469 states and 1818 transitions. Second operand 10 states. [2020-08-22 00:19:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:19:00,798 INFO L93 Difference]: Finished difference Result 4737 states and 6006 transitions. [2020-08-22 00:19:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:19:00,799 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-22 00:19:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:19:00,822 INFO L225 Difference]: With dead ends: 4737 [2020-08-22 00:19:00,823 INFO L226 Difference]: Without dead ends: 3284 [2020-08-22 00:19:00,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:19:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2020-08-22 00:19:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2727. [2020-08-22 00:19:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-08-22 00:19:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3337 transitions. [2020-08-22 00:19:01,080 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3337 transitions. Word has length 150 [2020-08-22 00:19:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:19:01,081 INFO L479 AbstractCegarLoop]: Abstraction has 2727 states and 3337 transitions. [2020-08-22 00:19:01,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:19:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3337 transitions. [2020-08-22 00:19:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 00:19:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:19:01,089 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] [2020-08-22 00:19:01,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:19:01,089 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:19:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:19:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 385849721, now seen corresponding path program 1 times [2020-08-22 00:19:01,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:19:01,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691736412] [2020-08-22 00:19:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:19:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:19:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 00:19:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 00:19:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 00:19:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:19:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 00:19:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 00:19:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-08-22 00:19:01,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691736412] [2020-08-22 00:19:01,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:19:01,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 00:19:01,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371020866] [2020-08-22 00:19:01,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:19:01,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:19:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:19:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:19:01,453 INFO L87 Difference]: Start difference. First operand 2727 states and 3337 transitions. Second operand 10 states. [2020-08-22 00:19:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:19:04,808 INFO L93 Difference]: Finished difference Result 4462 states and 5539 transitions. [2020-08-22 00:19:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:19:04,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-22 00:19:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:19:04,819 INFO L225 Difference]: With dead ends: 4462 [2020-08-22 00:19:04,819 INFO L226 Difference]: Without dead ends: 1751 [2020-08-22 00:19:04,826 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 [2020-08-22 00:19:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2020-08-22 00:19:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1454. [2020-08-22 00:19:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1454 states. [2020-08-22 00:19:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 1782 transitions. [2020-08-22 00:19:04,958 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 1782 transitions. Word has length 150 [2020-08-22 00:19:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:19:04,959 INFO L479 AbstractCegarLoop]: Abstraction has 1454 states and 1782 transitions. [2020-08-22 00:19:04,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:19:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 1782 transitions. [2020-08-22 00:19:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 00:19:04,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:19:04,967 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] [2020-08-22 00:19:04,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:19:04,968 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:19:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:19:04,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1808070535, now seen corresponding path program 2 times [2020-08-22 00:19:04,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:19:04,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669881839] [2020-08-22 00:19:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:19:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:19:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:19:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:19:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:19:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 00:19:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 00:19:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 00:19:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-22 00:19:05,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669881839] [2020-08-22 00:19:05,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:19:05,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 00:19:05,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991082247] [2020-08-22 00:19:05,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:19:05,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:19:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:19:05,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:19:05,451 INFO L87 Difference]: Start difference. First operand 1454 states and 1782 transitions. Second operand 10 states. [2020-08-22 00:19:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:19:07,937 INFO L93 Difference]: Finished difference Result 2489 states and 3208 transitions. [2020-08-22 00:19:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 00:19:07,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 150 [2020-08-22 00:19:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:19:07,951 INFO L225 Difference]: With dead ends: 2489 [2020-08-22 00:19:07,951 INFO L226 Difference]: Without dead ends: 1716 [2020-08-22 00:19:07,955 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 [2020-08-22 00:19:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2020-08-22 00:19:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1458. [2020-08-22 00:19:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1458 states. [2020-08-22 00:19:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1786 transitions. [2020-08-22 00:19:08,103 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1786 transitions. Word has length 150 [2020-08-22 00:19:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:19:08,104 INFO L479 AbstractCegarLoop]: Abstraction has 1458 states and 1786 transitions. [2020-08-22 00:19:08,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:19:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1786 transitions. [2020-08-22 00:19:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 00:19:08,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:19:08,109 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] [2020-08-22 00:19:08,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:19:08,109 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:19:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:19:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 464652536, now seen corresponding path program 1 times [2020-08-22 00:19:08,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:19:08,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50028367] [2020-08-22 00:19:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:19:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:19:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:19:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:19:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:19:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 00:19:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 00:19:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 00:19:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-08-22 00:19:08,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50028367] [2020-08-22 00:19:08,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:19:08,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 00:19:08,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971398564] [2020-08-22 00:19:08,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 00:19:08,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:19:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 00:19:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:19:08,766 INFO L87 Difference]: Start difference. First operand 1458 states and 1786 transitions. Second operand 13 states. [2020-08-22 00:19:10,520 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-08-22 00:19:11,656 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-08-22 00:19:11,865 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-08-22 00:19:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:19:15,304 INFO L93 Difference]: Finished difference Result 3355 states and 4229 transitions. [2020-08-22 00:19:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 00:19:15,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 152 [2020-08-22 00:19:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:19:15,316 INFO L225 Difference]: With dead ends: 3355 [2020-08-22 00:19:15,316 INFO L226 Difference]: Without dead ends: 1940 [2020-08-22 00:19:15,322 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 [2020-08-22 00:19:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2020-08-22 00:19:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1444. [2020-08-22 00:19:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-08-22 00:19:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1724 transitions. [2020-08-22 00:19:15,493 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1724 transitions. Word has length 152 [2020-08-22 00:19:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:19:15,493 INFO L479 AbstractCegarLoop]: Abstraction has 1444 states and 1724 transitions. [2020-08-22 00:19:15,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 00:19:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1724 transitions. [2020-08-22 00:19:15,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-08-22 00:19:15,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:19:15,500 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] [2020-08-22 00:19:15,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:19:15,500 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:19:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:19:15,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1292040904, now seen corresponding path program 1 times [2020-08-22 00:19:15,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:19:15,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470888831] [2020-08-22 00:19:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:19:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:19:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:19:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:19:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:19:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 00:19:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 00:19:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:15,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:19:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:19:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:19:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 00:19:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 00:19:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-08-22 00:19:16,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470888831] [2020-08-22 00:19:16,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:19:16,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 00:19:16,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739318314] [2020-08-22 00:19:16,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 00:19:16,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:19:16,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 00:19:16,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:19:16,349 INFO L87 Difference]: Start difference. First operand 1444 states and 1724 transitions. Second operand 15 states. [2020-08-22 00:19:16,639 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2020-08-22 00:19:16,852 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-08-22 00:19:18,436 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-08-22 00:19:19,752 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 100 [2020-08-22 00:19:19,960 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 101 [2020-08-22 00:19:24,604 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-08-22 00:19:24,839 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-08-22 00:19:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:19:27,945 INFO L93 Difference]: Finished difference Result 3441 states and 4458 transitions. [2020-08-22 00:19:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 00:19:27,946 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-08-22 00:19:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:19:27,962 INFO L225 Difference]: With dead ends: 3441 [2020-08-22 00:19:27,962 INFO L226 Difference]: Without dead ends: 2674 [2020-08-22 00:19:27,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 00:19:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2020-08-22 00:19:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1764. [2020-08-22 00:19:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2020-08-22 00:19:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2110 transitions. [2020-08-22 00:19:28,187 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2110 transitions. Word has length 197 [2020-08-22 00:19:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:19:28,188 INFO L479 AbstractCegarLoop]: Abstraction has 1764 states and 2110 transitions. [2020-08-22 00:19:28,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 00:19:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2110 transitions. [2020-08-22 00:19:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-22 00:19:28,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:19:28,193 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] [2020-08-22 00:19:28,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:19:28,194 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:19:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:19:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash -340207207, now seen corresponding path program 1 times [2020-08-22 00:19:28,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:19:28,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026140849] [2020-08-22 00:19:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:19:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 00:19:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:19:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:19:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-22 00:19:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 00:19:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 00:19:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 00:19:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:19:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 00:19:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-08-22 00:19:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:19:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-22 00:19:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-22 00:19:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:19:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-08-22 00:19:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:19:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-08-22 00:19:28,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026140849] [2020-08-22 00:19:28,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:19:28,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 00:19:28,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889770291] [2020-08-22 00:19:28,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 00:19:28,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:19:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 00:19:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:19:28,831 INFO L87 Difference]: Start difference. First operand 1764 states and 2110 transitions. Second operand 11 states. [2020-08-22 00:19:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:19:32,002 INFO L93 Difference]: Finished difference Result 3189 states and 3956 transitions. [2020-08-22 00:19:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 00:19:32,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 199 [2020-08-22 00:19:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:19:32,019 INFO L225 Difference]: With dead ends: 3189 [2020-08-22 00:19:32,019 INFO L226 Difference]: Without dead ends: 2148 [2020-08-22 00:19:32,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:19:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2020-08-22 00:19:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 1764. [2020-08-22 00:19:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2020-08-22 00:19:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2102 transitions. [2020-08-22 00:19:32,433 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2102 transitions. Word has length 199 [2020-08-22 00:19:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:19:32,437 INFO L479 AbstractCegarLoop]: Abstraction has 1764 states and 2102 transitions. [2020-08-22 00:19:32,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 00:19:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2102 transitions. [2020-08-22 00:19:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-08-22 00:19:32,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:19:32,446 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:19:32,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:19:32,446 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:19:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:19:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash 58334816, now seen corresponding path program 1 times [2020-08-22 00:19:32,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:19:32,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214929079] [2020-08-22 00:19:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:19:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 00:19:32,744 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 00:19:32,745 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 00:19:32,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:19:32,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:19:32 BoogieIcfgContainer [2020-08-22 00:19:32,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:19:32,818 INFO L168 Benchmark]: Toolchain (without parser) took 57293.59 ms. Allocated memory was 140.0 MB in the beginning and 861.9 MB in the end (delta: 721.9 MB). Free memory was 93.7 MB in the beginning and 696.3 MB in the end (delta: -602.6 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. [2020-08-22 00:19:32,818 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 00:19:32,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1578.78 ms. Allocated memory was 140.0 MB in the beginning and 208.7 MB in the end (delta: 68.7 MB). Free memory was 93.5 MB in the beginning and 102.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2020-08-22 00:19:32,821 INFO L168 Benchmark]: Boogie Preprocessor took 168.71 ms. Allocated memory is still 208.7 MB. Free memory was 102.4 MB in the beginning and 95.1 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. [2020-08-22 00:19:32,830 INFO L168 Benchmark]: RCFGBuilder took 1521.78 ms. Allocated memory was 208.7 MB in the beginning and 262.7 MB in the end (delta: 54.0 MB). Free memory was 95.1 MB in the beginning and 196.7 MB in the end (delta: -101.5 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. [2020-08-22 00:19:32,831 INFO L168 Benchmark]: TraceAbstraction took 54019.51 ms. Allocated memory was 262.7 MB in the beginning and 861.9 MB in the end (delta: 599.3 MB). Free memory was 196.7 MB in the beginning and 696.3 MB in the end (delta: -499.7 MB). Peak memory consumption was 99.6 MB. Max. memory is 7.1 GB. [2020-08-22 00:19:32,838 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1578.78 ms. Allocated memory was 140.0 MB in the beginning and 208.7 MB in the end (delta: 68.7 MB). Free memory was 93.5 MB in the beginning and 102.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 168.71 ms. Allocated memory is still 208.7 MB. Free memory was 102.4 MB in the beginning and 95.1 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1521.78 ms. Allocated memory was 208.7 MB in the beginning and 262.7 MB in the end (delta: 54.0 MB). Free memory was 95.1 MB in the beginning and 196.7 MB in the end (delta: -101.5 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 54019.51 ms. Allocated memory was 262.7 MB in the beginning and 861.9 MB in the end (delta: 599.3 MB). Free memory was 196.7 MB in the beginning and 696.3 MB in the end (delta: -499.7 MB). Peak memory consumption was 99.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5309]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L5332] int LDV_IN_INTERRUPT = 1; [L5333] struct sk_buff *proto_group0 ; [L5334] int ref_cnt ; [L5335] int ldv_state_variable_1 ; [L5336] struct net_device *proto_group1 ; [L5337] int ldv_state_variable_0 ; [L5553-L5555] static struct hdlc_proto proto = {& x25_open, & x25_close, 0, 0, 0, & x25_ioctl, 0, & x25_rx, & x25_xmit, & __this_module, 0}; [L5622] int ldv_retval_0 ; [L5623] int ldv_retval_1 ; [L5826] Element set_impl[15] ; [L5827] int last_index = 0; [L5961] Set LDV_SKBS ; [L5640] struct ifreq *ldvarg0 ; [L5641] void *tmp ; [L5642] int tmp___0 ; [L5643] int tmp___1 ; [L5644] int tmp___2 ; [L5646] CALL, EXPR ldv_successful_zalloc(40UL) [L5251] EXPR, FCALL calloc(1UL, __size) [L5251] void *p = calloc(1UL, __size); [L5252] CALL assume_abort_if_not(p != (void *)0) [L5248] COND FALSE !(!cond) [L5252] RET assume_abort_if_not(p != (void *)0) [L5253] return p; [L5646] RET, EXPR ldv_successful_zalloc(40UL) [L5646] tmp = ldv_successful_zalloc(40UL) [L5647] ldvarg0 = (struct ifreq *)tmp [L5648] CALL ldv_initialize() [L5980] CALL ldv_set_init(LDV_SKBS) [L5832] set = set_impl [L5833] last_index = 0 [L5980] RET ldv_set_init(LDV_SKBS) [L5648] RET ldv_initialize() [L5649] ldv_state_variable_1 = 0 [L5650] ref_cnt = 0 [L5651] ldv_state_variable_0 = 1 [L5653] tmp___0 = __VERIFIER_nondet_int() [L5655] case 0: [L5720] case 1: [L5721] COND TRUE ldv_state_variable_0 != 0 [L5722] tmp___2 = __VERIFIER_nondet_int() [L5724] case 0: [L5732] case 1: [L5733] COND TRUE ldv_state_variable_0 == 1 [L5734] CALL, EXPR mod_init() [L5611] FCALL register_hdlc_protocol(& proto) [L5612] return (0); [L5734] RET, EXPR mod_init() [L5734] ldv_retval_1 = mod_init() [L5735] COND TRUE ldv_retval_1 == 0 [L5736] ldv_state_variable_0 = 3 [L5737] ldv_state_variable_1 = 1 [L5738] CALL ldv_initialize_hdlc_proto_1() [L5628] void *tmp ; [L5629] void *tmp___0 ; [L5631] CALL, EXPR ldv_successful_zalloc(3264UL) [L5251] EXPR, FCALL calloc(1UL, __size) [L5251] void *p = calloc(1UL, __size); [L5252] CALL assume_abort_if_not(p != (void *)0) [L5248] COND FALSE !(!cond) [L5252] RET assume_abort_if_not(p != (void *)0) [L5253] return p; [L5631] RET, EXPR ldv_successful_zalloc(3264UL) [L5631] tmp = ldv_successful_zalloc(3264UL) [L5632] proto_group1 = (struct net_device *)tmp [L5633] CALL, EXPR ldv_successful_zalloc(232UL) [L5251] EXPR, FCALL calloc(1UL, __size) [L5251] void *p = calloc(1UL, __size); [L5252] CALL assume_abort_if_not(p != (void *)0) [L5248] COND FALSE !(!cond) [L5252] RET assume_abort_if_not(p != (void *)0) [L5253] return p; [L5633] RET, EXPR ldv_successful_zalloc(232UL) [L5633] tmp___0 = ldv_successful_zalloc(232UL) [L5634] proto_group0 = (struct sk_buff *)tmp___0 [L5738] RET ldv_initialize_hdlc_proto_1() [L5741] COND FALSE !(ldv_retval_1 != 0) [L5653] tmp___0 = __VERIFIER_nondet_int() [L5655] case 0: [L5656] COND TRUE ldv_state_variable_1 != 0 [L5657] tmp___1 = __VERIFIER_nondet_int() [L5659] case 0: [L5660] COND TRUE ldv_state_variable_1 == 1 [L5661] CALL x25_xmit(proto_group0, proto_group1) [L5460] int result ; [L5462] CALL assume_abort_if_not(((void*)(skb)) != ((void*) 0)) [L5248] COND FALSE !(!cond) [L5462] RET assume_abort_if_not(((void*)(skb)) != ((void*) 0)) [L5463] EXPR skb->data [L5463] CALL assume_abort_if_not(((void*)((skb->data))) != ((void*) 0)) [L5248] COND FALSE !(!cond) [L5463] RET assume_abort_if_not(((void*)((skb->data))) != ((void*) 0)) [L5464] skb->data [L5465] case 0: [L5473] case 1: [L5485] case 2: [L5486] CALL, EXPR lapb_disconnect_request(dev) [L6069] return __VERIFIER_nondet_int(); [L5486] RET, EXPR lapb_disconnect_request(dev) [L5486] result = lapb_disconnect_request(dev) [L5487] COND TRUE result != 0 [L5488] COND TRUE result == 4 [L5489] CALL x25_disconnected(dev, 0) [L5424] CALL x25_connect_disconnect(dev, reason, 2) [L5398] struct sk_buff *skb ; [L5399] unsigned char *ptr ; [L5401] CALL, EXPR ldv_dev_alloc_skb_12(1U) [L5803] struct sk_buff *tmp ; [L5805] CALL, EXPR ldv_skb_alloc() [L5964] void *skb ; [L5965] void *tmp___7 ; [L5967] CALL, EXPR ldv_successful_zalloc(sizeof(struct sk_buff___0 )) [L5251] EXPR, FCALL calloc(1UL, __size) [L5251] void *p = calloc(1UL, __size); [L5252] CALL assume_abort_if_not(p != (void *)0) [L5248] COND FALSE !(!cond) [L5252] RET assume_abort_if_not(p != (void *)0) [L5253] return p; [L5967] RET, EXPR ldv_successful_zalloc(sizeof(struct sk_buff___0 )) [L5967] tmp___7 = ldv_successful_zalloc(sizeof(struct sk_buff___0 )) [L5968] skb = (struct sk_buff___0 *)tmp___7 [L5969] COND FALSE !(! skb) [L5972] CALL ldv_set_add(LDV_SKBS, skb) [L5840] int i ; [L5842] i = 0 [L5843] COND TRUE 1 [L5844] COND FALSE !(i < last_index) [L5854] COND TRUE last_index < 15 [L5855] set_impl[last_index] = e [L5856] last_index = last_index + 1 [L5972] RET ldv_set_add(LDV_SKBS, skb) [L5973] return (skb); [L5805] RET, EXPR ldv_skb_alloc() [L5805] tmp = ldv_skb_alloc() [L5806] return (tmp); [L5401] RET, EXPR ldv_dev_alloc_skb_12(1U) [L5401] skb = ldv_dev_alloc_skb_12(1U) [L5402] COND TRUE (unsigned long )skb == (unsigned long )((struct sk_buff *)0) [L5424] RET x25_connect_disconnect(dev, reason, 2) [L5489] RET x25_disconnected(dev, 0) [L5501] CALL ldv_skb_free(skb) [L5987] CALL ldv_set_remove(LDV_SKBS, skb) [L5865] int i ; [L5866] int deleted_index ; [L5868] deleted_index = -1 [L5869] i = 0 [L5870] COND TRUE 1 [L5871] COND TRUE i < last_index [L5875] EXPR set_impl[i] [L5875] COND FALSE !((unsigned long )set_impl[i] == (unsigned long )e) [L5880] i = i + 1 [L5870] COND TRUE 1 [L5871] COND FALSE !(i < last_index) [L5882] COND FALSE !(deleted_index != -1) [L5987] RET ldv_set_remove(LDV_SKBS, skb) [L5501] RET ldv_skb_free(skb) [L5502] return (0); [L5661] RET x25_xmit(proto_group0, proto_group1) [L5662] ldv_state_variable_1 = 1 [L5665] COND FALSE !(ldv_state_variable_1 == 2) [L5653] tmp___0 = __VERIFIER_nondet_int() [L5655] case 0: [L5720] case 1: [L5721] COND TRUE ldv_state_variable_0 != 0 [L5722] tmp___2 = __VERIFIER_nondet_int() [L5724] case 0: [L5725] COND TRUE ldv_state_variable_0 == 3 && ref_cnt == 0 [L5726] CALL mod_exit() [L5618] FCALL unregister_hdlc_protocol(& proto) [L5726] RET mod_exit() [L5727] ldv_state_variable_0 = 2 [L5762] CALL ldv_check_final_state() [L6031] int tmp___7 ; [L6033] CALL, EXPR ldv_set_is_empty(LDV_SKBS) [L5922] return (last_index == 0); [L6033] RET, EXPR ldv_set_is_empty(LDV_SKBS) [L6033] tmp___7 = ldv_set_is_empty(LDV_SKBS) [L6034] COND FALSE !(\read(tmp___7)) [L6036] CALL ldv_error() [L5309] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 89 procedures, 541 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 53.8s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 46.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3756 SDtfs, 14594 SDslu, 7220 SDs, 0 SdLazy, 17095 SolverSat, 9392 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 556 GetRequests, 378 SyntacticMatches, 9 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2727occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 9 MinimizatonAttempts, 3744 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 1419 NumberOfCodeBlocks, 1419 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1209 ConstructedInterpolants, 0 QuantifiedInterpolants, 512207 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 621/621 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect!